[ Index ]

PHP Cross Reference of WordPress Trunk (Updated Daily)

Search

title

Body

[close]

/wp-includes/ -> general-template.php (source)

   1  <?php
   2  /**
   3   * General template tags that can go anywhere in a template.
   4   *
   5   * @package WordPress
   6   * @subpackage Template
   7   */
   8  
   9  /**
  10   * Loads header template.
  11   *
  12   * Includes the header template for a theme or if a name is specified then a
  13   * specialized header will be included.
  14   *
  15   * For the parameter, if the file is called "header-special.php" then specify
  16   * "special".
  17   *
  18   * @since 1.5.0
  19   * @since 5.5.0 A return value was added.
  20   * @since 5.5.0 The `$args` parameter was added.
  21   *
  22   * @param string $name The name of the specialized header.
  23   * @param array  $args Optional. Additional arguments passed to the header template.
  24   *                     Default empty array.
  25   * @return void|false Void on success, false if the template does not exist.
  26   */
  27  function get_header( $name = null, $args = array() ) {
  28      /**
  29       * Fires before the header template file is loaded.
  30       *
  31       * @since 2.1.0
  32       * @since 2.8.0 The `$name` parameter was added.
  33       * @since 5.5.0 The `$args` parameter was added.
  34       *
  35       * @param string|null $name Name of the specific header file to use. Null for the default header.
  36       * @param array       $args Additional arguments passed to the header template.
  37       */
  38      do_action( 'get_header', $name, $args );
  39  
  40      $templates = array();
  41      $name      = (string) $name;
  42      if ( '' !== $name ) {
  43          $templates[] = "header-{$name}.php";
  44      }
  45  
  46      $templates[] = 'header.php';
  47  
  48      if ( ! locate_template( $templates, true, true, $args ) ) {
  49          return false;
  50      }
  51  }
  52  
  53  /**
  54   * Loads footer template.
  55   *
  56   * Includes the footer template for a theme or if a name is specified then a
  57   * specialized footer will be included.
  58   *
  59   * For the parameter, if the file is called "footer-special.php" then specify
  60   * "special".
  61   *
  62   * @since 1.5.0
  63   * @since 5.5.0 A return value was added.
  64   * @since 5.5.0 The `$args` parameter was added.
  65   *
  66   * @param string $name The name of the specialized footer.
  67   * @param array  $args Optional. Additional arguments passed to the footer template.
  68   *                     Default empty array.
  69   * @return void|false Void on success, false if the template does not exist.
  70   */
  71  function get_footer( $name = null, $args = array() ) {
  72      /**
  73       * Fires before the footer template file is loaded.
  74       *
  75       * @since 2.1.0
  76       * @since 2.8.0 The `$name` parameter was added.
  77       * @since 5.5.0 The `$args` parameter was added.
  78       *
  79       * @param string|null $name Name of the specific footer file to use. Null for the default footer.
  80       * @param array       $args Additional arguments passed to the footer template.
  81       */
  82      do_action( 'get_footer', $name, $args );
  83  
  84      $templates = array();
  85      $name      = (string) $name;
  86      if ( '' !== $name ) {
  87          $templates[] = "footer-{$name}.php";
  88      }
  89  
  90      $templates[] = 'footer.php';
  91  
  92      if ( ! locate_template( $templates, true, true, $args ) ) {
  93          return false;
  94      }
  95  }
  96  
  97  /**
  98   * Loads sidebar template.
  99   *
 100   * Includes the sidebar template for a theme or if a name is specified then a
 101   * specialized sidebar will be included.
 102   *
 103   * For the parameter, if the file is called "sidebar-special.php" then specify
 104   * "special".
 105   *
 106   * @since 1.5.0
 107   * @since 5.5.0 A return value was added.
 108   * @since 5.5.0 The `$args` parameter was added.
 109   *
 110   * @param string $name The name of the specialized sidebar.
 111   * @param array  $args Optional. Additional arguments passed to the sidebar template.
 112   *                     Default empty array.
 113   * @return void|false Void on success, false if the template does not exist.
 114   */
 115  function get_sidebar( $name = null, $args = array() ) {
 116      /**
 117       * Fires before the sidebar template file is loaded.
 118       *
 119       * @since 2.2.0
 120       * @since 2.8.0 The `$name` parameter was added.
 121       * @since 5.5.0 The `$args` parameter was added.
 122       *
 123       * @param string|null $name Name of the specific sidebar file to use. Null for the default sidebar.
 124       * @param array       $args Additional arguments passed to the sidebar template.
 125       */
 126      do_action( 'get_sidebar', $name, $args );
 127  
 128      $templates = array();
 129      $name      = (string) $name;
 130      if ( '' !== $name ) {
 131          $templates[] = "sidebar-{$name}.php";
 132      }
 133  
 134      $templates[] = 'sidebar.php';
 135  
 136      if ( ! locate_template( $templates, true, true, $args ) ) {
 137          return false;
 138      }
 139  }
 140  
 141  /**
 142   * Loads a template part into a template.
 143   *
 144   * Provides a simple mechanism for child themes to overload reusable sections of code
 145   * in the theme.
 146   *
 147   * Includes the named template part for a theme or if a name is specified then a
 148   * specialized part will be included. If the theme contains no {slug}.php file
 149   * then no template will be included.
 150   *
 151   * The template is included using require, not require_once, so you may include the
 152   * same template part multiple times.
 153   *
 154   * For the $name parameter, if the file is called "{slug}-special.php" then specify
 155   * "special".
 156   *
 157   * @since 3.0.0
 158   * @since 5.5.0 A return value was added.
 159   * @since 5.5.0 The `$args` parameter was added.
 160   *
 161   * @param string      $slug The slug name for the generic template.
 162   * @param string|null $name Optional. The name of the specialized template.
 163   * @param array       $args Optional. Additional arguments passed to the template.
 164   *                          Default empty array.
 165   * @return void|false Void on success, false if the template does not exist.
 166   */
 167  function get_template_part( $slug, $name = null, $args = array() ) {
 168      /**
 169       * Fires before the specified template part file is loaded.
 170       *
 171       * The dynamic portion of the hook name, `$slug`, refers to the slug name
 172       * for the generic template part.
 173       *
 174       * @since 3.0.0
 175       * @since 5.5.0 The `$args` parameter was added.
 176       *
 177       * @param string      $slug The slug name for the generic template.
 178       * @param string|null $name The name of the specialized template or null if
 179       *                          there is none.
 180       * @param array       $args Additional arguments passed to the template.
 181       */
 182      do_action( "get_template_part_{$slug}", $slug, $name, $args );
 183  
 184      $templates = array();
 185      $name      = (string) $name;
 186      if ( '' !== $name ) {
 187          $templates[] = "{$slug}-{$name}.php";
 188      }
 189  
 190      $templates[] = "{$slug}.php";
 191  
 192      /**
 193       * Fires before an attempt is made to locate and load a template part.
 194       *
 195       * @since 5.2.0
 196       * @since 5.5.0 The `$args` parameter was added.
 197       *
 198       * @param string   $slug      The slug name for the generic template.
 199       * @param string   $name      The name of the specialized template or an empty
 200       *                            string if there is none.
 201       * @param string[] $templates Array of template files to search for, in order.
 202       * @param array    $args      Additional arguments passed to the template.
 203       */
 204      do_action( 'get_template_part', $slug, $name, $templates, $args );
 205  
 206      if ( ! locate_template( $templates, true, false, $args ) ) {
 207          return false;
 208      }
 209  }
 210  
 211  /**
 212   * Displays search form.
 213   *
 214   * Will first attempt to locate the searchform.php file in either the child or
 215   * the parent, then load it. If it doesn't exist, then the default search form
 216   * will be displayed. The default search form is HTML, which will be displayed.
 217   * There is a filter applied to the search form HTML in order to edit or replace
 218   * it. The filter is {@see 'get_search_form'}.
 219   *
 220   * This function is primarily used by themes which want to hardcode the search
 221   * form into the sidebar and also by the search widget in WordPress.
 222   *
 223   * There is also an action that is called whenever the function is run called,
 224   * {@see 'pre_get_search_form'}. This can be useful for outputting JavaScript that the
 225   * search relies on or various formatting that applies to the beginning of the
 226   * search. To give a few examples of what it can be used for.
 227   *
 228   * @since 2.7.0
 229   * @since 5.2.0 The `$args` array parameter was added in place of an `$echo` boolean flag.
 230   *
 231   * @param array $args {
 232   *     Optional. Array of display arguments.
 233   *
 234   *     @type bool   $echo       Whether to echo or return the form. Default true.
 235   *     @type string $aria_label ARIA label for the search form. Useful to distinguish
 236   *                              multiple search forms on the same page and improve
 237   *                              accessibility. Default empty.
 238   * }
 239   * @return void|string Void if 'echo' argument is true, search form HTML if 'echo' is false.
 240   */
 241  function get_search_form( $args = array() ) {
 242      /**
 243       * Fires before the search form is retrieved, at the start of get_search_form().
 244       *
 245       * @since 2.7.0 as 'get_search_form' action.
 246       * @since 3.6.0
 247       * @since 5.5.0 The `$args` parameter was added.
 248       *
 249       * @link https://core.trac.wordpress.org/ticket/19321
 250       *
 251       * @param array $args The array of arguments for building the search form.
 252       *                    See get_search_form() for information on accepted arguments.
 253       */
 254      do_action( 'pre_get_search_form', $args );
 255  
 256      $echo = true;
 257  
 258      if ( ! is_array( $args ) ) {
 259          /*
 260           * Back compat: to ensure previous uses of get_search_form() continue to
 261           * function as expected, we handle a value for the boolean $echo param removed
 262           * in 5.2.0. Then we deal with the $args array and cast its defaults.
 263           */
 264          $echo = (bool) $args;
 265  
 266          // Set an empty array and allow default arguments to take over.
 267          $args = array();
 268      }
 269  
 270      // Defaults are to echo and to output no custom label on the form.
 271      $defaults = array(
 272          'echo'       => $echo,
 273          'aria_label' => '',
 274      );
 275  
 276      $args = wp_parse_args( $args, $defaults );
 277  
 278      /**
 279       * Filters the array of arguments used when generating the search form.
 280       *
 281       * @since 5.2.0
 282       *
 283       * @param array $args The array of arguments for building the search form.
 284       *                    See get_search_form() for information on accepted arguments.
 285       */
 286      $args = apply_filters( 'search_form_args', $args );
 287  
 288      // Ensure that the filtered arguments contain all required default values.
 289      $args = array_merge( $defaults, $args );
 290  
 291      $format = current_theme_supports( 'html5', 'search-form' ) ? 'html5' : 'xhtml';
 292  
 293      /**
 294       * Filters the HTML format of the search form.
 295       *
 296       * @since 3.6.0
 297       * @since 5.5.0 The `$args` parameter was added.
 298       *
 299       * @param string $format The type of markup to use in the search form.
 300       *                       Accepts 'html5', 'xhtml'.
 301       * @param array  $args   The array of arguments for building the search form.
 302       *                       See get_search_form() for information on accepted arguments.
 303       */
 304      $format = apply_filters( 'search_form_format', $format, $args );
 305  
 306      $search_form_template = locate_template( 'searchform.php' );
 307  
 308      if ( '' !== $search_form_template ) {
 309          ob_start();
 310          require $search_form_template;
 311          $form = ob_get_clean();
 312      } else {
 313          // Build a string containing an aria-label to use for the search form.
 314          if ( $args['aria_label'] ) {
 315              $aria_label = 'aria-label="' . esc_attr( $args['aria_label'] ) . '" ';
 316          } else {
 317              /*
 318               * If there's no custom aria-label, we can set a default here. At the
 319               * moment it's empty as there's uncertainty about what the default should be.
 320               */
 321              $aria_label = '';
 322          }
 323  
 324          if ( 'html5' === $format ) {
 325              $form = '<form role="search" ' . $aria_label . 'method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '">
 326                  <label>
 327                      <span class="screen-reader-text">' .
 328                      /* translators: Hidden accessibility text. */
 329                      _x( 'Search for:', 'label' ) .
 330                      '</span>
 331                      <input type="search" class="search-field" placeholder="' . esc_attr_x( 'Search &hellip;', 'placeholder' ) . '" value="' . get_search_query() . '" name="s" />
 332                  </label>
 333                  <input type="submit" class="search-submit" value="' . esc_attr_x( 'Search', 'submit button' ) . '" />
 334              </form>';
 335          } else {
 336              $form = '<form role="search" ' . $aria_label . 'method="get" id="searchform" class="searchform" action="' . esc_url( home_url( '/' ) ) . '">
 337                  <div>
 338                      <label class="screen-reader-text" for="s">' .
 339                      /* translators: Hidden accessibility text. */
 340                      _x( 'Search for:', 'label' ) .
 341                      '</label>
 342                      <input type="text" value="' . get_search_query() . '" name="s" id="s" />
 343                      <input type="submit" id="searchsubmit" value="' . esc_attr_x( 'Search', 'submit button' ) . '" />
 344                  </div>
 345              </form>';
 346          }
 347      }
 348  
 349      /**
 350       * Filters the HTML output of the search form.
 351       *
 352       * @since 2.7.0
 353       * @since 5.5.0 The `$args` parameter was added.
 354       *
 355       * @param string $form The search form HTML output.
 356       * @param array  $args The array of arguments for building the search form.
 357       *                     See get_search_form() for information on accepted arguments.
 358       */
 359      $result = apply_filters( 'get_search_form', $form, $args );
 360  
 361      if ( null === $result ) {
 362          $result = $form;
 363      }
 364  
 365      if ( $args['echo'] ) {
 366          echo $result;
 367      } else {
 368          return $result;
 369      }
 370  }
 371  
 372  /**
 373   * Displays the Log In/Out link.
 374   *
 375   * Displays a link, which allows users to navigate to the Log In page to log in
 376   * or log out depending on whether they are currently logged in.
 377   *
 378   * @since 1.5.0
 379   *
 380   * @param string $redirect Optional path to redirect to on login/logout.
 381   * @param bool   $display  Default to echo and not return the link.
 382   * @return void|string Void if `$display` argument is true, log in/out link if `$display` is false.
 383   */
 384  function wp_loginout( $redirect = '', $display = true ) {
 385      if ( ! is_user_logged_in() ) {
 386          $link = '<a href="' . esc_url( wp_login_url( $redirect ) ) . '">' . __( 'Log in' ) . '</a>';
 387      } else {
 388          $link = '<a href="' . esc_url( wp_logout_url( $redirect ) ) . '">' . __( 'Log out' ) . '</a>';
 389      }
 390  
 391      if ( $display ) {
 392          /**
 393           * Filters the HTML output for the Log In/Log Out link.
 394           *
 395           * @since 1.5.0
 396           *
 397           * @param string $link The HTML link content.
 398           */
 399          echo apply_filters( 'loginout', $link );
 400      } else {
 401          /** This filter is documented in wp-includes/general-template.php */
 402          return apply_filters( 'loginout', $link );
 403      }
 404  }
 405  
 406  /**
 407   * Retrieves the logout URL.
 408   *
 409   * Returns the URL that allows the user to log out of the site.
 410   *
 411   * @since 2.7.0
 412   *
 413   * @param string $redirect Path to redirect to on logout.
 414   * @return string The logout URL. Note: HTML-encoded via esc_html() in wp_nonce_url().
 415   */
 416  function wp_logout_url( $redirect = '' ) {
 417      $args = array();
 418      if ( ! empty( $redirect ) ) {
 419          $args['redirect_to'] = urlencode( $redirect );
 420      }
 421  
 422      $logout_url = add_query_arg( $args, site_url( 'wp-login.php?action=logout', 'login' ) );
 423      $logout_url = wp_nonce_url( $logout_url, 'log-out' );
 424  
 425      /**
 426       * Filters the logout URL.
 427       *
 428       * @since 2.8.0
 429       *
 430       * @param string $logout_url The HTML-encoded logout URL.
 431       * @param string $redirect   Path to redirect to on logout.
 432       */
 433      return apply_filters( 'logout_url', $logout_url, $redirect );
 434  }
 435  
 436  /**
 437   * Retrieves the login URL.
 438   *
 439   * @since 2.7.0
 440   *
 441   * @param string $redirect     Path to redirect to on log in.
 442   * @param bool   $force_reauth Whether to force reauthorization, even if a cookie is present.
 443   *                             Default false.
 444   * @return string The login URL. Not HTML-encoded.
 445   */
 446  function wp_login_url( $redirect = '', $force_reauth = false ) {
 447      $login_url = site_url( 'wp-login.php', 'login' );
 448  
 449      if ( ! empty( $redirect ) ) {
 450          $login_url = add_query_arg( 'redirect_to', urlencode( $redirect ), $login_url );
 451      }
 452  
 453      if ( $force_reauth ) {
 454          $login_url = add_query_arg( 'reauth', '1', $login_url );
 455      }
 456  
 457      /**
 458       * Filters the login URL.
 459       *
 460       * @since 2.8.0
 461       * @since 4.2.0 The `$force_reauth` parameter was added.
 462       *
 463       * @param string $login_url    The login URL. Not HTML-encoded.
 464       * @param string $redirect     The path to redirect to on login, if supplied.
 465       * @param bool   $force_reauth Whether to force reauthorization, even if a cookie is present.
 466       */
 467      return apply_filters( 'login_url', $login_url, $redirect, $force_reauth );
 468  }
 469  
 470  /**
 471   * Returns the URL that allows the user to register on the site.
 472   *
 473   * @since 3.6.0
 474   *
 475   * @return string User registration URL.
 476   */
 477  function wp_registration_url() {
 478      /**
 479       * Filters the user registration URL.
 480       *
 481       * @since 3.6.0
 482       *
 483       * @param string $register The user registration URL.
 484       */
 485      return apply_filters( 'register_url', site_url( 'wp-login.php?action=register', 'login' ) );
 486  }
 487  
 488  /**
 489   * Provides a simple login form for use anywhere within WordPress.
 490   *
 491   * The login form HTML is echoed by default. Pass a false value for `$echo` to return it instead.
 492   *
 493   * @since 3.0.0
 494   * @since 6.6.0 Added `required_username` and `required_password` arguments.
 495   *
 496   * @param array $args {
 497   *     Optional. Array of options to control the form output. Default empty array.
 498   *
 499   *     @type bool   $echo              Whether to display the login form or return the form HTML code.
 500   *                                     Default true (echo).
 501   *     @type string $redirect          URL to redirect to. Must be absolute, as in "https://example.com/mypage/".
 502   *                                     Default is to redirect back to the request URI.
 503   *     @type string $form_id           ID attribute value for the form. Default 'loginform'.
 504   *     @type string $label_username    Label for the username or email address field. Default 'Username or Email Address'.
 505   *     @type string $label_password    Label for the password field. Default 'Password'.
 506   *     @type string $label_remember    Label for the remember field. Default 'Remember Me'.
 507   *     @type string $label_log_in      Label for the submit button. Default 'Log In'.
 508   *     @type string $id_username       ID attribute value for the username field. Default 'user_login'.
 509   *     @type string $id_password       ID attribute value for the password field. Default 'user_pass'.
 510   *     @type string $id_remember       ID attribute value for the remember field. Default 'rememberme'.
 511   *     @type string $id_submit         ID attribute value for the submit button. Default 'wp-submit'.
 512   *     @type bool   $remember          Whether to display the "rememberme" checkbox in the form.
 513   *     @type string $value_username    Default value for the username field. Default empty.
 514   *     @type bool   $value_remember    Whether the "Remember Me" checkbox should be checked by default.
 515   *                                     Default false (unchecked).
 516   *     @type bool   $required_username Whether the username field has the 'required' attribute.
 517   *                                     Default false.
 518   *     @type bool   $required_password Whether the password field has the 'required' attribute.
 519   *                                     Default false.
 520   *
 521   * }
 522   * @return void|string Void if 'echo' argument is true, login form HTML if 'echo' is false.
 523   */
 524  function wp_login_form( $args = array() ) {
 525      $defaults = array(
 526          'echo'              => true,
 527          // Default 'redirect' value takes the user back to the request URI.
 528          'redirect'          => ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'],
 529          'form_id'           => 'loginform',
 530          'label_username'    => __( 'Username or Email Address' ),
 531          'label_password'    => __( 'Password' ),
 532          'label_remember'    => __( 'Remember Me' ),
 533          'label_log_in'      => __( 'Log In' ),
 534          'id_username'       => 'user_login',
 535          'id_password'       => 'user_pass',
 536          'id_remember'       => 'rememberme',
 537          'id_submit'         => 'wp-submit',
 538          'remember'          => true,
 539          'value_username'    => '',
 540          // Set 'value_remember' to true to default the "Remember me" checkbox to checked.
 541          'value_remember'    => false,
 542          // Set 'required_username' to true to add the required attribute to username field.
 543          'required_username' => false,
 544          // Set 'required_password' to true to add the required attribute to password field.
 545          'required_password' => false,
 546      );
 547  
 548      /**
 549       * Filters the default login form output arguments.
 550       *
 551       * @since 3.0.0
 552       *
 553       * @see wp_login_form()
 554       *
 555       * @param array $defaults An array of default login form arguments.
 556       */
 557      $args = wp_parse_args( $args, apply_filters( 'login_form_defaults', $defaults ) );
 558  
 559      /**
 560       * Filters content to display at the top of the login form.
 561       *
 562       * The filter evaluates just following the opening form tag element.
 563       *
 564       * @since 3.0.0
 565       *
 566       * @param string $content Content to display. Default empty.
 567       * @param array  $args    Array of login form arguments.
 568       */
 569      $login_form_top = apply_filters( 'login_form_top', '', $args );
 570  
 571      /**
 572       * Filters content to display in the middle of the login form.
 573       *
 574       * The filter evaluates just following the location where the 'login-password'
 575       * field is displayed.
 576       *
 577       * @since 3.0.0
 578       *
 579       * @param string $content Content to display. Default empty.
 580       * @param array  $args    Array of login form arguments.
 581       */
 582      $login_form_middle = apply_filters( 'login_form_middle', '', $args );
 583  
 584      /**
 585       * Filters content to display at the bottom of the login form.
 586       *
 587       * The filter evaluates just preceding the closing form tag element.
 588       *
 589       * @since 3.0.0
 590       *
 591       * @param string $content Content to display. Default empty.
 592       * @param array  $args    Array of login form arguments.
 593       */
 594      $login_form_bottom = apply_filters( 'login_form_bottom', '', $args );
 595  
 596      $form =
 597          sprintf(
 598              '<form name="%1$s" id="%1$s" action="%2$s" method="post">',
 599              esc_attr( $args['form_id'] ),
 600              esc_url( site_url( 'wp-login.php', 'login_post' ) )
 601          ) .
 602          $login_form_top .
 603          sprintf(
 604              '<p class="login-username">
 605                  <label for="%1$s">%2$s</label>
 606                  <input type="text" name="log" id="%1$s" autocomplete="username" class="input" value="%3$s" size="20"%4$s />
 607              </p>',
 608              esc_attr( $args['id_username'] ),
 609              esc_html( $args['label_username'] ),
 610              esc_attr( $args['value_username'] ),
 611              ( $args['required_username'] ? ' required="required"' : '' )
 612          ) .
 613          sprintf(
 614              '<p class="login-password">
 615                  <label for="%1$s">%2$s</label>
 616                  <input type="password" name="pwd" id="%1$s" autocomplete="current-password" spellcheck="false" class="input" value="" size="20"%3$s />
 617              </p>',
 618              esc_attr( $args['id_password'] ),
 619              esc_html( $args['label_password'] ),
 620              ( $args['required_password'] ? ' required="required"' : '' )
 621          ) .
 622          $login_form_middle .
 623          ( $args['remember'] ?
 624              sprintf(
 625                  '<p class="login-remember"><label><input name="rememberme" type="checkbox" id="%1$s" value="forever"%2$s /> %3$s</label></p>',
 626                  esc_attr( $args['id_remember'] ),
 627                  ( $args['value_remember'] ? ' checked="checked"' : '' ),
 628                  esc_html( $args['label_remember'] )
 629              ) : ''
 630          ) .
 631          sprintf(
 632              '<p class="login-submit">
 633                  <input type="submit" name="wp-submit" id="%1$s" class="button button-primary" value="%2$s" />
 634                  <input type="hidden" name="redirect_to" value="%3$s" />
 635              </p>',
 636              esc_attr( $args['id_submit'] ),
 637              esc_attr( $args['label_log_in'] ),
 638              esc_url( $args['redirect'] )
 639          ) .
 640          $login_form_bottom .
 641          '</form>';
 642  
 643      if ( $args['echo'] ) {
 644          echo $form;
 645      } else {
 646          return $form;
 647      }
 648  }
 649  
 650  /**
 651   * Returns the URL that allows the user to reset the lost password.
 652   *
 653   * @since 2.8.0
 654   *
 655   * @param string $redirect Path to redirect to on login.
 656   * @return string Lost password URL.
 657   */
 658  function wp_lostpassword_url( $redirect = '' ) {
 659      $args = array(
 660          'action' => 'lostpassword',
 661      );
 662  
 663      if ( ! empty( $redirect ) ) {
 664          $args['redirect_to'] = urlencode( $redirect );
 665      }
 666  
 667      if ( is_multisite() ) {
 668          $blog_details  = get_site();
 669          $wp_login_path = $blog_details->path . 'wp-login.php';
 670      } else {
 671          $wp_login_path = 'wp-login.php';
 672      }
 673  
 674      $lostpassword_url = add_query_arg( $args, network_site_url( $wp_login_path, 'login' ) );
 675  
 676      /**
 677       * Filters the Lost Password URL.
 678       *
 679       * @since 2.8.0
 680       *
 681       * @param string $lostpassword_url The lost password page URL.
 682       * @param string $redirect         The path to redirect to on login.
 683       */
 684      return apply_filters( 'lostpassword_url', $lostpassword_url, $redirect );
 685  }
 686  
 687  /**
 688   * Displays the Registration or Admin link.
 689   *
 690   * Display a link which allows the user to navigate to the registration page if
 691   * not logged in and registration is enabled or to the dashboard if logged in.
 692   *
 693   * @since 1.5.0
 694   *
 695   * @param string $before  Text to output before the link. Default `<li>`.
 696   * @param string $after   Text to output after the link. Default `</li>`.
 697   * @param bool   $display Default to echo and not return the link.
 698   * @return void|string Void if `$display` argument is true, registration or admin link
 699   *                     if `$display` is false.
 700   */
 701  function wp_register( $before = '<li>', $after = '</li>', $display = true ) {
 702      if ( ! is_user_logged_in() ) {
 703          if ( get_option( 'users_can_register' ) ) {
 704              $link = $before . '<a href="' . esc_url( wp_registration_url() ) . '">' . __( 'Register' ) . '</a>' . $after;
 705          } else {
 706              $link = '';
 707          }
 708      } elseif ( current_user_can( 'read' ) ) {
 709          $link = $before . '<a href="' . admin_url() . '">' . __( 'Site Admin' ) . '</a>' . $after;
 710      } else {
 711          $link = '';
 712      }
 713  
 714      /**
 715       * Filters the HTML link to the Registration or Admin page.
 716       *
 717       * Users are sent to the admin page if logged-in, or the registration page
 718       * if enabled and logged-out.
 719       *
 720       * @since 1.5.0
 721       *
 722       * @param string $link The HTML code for the link to the Registration or Admin page.
 723       */
 724      $link = apply_filters( 'register', $link );
 725  
 726      if ( $display ) {
 727          echo $link;
 728      } else {
 729          return $link;
 730      }
 731  }
 732  
 733  /**
 734   * Theme container function for the 'wp_meta' action.
 735   *
 736   * The {@see 'wp_meta'} action can have several purposes, depending on how you use it,
 737   * but one purpose might have been to allow for theme switching.
 738   *
 739   * @since 1.5.0
 740   *
 741   * @link https://core.trac.wordpress.org/ticket/1458 Explanation of 'wp_meta' action.
 742   */
 743  function wp_meta() {
 744      /**
 745       * Fires before displaying echoed content in the sidebar.
 746       *
 747       * @since 1.5.0
 748       */
 749      do_action( 'wp_meta' );
 750  }
 751  
 752  /**
 753   * Displays information about the current site.
 754   *
 755   * @since 0.71
 756   *
 757   * @see get_bloginfo() For possible `$show` values
 758   *
 759   * @param string $show Optional. Site information to display. Default empty.
 760   */
 761  function bloginfo( $show = '' ) {
 762      echo get_bloginfo( $show, 'display' );
 763  }
 764  
 765  /**
 766   * Retrieves information about the current site.
 767   *
 768   * Possible values for `$show` include:
 769   *
 770   * - 'name' - Site title (set in Settings > General)
 771   * - 'description' - Site tagline (set in Settings > General)
 772   * - 'wpurl' - The WordPress address (URL) (set in Settings > General)
 773   * - 'url' - The Site address (URL) (set in Settings > General)
 774   * - 'admin_email' - Admin email (set in Settings > General)
 775   * - 'charset' - The "Encoding for pages and feeds"  (set in Settings > Reading)
 776   * - 'version' - The current WordPress version
 777   * - 'html_type' - The Content-Type (default: "text/html"). Themes and plugins
 778   *   can override the default value using the {@see 'pre_option_html_type'} filter
 779   * - 'text_direction' - The text direction determined by the site's language. is_rtl()
 780   *   should be used instead
 781   * - 'language' - Language code for the current site
 782   * - 'stylesheet_url' - URL to the stylesheet for the active theme. An active child theme
 783   *   will take precedence over this value
 784   * - 'stylesheet_directory' - Directory path for the active theme.  An active child theme
 785   *   will take precedence over this value
 786   * - 'template_url' / 'template_directory' - URL of the active theme's directory. An active
 787   *   child theme will NOT take precedence over this value
 788   * - 'pingback_url' - The pingback XML-RPC file URL (xmlrpc.php)
 789   * - 'atom_url' - The Atom feed URL (/feed/atom)
 790   * - 'rdf_url' - The RDF/RSS 1.0 feed URL (/feed/rdf)
 791   * - 'rss_url' - The RSS 0.92 feed URL (/feed/rss)
 792   * - 'rss2_url' - The RSS 2.0 feed URL (/feed)
 793   * - 'comments_atom_url' - The comments Atom feed URL (/comments/feed)
 794   * - 'comments_rss2_url' - The comments RSS 2.0 feed URL (/comments/feed)
 795   *
 796   * Some `$show` values are deprecated and will be removed in future versions.
 797   * These options will trigger the _deprecated_argument() function.
 798   *
 799   * Deprecated arguments include:
 800   *
 801   * - 'siteurl' - Use 'url' instead
 802   * - 'home' - Use 'url' instead
 803   *
 804   * @since 0.71
 805   *
 806   * @global string $wp_version The WordPress version string.
 807   *
 808   * @param string $show   Optional. Site info to retrieve. Default empty (site name).
 809   * @param string $filter Optional. How to filter what is retrieved. Default 'raw'.
 810   * @return string Mostly string values, might be empty.
 811   */
 812  function get_bloginfo( $show = '', $filter = 'raw' ) {
 813      switch ( $show ) {
 814          case 'home':    // Deprecated.
 815          case 'siteurl': // Deprecated.
 816              _deprecated_argument(
 817                  __FUNCTION__,
 818                  '2.2.0',
 819                  sprintf(
 820                      /* translators: 1: 'siteurl'/'home' argument, 2: bloginfo() function name, 3: 'url' argument. */
 821                      __( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s option instead.' ),
 822                      '<code>' . $show . '</code>',
 823                      '<code>bloginfo()</code>',
 824                      '<code>url</code>'
 825                  )
 826              );
 827              // Intentional fall-through to be handled by the 'url' case.
 828          case 'url':
 829              $output = home_url();
 830              break;
 831          case 'wpurl':
 832              $output = site_url();
 833              break;
 834          case 'description':
 835              $output = get_option( 'blogdescription' );
 836              break;
 837          case 'rdf_url':
 838              $output = get_feed_link( 'rdf' );
 839              break;
 840          case 'rss_url':
 841              $output = get_feed_link( 'rss' );
 842              break;
 843          case 'rss2_url':
 844              $output = get_feed_link( 'rss2' );
 845              break;
 846          case 'atom_url':
 847              $output = get_feed_link( 'atom' );
 848              break;
 849          case 'comments_atom_url':
 850              $output = get_feed_link( 'comments_atom' );
 851              break;
 852          case 'comments_rss2_url':
 853              $output = get_feed_link( 'comments_rss2' );
 854              break;
 855          case 'pingback_url':
 856              $output = site_url( 'xmlrpc.php' );
 857              break;
 858          case 'stylesheet_url':
 859              $output = get_stylesheet_uri();
 860              break;
 861          case 'stylesheet_directory':
 862              $output = get_stylesheet_directory_uri();
 863              break;
 864          case 'template_directory':
 865          case 'template_url':
 866              $output = get_template_directory_uri();
 867              break;
 868          case 'admin_email':
 869              $output = get_option( 'admin_email' );
 870              break;
 871          case 'charset':
 872              $output = get_option( 'blog_charset' );
 873              if ( '' === $output ) {
 874                  $output = 'UTF-8';
 875              }
 876              break;
 877          case 'html_type':
 878              $output = get_option( 'html_type' );
 879              break;
 880          case 'version':
 881              global $wp_version;
 882              $output = $wp_version;
 883              break;
 884          case 'language':
 885              /*
 886               * translators: Translate this to the correct language tag for your locale,
 887               * see https://www.w3.org/International/articles/language-tags/ for reference.
 888               * Do not translate into your own language.
 889               */
 890              $output = __( 'html_lang_attribute' );
 891              if ( 'html_lang_attribute' === $output || preg_match( '/[^a-zA-Z0-9-]/', $output ) ) {
 892                  $output = determine_locale();
 893                  $output = str_replace( '_', '-', $output );
 894              }
 895              break;
 896          case 'text_direction':
 897              _deprecated_argument(
 898                  __FUNCTION__,
 899                  '2.2.0',
 900                  sprintf(
 901                      /* translators: 1: 'text_direction' argument, 2: bloginfo() function name, 3: is_rtl() function name. */
 902                      __( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s function instead.' ),
 903                      '<code>' . $show . '</code>',
 904                      '<code>bloginfo()</code>',
 905                      '<code>is_rtl()</code>'
 906                  )
 907              );
 908              if ( function_exists( 'is_rtl' ) ) {
 909                  $output = is_rtl() ? 'rtl' : 'ltr';
 910              } else {
 911                  $output = 'ltr';
 912              }
 913              break;
 914          case 'name':
 915          default:
 916              $output = get_option( 'blogname' );
 917              break;
 918      }
 919  
 920      if ( 'display' === $filter ) {
 921          if (
 922              str_contains( $show, 'url' )
 923              || str_contains( $show, 'directory' )
 924              || str_contains( $show, 'home' )
 925          ) {
 926              /**
 927               * Filters the URL returned by get_bloginfo().
 928               *
 929               * @since 2.0.5
 930               *
 931               * @param string $output The URL returned by bloginfo().
 932               * @param string $show   Type of information requested.
 933               */
 934              $output = apply_filters( 'bloginfo_url', $output, $show );
 935          } else {
 936              /**
 937               * Filters the site information returned by get_bloginfo().
 938               *
 939               * @since 0.71
 940               *
 941               * @param mixed  $output The requested non-URL site information.
 942               * @param string $show   Type of information requested.
 943               */
 944              $output = apply_filters( 'bloginfo', $output, $show );
 945          }
 946      }
 947  
 948      return $output;
 949  }
 950  
 951  /**
 952   * Returns the Site Icon URL.
 953   *
 954   * @since 4.3.0
 955   *
 956   * @param int    $size    Optional. Size of the site icon. Default 512 (pixels).
 957   * @param string $url     Optional. Fallback url if no site icon is found. Default empty.
 958   * @param int    $blog_id Optional. ID of the blog to get the site icon for. Default current blog.
 959   * @return string Site Icon URL.
 960   */
 961  function get_site_icon_url( $size = 512, $url = '', $blog_id = 0 ) {
 962      $switched_blog = false;
 963  
 964      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
 965          switch_to_blog( $blog_id );
 966          $switched_blog = true;
 967      }
 968  
 969      $site_icon_id = (int) get_option( 'site_icon' );
 970  
 971      if ( $site_icon_id ) {
 972          if ( $size >= 512 ) {
 973              $size_data = 'full';
 974          } else {
 975              $size_data = array( $size, $size );
 976          }
 977          $url = wp_get_attachment_image_url( $site_icon_id, $size_data );
 978      }
 979  
 980      if ( $switched_blog ) {
 981          restore_current_blog();
 982      }
 983  
 984      /**
 985       * Filters the site icon URL.
 986       *
 987       * @since 4.4.0
 988       *
 989       * @param string $url     Site icon URL.
 990       * @param int    $size    Size of the site icon.
 991       * @param int    $blog_id ID of the blog to get the site icon for.
 992       */
 993      return apply_filters( 'get_site_icon_url', $url, $size, $blog_id );
 994  }
 995  
 996  /**
 997   * Displays the Site Icon URL.
 998   *
 999   * @since 4.3.0
1000   *
1001   * @param int    $size    Optional. Size of the site icon. Default 512 (pixels).
1002   * @param string $url     Optional. Fallback url if no site icon is found. Default empty.
1003   * @param int    $blog_id Optional. ID of the blog to get the site icon for. Default current blog.
1004   */
1005  function site_icon_url( $size = 512, $url = '', $blog_id = 0 ) {
1006      echo esc_url( get_site_icon_url( $size, $url, $blog_id ) );
1007  }
1008  
1009  /**
1010   * Determines whether the site has a Site Icon.
1011   *
1012   * @since 4.3.0
1013   *
1014   * @param int $blog_id Optional. ID of the blog in question. Default current blog.
1015   * @return bool Whether the site has a site icon or not.
1016   */
1017  function has_site_icon( $blog_id = 0 ) {
1018      return (bool) get_site_icon_url( 512, '', $blog_id );
1019  }
1020  
1021  /**
1022   * Determines whether the site has a custom logo.
1023   *
1024   * @since 4.5.0
1025   *
1026   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
1027   * @return bool Whether the site has a custom logo or not.
1028   */
1029  function has_custom_logo( $blog_id = 0 ) {
1030      $switched_blog = false;
1031  
1032      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
1033          switch_to_blog( $blog_id );
1034          $switched_blog = true;
1035      }
1036  
1037      $custom_logo_id = get_theme_mod( 'custom_logo' );
1038      $is_image       = ( $custom_logo_id ) ? wp_attachment_is_image( $custom_logo_id ) : false;
1039  
1040      if ( $switched_blog ) {
1041          restore_current_blog();
1042      }
1043  
1044      return $is_image;
1045  }
1046  
1047  /**
1048   * Returns a custom logo, linked to home unless the theme supports removing the link on the home page.
1049   *
1050   * @since 4.5.0
1051   * @since 5.5.0 Added option to remove the link on the home page with `unlink-homepage-logo` theme support
1052   *              for the `custom-logo` theme feature.
1053   * @since 5.5.1 Disabled lazy-loading by default.
1054   *
1055   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
1056   * @return string Custom logo markup.
1057   */
1058  function get_custom_logo( $blog_id = 0 ) {
1059      $html          = '';
1060      $switched_blog = false;
1061  
1062      if ( is_multisite() && ! empty( $blog_id ) && get_current_blog_id() !== (int) $blog_id ) {
1063          switch_to_blog( $blog_id );
1064          $switched_blog = true;
1065      }
1066  
1067      // We have a logo. Logo is go.
1068      if ( has_custom_logo() ) {
1069          $custom_logo_id   = get_theme_mod( 'custom_logo' );
1070          $custom_logo_attr = array(
1071              'class'   => 'custom-logo',
1072              'loading' => false,
1073          );
1074  
1075          $unlink_homepage_logo = (bool) get_theme_support( 'custom-logo', 'unlink-homepage-logo' );
1076  
1077          if ( $unlink_homepage_logo && is_front_page() && ! is_paged() ) {
1078              /*
1079               * If on the home page, set the logo alt attribute to an empty string,
1080               * as the image is decorative and doesn't need its purpose to be described.
1081               */
1082              $custom_logo_attr['alt'] = '';
1083          } else {
1084              /*
1085               * If the logo alt attribute is empty, get the site title and explicitly pass it
1086               * to the attributes used by wp_get_attachment_image().
1087               */
1088              $image_alt = get_post_meta( $custom_logo_id, '_wp_attachment_image_alt', true );
1089              if ( empty( $image_alt ) ) {
1090                  $custom_logo_attr['alt'] = get_bloginfo( 'name', 'display' );
1091              }
1092          }
1093  
1094          /**
1095           * Filters the list of custom logo image attributes.
1096           *
1097           * @since 5.5.0
1098           *
1099           * @param array $custom_logo_attr Custom logo image attributes.
1100           * @param int   $custom_logo_id   Custom logo attachment ID.
1101           * @param int   $blog_id          ID of the blog to get the custom logo for.
1102           */
1103          $custom_logo_attr = apply_filters( 'get_custom_logo_image_attributes', $custom_logo_attr, $custom_logo_id, $blog_id );
1104  
1105          /*
1106           * If the alt attribute is not empty, there's no need to explicitly pass it
1107           * because wp_get_attachment_image() already adds the alt attribute.
1108           */
1109          $image = wp_get_attachment_image( $custom_logo_id, 'full', false, $custom_logo_attr );
1110  
1111          // Check that we have a proper HTML img element.
1112          if ( $image ) {
1113  
1114              if ( $unlink_homepage_logo && is_front_page() && ! is_paged() ) {
1115                  // If on the home page, don't link the logo to home.
1116                  $html = sprintf(
1117                      '<span class="custom-logo-link">%1$s</span>',
1118                      $image
1119                  );
1120              } else {
1121                  $aria_current = is_front_page() && ! is_paged() ? ' aria-current="page"' : '';
1122  
1123                  $html = sprintf(
1124                      '<a href="%1$s" class="custom-logo-link" rel="home"%2$s>%3$s</a>',
1125                      esc_url( home_url( '/' ) ),
1126                      $aria_current,
1127                      $image
1128                  );
1129              }
1130          }
1131      } elseif ( is_customize_preview() ) {
1132          // If no logo is set but we're in the Customizer, leave a placeholder (needed for the live preview).
1133          $html = sprintf(
1134              '<a href="%1$s" class="custom-logo-link" style="display:none;"><img class="custom-logo" alt="" /></a>',
1135              esc_url( home_url( '/' ) )
1136          );
1137      }
1138  
1139      if ( $switched_blog ) {
1140          restore_current_blog();
1141      }
1142  
1143      /**
1144       * Filters the custom logo output.
1145       *
1146       * @since 4.5.0
1147       * @since 4.6.0 Added the `$blog_id` parameter.
1148       *
1149       * @param string $html    Custom logo HTML output.
1150       * @param int    $blog_id ID of the blog to get the custom logo for.
1151       */
1152      return apply_filters( 'get_custom_logo', $html, $blog_id );
1153  }
1154  
1155  /**
1156   * Displays a custom logo, linked to home unless the theme supports removing the link on the home page.
1157   *
1158   * @since 4.5.0
1159   *
1160   * @param int $blog_id Optional. ID of the blog in question. Default is the ID of the current blog.
1161   */
1162  function the_custom_logo( $blog_id = 0 ) {
1163      echo get_custom_logo( $blog_id );
1164  }
1165  
1166  /**
1167   * Returns document title for the current page.
1168   *
1169   * @since 4.4.0
1170   *
1171   * @global int $page  Page number of a single post.
1172   * @global int $paged Page number of a list of posts.
1173   *
1174   * @return string Tag with the document title.
1175   */
1176  function wp_get_document_title() {
1177  
1178      /**
1179       * Filters the document title before it is generated.
1180       *
1181       * Passing a non-empty value will short-circuit wp_get_document_title(),
1182       * returning that value instead.
1183       *
1184       * @since 4.4.0
1185       *
1186       * @param string $title The document title. Default empty string.
1187       */
1188      $title = apply_filters( 'pre_get_document_title', '' );
1189      if ( ! empty( $title ) ) {
1190          return $title;
1191      }
1192  
1193      global $page, $paged;
1194  
1195      $title = array(
1196          'title' => '',
1197      );
1198  
1199      // If it's a 404 page, use a "Page not found" title.
1200      if ( is_404() ) {
1201          $title['title'] = __( 'Page not found' );
1202  
1203          // If it's a search, use a dynamic search results title.
1204      } elseif ( is_search() ) {
1205          /* translators: %s: Search query. */
1206          $title['title'] = sprintf( __( 'Search Results for &#8220;%s&#8221;' ), get_search_query() );
1207  
1208          // If on the front page, use the site title.
1209      } elseif ( is_front_page() ) {
1210          $title['title'] = get_bloginfo( 'name', 'display' );
1211  
1212          // If on a post type archive, use the post type archive title.
1213      } elseif ( is_post_type_archive() ) {
1214          $title['title'] = post_type_archive_title( '', false );
1215  
1216          // If on a taxonomy archive, use the term title.
1217      } elseif ( is_tax() ) {
1218          $title['title'] = single_term_title( '', false );
1219  
1220          /*
1221          * If we're on the blog page that is not the homepage
1222          * or a single post of any post type, use the post title.
1223          */
1224      } elseif ( is_home() || is_singular() ) {
1225          $title['title'] = single_post_title( '', false );
1226  
1227          // If on a category or tag archive, use the term title.
1228      } elseif ( is_category() || is_tag() ) {
1229          $title['title'] = single_term_title( '', false );
1230  
1231          // If on an author archive, use the author's display name.
1232      } elseif ( is_author() && get_queried_object() ) {
1233          $author         = get_queried_object();
1234          $title['title'] = $author->display_name;
1235  
1236          // If it's a date archive, use the date as the title.
1237      } elseif ( is_year() ) {
1238          $title['title'] = get_the_date( _x( 'Y', 'yearly archives date format' ) );
1239  
1240      } elseif ( is_month() ) {
1241          $title['title'] = get_the_date( _x( 'F Y', 'monthly archives date format' ) );
1242  
1243      } elseif ( is_day() ) {
1244          $title['title'] = get_the_date();
1245      }
1246  
1247      // Add a page number if necessary.
1248      if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() ) {
1249          /* translators: %s: Page number. */
1250          $title['page'] = sprintf( __( 'Page %s' ), max( $paged, $page ) );
1251      }
1252  
1253      // Append the description or site title to give context.
1254      if ( is_front_page() ) {
1255          $title['tagline'] = get_bloginfo( 'description', 'display' );
1256      } else {
1257          $title['site'] = get_bloginfo( 'name', 'display' );
1258      }
1259  
1260      /**
1261       * Filters the separator for the document title.
1262       *
1263       * @since 4.4.0
1264       *
1265       * @param string $sep Document title separator. Default '-'.
1266       */
1267      $sep = apply_filters( 'document_title_separator', '-' );
1268  
1269      /**
1270       * Filters the parts of the document title.
1271       *
1272       * @since 4.4.0
1273       *
1274       * @param array $title {
1275       *     The document title parts.
1276       *
1277       *     @type string $title   Title of the viewed page.
1278       *     @type string $page    Optional. Page number if paginated.
1279       *     @type string $tagline Optional. Site description when on home page.
1280       *     @type string $site    Optional. Site title when not on home page.
1281       * }
1282       */
1283      $title = apply_filters( 'document_title_parts', $title );
1284  
1285      $title = implode( " $sep ", array_filter( $title ) );
1286  
1287      /**
1288       * Filters the document title.
1289       *
1290       * @since 5.8.0
1291       *
1292       * @param string $title Document title.
1293       */
1294      $title = apply_filters( 'document_title', $title );
1295  
1296      return $title;
1297  }
1298  
1299  /**
1300   * Displays title tag with content.
1301   *
1302   * @since 4.1.0
1303   * @since 4.4.0 Improved title output replaced `wp_title()`.
1304   * @access private
1305   */
1306  function _wp_render_title_tag() {
1307      if ( ! current_theme_supports( 'title-tag' ) ) {
1308          return;
1309      }
1310  
1311      echo '<title>' . wp_get_document_title() . '</title>' . "\n";
1312  }
1313  
1314  /**
1315   * Displays or retrieves page title for all areas of blog.
1316   *
1317   * By default, the page title will display the separator before the page title,
1318   * so that the blog title will be before the page title. This is not good for
1319   * title display, since the blog title shows up on most tabs and not what is
1320   * important, which is the page that the user is looking at.
1321   *
1322   * There are also SEO benefits to having the blog title after or to the 'right'
1323   * of the page title. However, it is mostly common sense to have the blog title
1324   * to the right with most browsers supporting tabs. You can achieve this by
1325   * using the seplocation parameter and setting the value to 'right'. This change
1326   * was introduced around 2.5.0, in case backward compatibility of themes is
1327   * important.
1328   *
1329   * @since 1.0.0
1330   *
1331   * @global WP_Locale $wp_locale WordPress date and time locale object.
1332   *
1333   * @param string $sep         Optional. How to separate the various items within the page title.
1334   *                            Default '&raquo;'.
1335   * @param bool   $display     Optional. Whether to display or retrieve title. Default true.
1336   * @param string $seplocation Optional. Location of the separator (either 'left' or 'right').
1337   * @return string|void String when `$display` is false, nothing otherwise.
1338   */
1339  function wp_title( $sep = '&raquo;', $display = true, $seplocation = '' ) {
1340      global $wp_locale;
1341  
1342      $m        = get_query_var( 'm' );
1343      $year     = get_query_var( 'year' );
1344      $monthnum = get_query_var( 'monthnum' );
1345      $day      = get_query_var( 'day' );
1346      $search   = get_query_var( 's' );
1347      $title    = '';
1348  
1349      $t_sep = '%WP_TITLE_SEP%'; // Temporary separator, for accurate flipping, if necessary.
1350  
1351      // If there is a post.
1352      if ( is_single() || ( is_home() && ! is_front_page() ) || ( is_page() && ! is_front_page() ) ) {
1353          $title = single_post_title( '', false );
1354      }
1355  
1356      // If there's a post type archive.
1357      if ( is_post_type_archive() ) {
1358          $post_type = get_query_var( 'post_type' );
1359          if ( is_array( $post_type ) ) {
1360              $post_type = reset( $post_type );
1361          }
1362          $post_type_object = get_post_type_object( $post_type );
1363          if ( ! $post_type_object->has_archive ) {
1364              $title = post_type_archive_title( '', false );
1365          }
1366      }
1367  
1368      // If there's a category or tag.
1369      if ( is_category() || is_tag() ) {
1370          $title = single_term_title( '', false );
1371      }
1372  
1373      // If there's a taxonomy.
1374      if ( is_tax() ) {
1375          $term = get_queried_object();
1376          if ( $term ) {
1377              $tax   = get_taxonomy( $term->taxonomy );
1378              $title = single_term_title( $tax->labels->name . $t_sep, false );
1379          }
1380      }
1381  
1382      // If there's an author.
1383      if ( is_author() && ! is_post_type_archive() ) {
1384          $author = get_queried_object();
1385          if ( $author ) {
1386              $title = $author->display_name;
1387          }
1388      }
1389  
1390      // Post type archives with has_archive should override terms.
1391      if ( is_post_type_archive() && $post_type_object->has_archive ) {
1392          $title = post_type_archive_title( '', false );
1393      }
1394  
1395      // If there's a month.
1396      if ( is_archive() && ! empty( $m ) ) {
1397          $my_year  = substr( $m, 0, 4 );
1398          $my_month = substr( $m, 4, 2 );
1399          $my_day   = (int) substr( $m, 6, 2 );
1400          $title    = $my_year .
1401              ( $my_month ? $t_sep . $wp_locale->get_month( $my_month ) : '' ) .
1402              ( $my_day ? $t_sep . $my_day : '' );
1403      }
1404  
1405      // If there's a year.
1406      if ( is_archive() && ! empty( $year ) ) {
1407          $title = $year;
1408          if ( ! empty( $monthnum ) ) {
1409              $title .= $t_sep . $wp_locale->get_month( $monthnum );
1410          }
1411          if ( ! empty( $day ) ) {
1412              $title .= $t_sep . zeroise( $day, 2 );
1413          }
1414      }
1415  
1416      // If it's a search.
1417      if ( is_search() ) {
1418          /* translators: 1: Separator, 2: Search query. */
1419          $title = sprintf( __( 'Search Results %1$s %2$s' ), $t_sep, strip_tags( $search ) );
1420      }
1421  
1422      // If it's a 404 page.
1423      if ( is_404() ) {
1424          $title = __( 'Page not found' );
1425      }
1426  
1427      $prefix = '';
1428      if ( ! empty( $title ) ) {
1429          $prefix = " $sep ";
1430      }
1431  
1432      /**
1433       * Filters the parts of the page title.
1434       *
1435       * @since 4.0.0
1436       *
1437       * @param string[] $title_array Array of parts of the page title.
1438       */
1439      $title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );
1440  
1441      // Determines position of the separator and direction of the breadcrumb.
1442      if ( 'right' === $seplocation ) { // Separator on right, so reverse the order.
1443          $title_array = array_reverse( $title_array );
1444          $title       = implode( " $sep ", $title_array ) . $prefix;
1445      } else {
1446          $title = $prefix . implode( " $sep ", $title_array );
1447      }
1448  
1449      /**
1450       * Filters the text of the page title.
1451       *
1452       * @since 2.0.0
1453       *
1454       * @param string $title       Page title.
1455       * @param string $sep         Title separator.
1456       * @param string $seplocation Location of the separator (either 'left' or 'right').
1457       */
1458      $title = apply_filters( 'wp_title', $title, $sep, $seplocation );
1459  
1460      // Send it out.
1461      if ( $display ) {
1462          echo $title;
1463      } else {
1464          return $title;
1465      }
1466  }
1467  
1468  /**
1469   * Displays or retrieves page title for post.
1470   *
1471   * This is optimized for single.php template file for displaying the post title.
1472   *
1473   * It does not support placing the separator after the title, but by leaving the
1474   * prefix parameter empty, you can set the title separator manually. The prefix
1475   * does not automatically place a space between the prefix, so if there should
1476   * be a space, the parameter value will need to have it at the end.
1477   *
1478   * @since 0.71
1479   *
1480   * @param string $prefix  Optional. What to display before the title.
1481   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1482   * @return string|void Title when retrieving.
1483   */
1484  function single_post_title( $prefix = '', $display = true ) {
1485      $_post = get_queried_object();
1486  
1487      if ( ! isset( $_post->post_title ) ) {
1488          return;
1489      }
1490  
1491      /**
1492       * Filters the page title for a single post.
1493       *
1494       * @since 0.71
1495       *
1496       * @param string  $_post_title The single post page title.
1497       * @param WP_Post $_post       The current post.
1498       */
1499      $title = apply_filters( 'single_post_title', $_post->post_title, $_post );
1500      if ( $display ) {
1501          echo $prefix . $title;
1502      } else {
1503          return $prefix . $title;
1504      }
1505  }
1506  
1507  /**
1508   * Displays or retrieves title for a post type archive.
1509   *
1510   * This is optimized for archive.php and archive-{$post_type}.php template files
1511   * for displaying the title of the post type.
1512   *
1513   * @since 3.1.0
1514   *
1515   * @param string $prefix  Optional. What to display before the title.
1516   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1517   * @return string|void Title when retrieving, null when displaying or failure.
1518   */
1519  function post_type_archive_title( $prefix = '', $display = true ) {
1520      if ( ! is_post_type_archive() ) {
1521          return;
1522      }
1523  
1524      $post_type = get_query_var( 'post_type' );
1525      if ( is_array( $post_type ) ) {
1526          $post_type = reset( $post_type );
1527      }
1528  
1529      $post_type_obj = get_post_type_object( $post_type );
1530  
1531      /**
1532       * Filters the post type archive title.
1533       *
1534       * @since 3.1.0
1535       *
1536       * @param string $post_type_name Post type 'name' label.
1537       * @param string $post_type      Post type.
1538       */
1539      $title = apply_filters( 'post_type_archive_title', $post_type_obj->labels->name, $post_type );
1540  
1541      if ( $display ) {
1542          echo $prefix . $title;
1543      } else {
1544          return $prefix . $title;
1545      }
1546  }
1547  
1548  /**
1549   * Displays or retrieves page title for category archive.
1550   *
1551   * Useful for category template files for displaying the category page title.
1552   * The prefix does not automatically place a space between the prefix, so if
1553   * there should be a space, the parameter value will need to have it at the end.
1554   *
1555   * @since 0.71
1556   *
1557   * @param string $prefix  Optional. What to display before the title.
1558   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1559   * @return string|void Title when retrieving.
1560   */
1561  function single_cat_title( $prefix = '', $display = true ) {
1562      return single_term_title( $prefix, $display );
1563  }
1564  
1565  /**
1566   * Displays or retrieves page title for tag post archive.
1567   *
1568   * Useful for tag template files for displaying the tag page title. The prefix
1569   * does not automatically place a space between the prefix, so if there should
1570   * be a space, the parameter value will need to have it at the end.
1571   *
1572   * @since 2.3.0
1573   *
1574   * @param string $prefix  Optional. What to display before the title.
1575   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1576   * @return string|void Title when retrieving.
1577   */
1578  function single_tag_title( $prefix = '', $display = true ) {
1579      return single_term_title( $prefix, $display );
1580  }
1581  
1582  /**
1583   * Displays or retrieves page title for taxonomy term archive.
1584   *
1585   * Useful for taxonomy term template files for displaying the taxonomy term page title.
1586   * The prefix does not automatically place a space between the prefix, so if there should
1587   * be a space, the parameter value will need to have it at the end.
1588   *
1589   * @since 3.1.0
1590   *
1591   * @param string $prefix  Optional. What to display before the title.
1592   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1593   * @return string|void Title when retrieving.
1594   */
1595  function single_term_title( $prefix = '', $display = true ) {
1596      $term = get_queried_object();
1597  
1598      if ( ! $term ) {
1599          return;
1600      }
1601  
1602      if ( is_category() ) {
1603          /**
1604           * Filters the category archive page title.
1605           *
1606           * @since 2.0.10
1607           *
1608           * @param string $term_name Category name for archive being displayed.
1609           */
1610          $term_name = apply_filters( 'single_cat_title', $term->name );
1611      } elseif ( is_tag() ) {
1612          /**
1613           * Filters the tag archive page title.
1614           *
1615           * @since 2.3.0
1616           *
1617           * @param string $term_name Tag name for archive being displayed.
1618           */
1619          $term_name = apply_filters( 'single_tag_title', $term->name );
1620      } elseif ( is_tax() ) {
1621          /**
1622           * Filters the custom taxonomy archive page title.
1623           *
1624           * @since 3.1.0
1625           *
1626           * @param string $term_name Term name for archive being displayed.
1627           */
1628          $term_name = apply_filters( 'single_term_title', $term->name );
1629      } else {
1630          return;
1631      }
1632  
1633      if ( empty( $term_name ) ) {
1634          return;
1635      }
1636  
1637      if ( $display ) {
1638          echo $prefix . $term_name;
1639      } else {
1640          return $prefix . $term_name;
1641      }
1642  }
1643  
1644  /**
1645   * Displays or retrieves page title for post archive based on date.
1646   *
1647   * Useful for when the template only needs to display the month and year,
1648   * if either are available. The prefix does not automatically place a space
1649   * between the prefix, so if there should be a space, the parameter value
1650   * will need to have it at the end.
1651   *
1652   * @since 0.71
1653   *
1654   * @global WP_Locale $wp_locale WordPress date and time locale object.
1655   *
1656   * @param string $prefix  Optional. What to display before the title.
1657   * @param bool   $display Optional. Whether to display or retrieve title. Default true.
1658   * @return string|false|void False if there's no valid title for the month. Title when retrieving.
1659   */
1660  function single_month_title( $prefix = '', $display = true ) {
1661      global $wp_locale;
1662  
1663      $m        = get_query_var( 'm' );
1664      $year     = get_query_var( 'year' );
1665      $monthnum = get_query_var( 'monthnum' );
1666  
1667      if ( ! empty( $monthnum ) && ! empty( $year ) ) {
1668          $my_year  = $year;
1669          $my_month = $wp_locale->get_month( $monthnum );
1670      } elseif ( ! empty( $m ) ) {
1671          $my_year  = substr( $m, 0, 4 );
1672          $my_month = $wp_locale->get_month( substr( $m, 4, 2 ) );
1673      }
1674  
1675      if ( empty( $my_month ) ) {
1676          return false;
1677      }
1678  
1679      $result = $prefix . $my_month . $prefix . $my_year;
1680  
1681      if ( ! $display ) {
1682          return $result;
1683      }
1684      echo $result;
1685  }
1686  
1687  /**
1688   * Displays the archive title based on the queried object.
1689   *
1690   * @since 4.1.0
1691   *
1692   * @see get_the_archive_title()
1693   *
1694   * @param string $before Optional. Content to prepend to the title. Default empty.
1695   * @param string $after  Optional. Content to append to the title. Default empty.
1696   */
1697  function the_archive_title( $before = '', $after = '' ) {
1698      $title = get_the_archive_title();
1699  
1700      if ( ! empty( $title ) ) {
1701          echo $before . $title . $after;
1702      }
1703  }
1704  
1705  /**
1706   * Retrieves the archive title based on the queried object.
1707   *
1708   * @since 4.1.0
1709   * @since 5.5.0 The title part is wrapped in a `<span>` element.
1710   *
1711   * @return string Archive title.
1712   */
1713  function get_the_archive_title() {
1714      $title  = __( 'Archives' );
1715      $prefix = '';
1716  
1717      if ( is_category() ) {
1718          $title  = single_cat_title( '', false );
1719          $prefix = _x( 'Category:', 'category archive title prefix' );
1720      } elseif ( is_tag() ) {
1721          $title  = single_tag_title( '', false );
1722          $prefix = _x( 'Tag:', 'tag archive title prefix' );
1723      } elseif ( is_author() ) {
1724          $title  = get_the_author();
1725          $prefix = _x( 'Author:', 'author archive title prefix' );
1726      } elseif ( is_year() ) {
1727          /* translators: See https://www.php.net/manual/datetime.format.php */
1728          $title  = get_the_date( _x( 'Y', 'yearly archives date format' ) );
1729          $prefix = _x( 'Year:', 'date archive title prefix' );
1730      } elseif ( is_month() ) {
1731          /* translators: See https://www.php.net/manual/datetime.format.php */
1732          $title  = get_the_date( _x( 'F Y', 'monthly archives date format' ) );
1733          $prefix = _x( 'Month:', 'date archive title prefix' );
1734      } elseif ( is_day() ) {
1735          /* translators: See https://www.php.net/manual/datetime.format.php */
1736          $title  = get_the_date( _x( 'F j, Y', 'daily archives date format' ) );
1737          $prefix = _x( 'Day:', 'date archive title prefix' );
1738      } elseif ( is_tax( 'post_format' ) ) {
1739          if ( is_tax( 'post_format', 'post-format-aside' ) ) {
1740              $title = _x( 'Asides', 'post format archive title' );
1741          } elseif ( is_tax( 'post_format', 'post-format-gallery' ) ) {
1742              $title = _x( 'Galleries', 'post format archive title' );
1743          } elseif ( is_tax( 'post_format', 'post-format-image' ) ) {
1744              $title = _x( 'Images', 'post format archive title' );
1745          } elseif ( is_tax( 'post_format', 'post-format-video' ) ) {
1746              $title = _x( 'Videos', 'post format archive title' );
1747          } elseif ( is_tax( 'post_format', 'post-format-quote' ) ) {
1748              $title = _x( 'Quotes', 'post format archive title' );
1749          } elseif ( is_tax( 'post_format', 'post-format-link' ) ) {
1750              $title = _x( 'Links', 'post format archive title' );
1751          } elseif ( is_tax( 'post_format', 'post-format-status' ) ) {
1752              $title = _x( 'Statuses', 'post format archive title' );
1753          } elseif ( is_tax( 'post_format', 'post-format-audio' ) ) {
1754              $title = _x( 'Audio', 'post format archive title' );
1755          } elseif ( is_tax( 'post_format', 'post-format-chat' ) ) {
1756              $title = _x( 'Chats', 'post format archive title' );
1757          }
1758      } elseif ( is_post_type_archive() ) {
1759          $title  = post_type_archive_title( '', false );
1760          $prefix = _x( 'Archives:', 'post type archive title prefix' );
1761      } elseif ( is_tax() ) {
1762          $queried_object = get_queried_object();
1763          if ( $queried_object ) {
1764              $tax    = get_taxonomy( $queried_object->taxonomy );
1765              $title  = single_term_title( '', false );
1766              $prefix = sprintf(
1767                  /* translators: %s: Taxonomy singular name. */
1768                  _x( '%s:', 'taxonomy term archive title prefix' ),
1769                  $tax->labels->singular_name
1770              );
1771          }
1772      }
1773  
1774      $original_title = $title;
1775  
1776      /**
1777       * Filters the archive title prefix.
1778       *
1779       * @since 5.5.0
1780       *
1781       * @param string $prefix Archive title prefix.
1782       */
1783      $prefix = apply_filters( 'get_the_archive_title_prefix', $prefix );
1784      if ( $prefix ) {
1785          $title = sprintf(
1786              /* translators: 1: Title prefix. 2: Title. */
1787              _x( '%1$s %2$s', 'archive title' ),
1788              $prefix,
1789              '<span>' . $title . '</span>'
1790          );
1791      }
1792  
1793      /**
1794       * Filters the archive title.
1795       *
1796       * @since 4.1.0
1797       * @since 5.5.0 Added the `$prefix` and `$original_title` parameters.
1798       *
1799       * @param string $title          Archive title to be displayed.
1800       * @param string $original_title Archive title without prefix.
1801       * @param string $prefix         Archive title prefix.
1802       */
1803      return apply_filters( 'get_the_archive_title', $title, $original_title, $prefix );
1804  }
1805  
1806  /**
1807   * Displays category, tag, term, or author description.
1808   *
1809   * @since 4.1.0
1810   *
1811   * @see get_the_archive_description()
1812   *
1813   * @param string $before Optional. Content to prepend to the description. Default empty.
1814   * @param string $after  Optional. Content to append to the description. Default empty.
1815   */
1816  function the_archive_description( $before = '', $after = '' ) {
1817      $description = get_the_archive_description();
1818      if ( $description ) {
1819          echo $before . $description . $after;
1820      }
1821  }
1822  
1823  /**
1824   * Retrieves the description for an author, post type, or term archive.
1825   *
1826   * @since 4.1.0
1827   * @since 4.7.0 Added support for author archives.
1828   * @since 4.9.0 Added support for post type archives.
1829   *
1830   * @see term_description()
1831   *
1832   * @return string Archive description.
1833   */
1834  function get_the_archive_description() {
1835      if ( is_author() ) {
1836          $description = get_the_author_meta( 'description' );
1837      } elseif ( is_post_type_archive() ) {
1838          $description = get_the_post_type_description();
1839      } else {
1840          $description = term_description();
1841      }
1842  
1843      /**
1844       * Filters the archive description.
1845       *
1846       * @since 4.1.0
1847       *
1848       * @param string $description Archive description to be displayed.
1849       */
1850      return apply_filters( 'get_the_archive_description', $description );
1851  }
1852  
1853  /**
1854   * Retrieves the description for a post type archive.
1855   *
1856   * @since 4.9.0
1857   *
1858   * @return string The post type description.
1859   */
1860  function get_the_post_type_description() {
1861      $post_type = get_query_var( 'post_type' );
1862  
1863      if ( is_array( $post_type ) ) {
1864          $post_type = reset( $post_type );
1865      }
1866  
1867      $post_type_obj = get_post_type_object( $post_type );
1868  
1869      // Check if a description is set.
1870      if ( isset( $post_type_obj->description ) ) {
1871          $description = $post_type_obj->description;
1872      } else {
1873          $description = '';
1874      }
1875  
1876      /**
1877       * Filters the description for a post type archive.
1878       *
1879       * @since 4.9.0
1880       *
1881       * @param string       $description   The post type description.
1882       * @param WP_Post_Type $post_type_obj The post type object.
1883       */
1884      return apply_filters( 'get_the_post_type_description', $description, $post_type_obj );
1885  }
1886  
1887  /**
1888   * Retrieves archive link content based on predefined or custom code.
1889   *
1890   * The format can be one of four styles. The 'link' for head element, 'option'
1891   * for use in the select element, 'html' for use in list (either ol or ul HTML
1892   * elements). Custom content is also supported using the before and after
1893   * parameters.
1894   *
1895   * The 'link' format uses the `<link>` HTML element with the **archives**
1896   * relationship. The before and after parameters are not used. The text
1897   * parameter is used to describe the link.
1898   *
1899   * The 'option' format uses the option HTML element for use in select element.
1900   * The value is the url parameter and the before and after parameters are used
1901   * between the text description.
1902   *
1903   * The 'html' format, which is the default, uses the li HTML element for use in
1904   * the list HTML elements. The before parameter is before the link and the after
1905   * parameter is after the closing link.
1906   *
1907   * The custom format uses the before parameter before the link ('a' HTML
1908   * element) and the after parameter after the closing link tag. If the above
1909   * three values for the format are not used, then custom format is assumed.
1910   *
1911   * @since 1.0.0
1912   * @since 5.2.0 Added the `$selected` parameter.
1913   *
1914   * @param string $url      URL to archive.
1915   * @param string $text     Archive text description.
1916   * @param string $format   Optional. Can be 'link', 'option', 'html', or custom. Default 'html'.
1917   * @param string $before   Optional. Content to prepend to the description. Default empty.
1918   * @param string $after    Optional. Content to append to the description. Default empty.
1919   * @param bool   $selected Optional. Set to true if the current page is the selected archive page.
1920   * @return string HTML link content for archive.
1921   */
1922  function get_archives_link( $url, $text, $format = 'html', $before = '', $after = '', $selected = false ) {
1923      $text         = wptexturize( $text );
1924      $url          = esc_url( $url );
1925      $aria_current = $selected ? ' aria-current="page"' : '';
1926  
1927      if ( 'link' === $format ) {
1928          $link_html = "\t<link rel='archives' title='" . esc_attr( $text ) . "' href='$url' />\n";
1929      } elseif ( 'option' === $format ) {
1930          $selected_attr = $selected ? " selected='selected'" : '';
1931          $link_html     = "\t<option value='$url'$selected_attr>$before $text $after</option>\n";
1932      } elseif ( 'html' === $format ) {
1933          $link_html = "\t<li>$before<a href='$url'$aria_current>$text</a>$after</li>\n";
1934      } else { // Custom.
1935          $link_html = "\t$before<a href='$url'$aria_current>$text</a>$after\n";
1936      }
1937  
1938      /**
1939       * Filters the archive link content.
1940       *
1941       * @since 2.6.0
1942       * @since 4.5.0 Added the `$url`, `$text`, `$format`, `$before`, and `$after` parameters.
1943       * @since 5.2.0 Added the `$selected` parameter.
1944       *
1945       * @param string $link_html The archive HTML link content.
1946       * @param string $url       URL to archive.
1947       * @param string $text      Archive text description.
1948       * @param string $format    Link format. Can be 'link', 'option', 'html', or custom.
1949       * @param string $before    Content to prepend to the description.
1950       * @param string $after     Content to append to the description.
1951       * @param bool   $selected  True if the current page is the selected archive.
1952       */
1953      return apply_filters( 'get_archives_link', $link_html, $url, $text, $format, $before, $after, $selected );
1954  }
1955  
1956  /**
1957   * Displays archive links based on type and format.
1958   *
1959   * @since 1.2.0
1960   * @since 4.4.0 The `$post_type` argument was added.
1961   * @since 5.2.0 The `$year`, `$monthnum`, `$day`, and `$w` arguments were added.
1962   *
1963   * @see get_archives_link()
1964   *
1965   * @global wpdb      $wpdb      WordPress database abstraction object.
1966   * @global WP_Locale $wp_locale WordPress date and time locale object.
1967   *
1968   * @param string|array $args {
1969   *     Default archive links arguments. Optional.
1970   *
1971   *     @type string     $type            Type of archive to retrieve. Accepts 'daily', 'weekly', 'monthly',
1972   *                                       'yearly', 'postbypost', or 'alpha'. Both 'postbypost' and 'alpha'
1973   *                                       display the same archive link list as well as post titles instead
1974   *                                       of displaying dates. The difference between the two is that 'alpha'
1975   *                                       will order by post title and 'postbypost' will order by post date.
1976   *                                       Default 'monthly'.
1977   *     @type string|int $limit           Number of links to limit the query to. Default empty (no limit).
1978   *     @type string     $format          Format each link should take using the $before and $after args.
1979   *                                       Accepts 'link' (`<link>` tag), 'option' (`<option>` tag), 'html'
1980   *                                       (`<li>` tag), or a custom format, which generates a link anchor
1981   *                                       with $before preceding and $after succeeding. Default 'html'.
1982   *     @type string     $before          Markup to prepend to the beginning of each link. Default empty.
1983   *     @type string     $after           Markup to append to the end of each link. Default empty.
1984   *     @type bool       $show_post_count Whether to display the post count alongside the link. Default false.
1985   *     @type bool|int   $echo            Whether to echo or return the links list. Default 1|true to echo.
1986   *     @type string     $order           Whether to use ascending or descending order. Accepts 'ASC', or 'DESC'.
1987   *                                       Default 'DESC'.
1988   *     @type string     $post_type       Post type. Default 'post'.
1989   *     @type string     $year            Year. Default current year.
1990   *     @type string     $monthnum        Month number. Default current month number.
1991   *     @type string     $day             Day. Default current day.
1992   *     @type string     $w               Week. Default current week.
1993   * }
1994   * @return void|string Void if 'echo' argument is true, archive links if 'echo' is false.
1995   */
1996  function wp_get_archives( $args = '' ) {
1997      global $wpdb, $wp_locale;
1998  
1999      $defaults = array(
2000          'type'            => 'monthly',
2001          'limit'           => '',
2002          'format'          => 'html',
2003          'before'          => '',
2004          'after'           => '',
2005          'show_post_count' => false,
2006          'echo'            => 1,
2007          'order'           => 'DESC',
2008          'post_type'       => 'post',
2009          'year'            => get_query_var( 'year' ),
2010          'monthnum'        => get_query_var( 'monthnum' ),
2011          'day'             => get_query_var( 'day' ),
2012          'w'               => get_query_var( 'w' ),
2013      );
2014  
2015      $parsed_args = wp_parse_args( $args, $defaults );
2016  
2017      $post_type_object = get_post_type_object( $parsed_args['post_type'] );
2018      if ( ! is_post_type_viewable( $post_type_object ) ) {
2019          return;
2020      }
2021  
2022      $parsed_args['post_type'] = $post_type_object->name;
2023  
2024      if ( '' === $parsed_args['type'] ) {
2025          $parsed_args['type'] = 'monthly';
2026      }
2027  
2028      if ( ! empty( $parsed_args['limit'] ) ) {
2029          $parsed_args['limit'] = absint( $parsed_args['limit'] );
2030          $parsed_args['limit'] = ' LIMIT ' . $parsed_args['limit'];
2031      }
2032  
2033      $order = strtoupper( $parsed_args['order'] );
2034      if ( 'ASC' !== $order ) {
2035          $order = 'DESC';
2036      }
2037  
2038      // This is what will separate dates on weekly archive links.
2039      $archive_week_separator = '&#8211;';
2040  
2041      $sql_where = $wpdb->prepare( "WHERE post_type = %s AND post_status = 'publish'", $parsed_args['post_type'] );
2042  
2043      /**
2044       * Filters the SQL WHERE clause for retrieving archives.
2045       *
2046       * @since 2.2.0
2047       *
2048       * @param string $sql_where   Portion of SQL query containing the WHERE clause.
2049       * @param array  $parsed_args An array of default arguments.
2050       */
2051      $where = apply_filters( 'getarchives_where', $sql_where, $parsed_args );
2052  
2053      /**
2054       * Filters the SQL JOIN clause for retrieving archives.
2055       *
2056       * @since 2.2.0
2057       *
2058       * @param string $sql_join    Portion of SQL query containing JOIN clause.
2059       * @param array  $parsed_args An array of default arguments.
2060       */
2061      $join = apply_filters( 'getarchives_join', '', $parsed_args );
2062  
2063      $output = '';
2064  
2065      $last_changed = wp_cache_get_last_changed( 'posts' );
2066  
2067      $limit = $parsed_args['limit'];
2068  
2069      if ( 'monthly' === $parsed_args['type'] ) {
2070          $query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date $order $limit";
2071          $key     = md5( $query );
2072          $key     = "wp_get_archives:$key:$last_changed";
2073          $results = wp_cache_get( $key, 'post-queries' );
2074          if ( ! $results ) {
2075              $results = $wpdb->get_results( $query );
2076              wp_cache_set( $key, $results, 'post-queries' );
2077          }
2078          if ( $results ) {
2079              $after = $parsed_args['after'];
2080              foreach ( (array) $results as $result ) {
2081                  $url = get_month_link( $result->year, $result->month );
2082                  if ( 'post' !== $parsed_args['post_type'] ) {
2083                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2084                  }
2085                  /* translators: 1: Month name, 2: 4-digit year. */
2086                  $text = sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $result->month ), $result->year );
2087                  if ( $parsed_args['show_post_count'] ) {
2088                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2089                  }
2090                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year && (string) $parsed_args['monthnum'] === $result->month;
2091                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2092              }
2093          }
2094      } elseif ( 'yearly' === $parsed_args['type'] ) {
2095          $query   = "SELECT YEAR(post_date) AS `year`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date) ORDER BY post_date $order $limit";
2096          $key     = md5( $query );
2097          $key     = "wp_get_archives:$key:$last_changed";
2098          $results = wp_cache_get( $key, 'post-queries' );
2099          if ( ! $results ) {
2100              $results = $wpdb->get_results( $query );
2101              wp_cache_set( $key, $results, 'post-queries' );
2102          }
2103          if ( $results ) {
2104              $after = $parsed_args['after'];
2105              foreach ( (array) $results as $result ) {
2106                  $url = get_year_link( $result->year );
2107                  if ( 'post' !== $parsed_args['post_type'] ) {
2108                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2109                  }
2110                  $text = sprintf( '%d', $result->year );
2111                  if ( $parsed_args['show_post_count'] ) {
2112                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2113                  }
2114                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year;
2115                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2116              }
2117          }
2118      } elseif ( 'daily' === $parsed_args['type'] ) {
2119          $query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, DAYOFMONTH(post_date) AS `dayofmonth`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date), DAYOFMONTH(post_date) ORDER BY post_date $order $limit";
2120          $key     = md5( $query );
2121          $key     = "wp_get_archives:$key:$last_changed";
2122          $results = wp_cache_get( $key, 'post-queries' );
2123          if ( ! $results ) {
2124              $results = $wpdb->get_results( $query );
2125              wp_cache_set( $key, $results, 'post-queries' );
2126          }
2127          if ( $results ) {
2128              $after = $parsed_args['after'];
2129              foreach ( (array) $results as $result ) {
2130                  $url = get_day_link( $result->year, $result->month, $result->dayofmonth );
2131                  if ( 'post' !== $parsed_args['post_type'] ) {
2132                      $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2133                  }
2134                  $date = sprintf( '%1$d-%2$02d-%3$02d 00:00:00', $result->year, $result->month, $result->dayofmonth );
2135                  $text = mysql2date( get_option( 'date_format' ), $date );
2136                  if ( $parsed_args['show_post_count'] ) {
2137                      $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2138                  }
2139                  $selected = is_archive() && (string) $parsed_args['year'] === $result->year && (string) $parsed_args['monthnum'] === $result->month && (string) $parsed_args['day'] === $result->dayofmonth;
2140                  $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2141              }
2142          }
2143      } elseif ( 'weekly' === $parsed_args['type'] ) {
2144          $week    = _wp_mysql_week( '`post_date`' );
2145          $query   = "SELECT DISTINCT $week AS `week`, YEAR( `post_date` ) AS `yr`, DATE_FORMAT( `post_date`, '%Y-%m-%d' ) AS `yyyymmdd`, count( `ID` ) AS `posts` FROM `$wpdb->posts` $join $where GROUP BY $week, YEAR( `post_date` ) ORDER BY `post_date` $order $limit";
2146          $key     = md5( $query );
2147          $key     = "wp_get_archives:$key:$last_changed";
2148          $results = wp_cache_get( $key, 'post-queries' );
2149          if ( ! $results ) {
2150              $results = $wpdb->get_results( $query );
2151              wp_cache_set( $key, $results, 'post-queries' );
2152          }
2153          $arc_w_last = '';
2154          if ( $results ) {
2155              $after = $parsed_args['after'];
2156              foreach ( (array) $results as $result ) {
2157                  if ( $result->week !== $arc_w_last ) {
2158                      $arc_year       = $result->yr;
2159                      $arc_w_last     = $result->week;
2160                      $arc_week       = get_weekstartend( $result->yyyymmdd, get_option( 'start_of_week' ) );
2161                      $arc_week_start = date_i18n( get_option( 'date_format' ), $arc_week['start'] );
2162                      $arc_week_end   = date_i18n( get_option( 'date_format' ), $arc_week['end'] );
2163                      $url            = add_query_arg(
2164                          array(
2165                              'm' => $arc_year,
2166                              'w' => $result->week,
2167                          ),
2168                          home_url( '/' )
2169                      );
2170                      if ( 'post' !== $parsed_args['post_type'] ) {
2171                          $url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
2172                      }
2173                      $text = $arc_week_start . $archive_week_separator . $arc_week_end;
2174                      if ( $parsed_args['show_post_count'] ) {
2175                          $parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
2176                      }
2177                      $selected = is_archive() && (string) $parsed_args['year'] === $result->yr && (string) $parsed_args['w'] === $result->week;
2178                      $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2179                  }
2180              }
2181          }
2182      } elseif ( ( 'postbypost' === $parsed_args['type'] ) || ( 'alpha' === $parsed_args['type'] ) ) {
2183          $orderby = ( 'alpha' === $parsed_args['type'] ) ? 'post_title ASC ' : 'post_date DESC, ID DESC ';
2184          $query   = "SELECT * FROM $wpdb->posts $join $where ORDER BY $orderby $limit";
2185          $key     = md5( $query );
2186          $key     = "wp_get_archives:$key:$last_changed";
2187          $results = wp_cache_get( $key, 'post-queries' );
2188          if ( ! $results ) {
2189              $results = $wpdb->get_results( $query );
2190              wp_cache_set( $key, $results, 'post-queries' );
2191          }
2192          if ( $results ) {
2193              foreach ( (array) $results as $result ) {
2194                  if ( '0000-00-00 00:00:00' !== $result->post_date ) {
2195                      $url = get_permalink( $result );
2196                      if ( $result->post_title ) {
2197                          /** This filter is documented in wp-includes/post-template.php */
2198                          $text = strip_tags( apply_filters( 'the_title', $result->post_title, $result->ID ) );
2199                      } else {
2200                          $text = $result->ID;
2201                      }
2202                      $selected = get_the_ID() === $result->ID;
2203                      $output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
2204                  }
2205              }
2206          }
2207      }
2208  
2209      if ( $parsed_args['echo'] ) {
2210          echo $output;
2211      } else {
2212          return $output;
2213      }
2214  }
2215  
2216  /**
2217   * Gets number of days since the start of the week.
2218   *
2219   * @since 1.5.0
2220   *
2221   * @param int $num Number of day.
2222   * @return float Days since the start of the week.
2223   */
2224  function calendar_week_mod( $num ) {
2225      $base = 7;
2226      return ( $num - $base * floor( $num / $base ) );
2227  }
2228  
2229  /**
2230   * Displays calendar with days that have posts as links.
2231   *
2232   * The calendar is cached, which will be retrieved, if it exists. If there are
2233   * no posts for the month, then it will not be displayed.
2234   *
2235   * @since 1.0.0
2236   * @since 6.8.0 Added the `$args` parameter, with backward compatibility
2237   *              for the replaced `$initial` and `$display` parameters.
2238   *
2239   * @global wpdb      $wpdb      WordPress database abstraction object.
2240   * @global int       $m
2241   * @global int       $monthnum
2242   * @global int       $year
2243   * @global WP_Locale $wp_locale WordPress date and time locale object.
2244   * @global array     $posts
2245   *
2246   * @param array $args {
2247   *     Optional. Arguments for the `get_calendar` function.
2248   *
2249   *     @type bool   $initial   Whether to use initial calendar names. Default true.
2250   *     @type bool   $display   Whether to display the calendar output. Default true.
2251   *     @type string $post_type Optional. Post type. Default 'post'.
2252   * }
2253   * @return void|string Void if `$display` argument is true, calendar HTML if `$display` is false.
2254   */
2255  function get_calendar( $args = array() ) {
2256      global $wpdb, $m, $monthnum, $year, $wp_locale, $posts;
2257  
2258      $defaults = array(
2259          'initial'   => true,
2260          'display'   => true,
2261          'post_type' => 'post',
2262      );
2263  
2264      $original_args = func_get_args();
2265      $args          = array();
2266  
2267      if ( ! empty( $original_args ) ) {
2268          if ( ! is_array( $original_args[0] ) ) {
2269              if ( isset( $original_args[0] ) && is_bool( $original_args[0] ) ) {
2270                  $defaults['initial'] = $original_args[0];
2271              }
2272              if ( isset( $original_args[1] ) && is_bool( $original_args[1] ) ) {
2273                  $defaults['display'] = $original_args[1];
2274              }
2275          } else {
2276              $args = $original_args[0];
2277          }
2278      }
2279  
2280      /**
2281       * Filter the `get_calendar` function arguments before they are used.
2282       *
2283       * @since 6.8.0
2284       *
2285       * @param array $args {
2286       *     Optional. Arguments for the `get_calendar` function.
2287       *
2288       *     @type bool   $initial   Whether to use initial calendar names. Default true.
2289       *     @type bool   $display   Whether to display the calendar output. Default true.
2290       *     @type string $post_type Optional. Post type. Default 'post'.
2291       * }
2292       * @return array The arguments for the `get_calendar` function.
2293       */
2294      $args = apply_filters( 'get_calendar_args', wp_parse_args( $args, $defaults ) );
2295  
2296      if ( ! post_type_exists( $args['post_type'] ) ) {
2297          $args['post_type'] = 'post';
2298      }
2299  
2300      $w = 0;
2301      if ( isset( $_GET['w'] ) ) {
2302          $w = (int) $_GET['w'];
2303      }
2304  
2305      /*
2306       * Normalize the cache key.
2307       *
2308       * The following ensures the same cache key is used for the same parameter
2309       * and parameter equivalents. This prevents `post_type > post, initial > true`
2310       * from generating a different key from the same values in the reverse order.
2311       *
2312       * `display` is excluded from the cache key as the cache contains the same
2313       * HTML regardless of this function's need to echo or return the output.
2314       *
2315       * The global values contain data generated by the URL query string variables.
2316       */
2317      $cache_args = $args;
2318      unset( $cache_args['display'] );
2319  
2320      $cache_args['globals'] = array(
2321          'm'        => $m,
2322          'monthnum' => $monthnum,
2323          'year'     => $year,
2324          'week'     => $w,
2325      );
2326  
2327      wp_recursive_ksort( $cache_args );
2328      $key   = md5( serialize( $cache_args ) );
2329      $cache = wp_cache_get( 'get_calendar', 'calendar' );
2330  
2331      if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) {
2332          /** This filter is documented in wp-includes/general-template.php */
2333          $output = apply_filters( 'get_calendar', $cache[ $key ], $args );
2334  
2335          if ( $args['display'] ) {
2336              echo $output;
2337              return;
2338          }
2339  
2340          return $output;
2341      }
2342  
2343      if ( ! is_array( $cache ) ) {
2344          $cache = array();
2345      }
2346  
2347      $post_type = $args['post_type'];
2348  
2349      // Quick check. If we have no posts at all, abort!
2350      if ( ! $posts ) {
2351          $gotsome = $wpdb->get_var(
2352              $wpdb->prepare(
2353                  "SELECT 1 as test
2354                  FROM $wpdb->posts
2355                  WHERE post_type = %s
2356                  AND post_status = 'publish'
2357                  LIMIT 1",
2358                  $post_type
2359              )
2360          );
2361  
2362          if ( ! $gotsome ) {
2363              $cache[ $key ] = '';
2364              wp_cache_set( 'get_calendar', $cache, 'calendar' );
2365              return;
2366          }
2367      }
2368  
2369      // week_begins = 0 stands for Sunday.
2370      $week_begins = (int) get_option( 'start_of_week' );
2371  
2372      // Let's figure out when we are.
2373      if ( ! empty( $monthnum ) && ! empty( $year ) ) {
2374          $thismonth = (int) $monthnum;
2375          $thisyear  = (int) $year;
2376      } elseif ( ! empty( $w ) ) {
2377          // We need to get the month from MySQL.
2378          $thisyear = (int) substr( $m, 0, 4 );
2379          // It seems MySQL's weeks disagree with PHP's.
2380          $d         = ( ( $w - 1 ) * 7 ) + 6;
2381          $thismonth = (int) $wpdb->get_var(
2382              $wpdb->prepare(
2383                  "SELECT DATE_FORMAT((DATE_ADD('%d0101', INTERVAL %d DAY) ), '%%m')",
2384                  $thisyear,
2385                  $d
2386              )
2387          );
2388      } elseif ( ! empty( $m ) ) {
2389          $thisyear = (int) substr( $m, 0, 4 );
2390          if ( strlen( $m ) < 6 ) {
2391              $thismonth = 1;
2392          } else {
2393              $thismonth = (int) substr( $m, 4, 2 );
2394          }
2395      } else {
2396          $thisyear  = (int) current_time( 'Y' );
2397          $thismonth = (int) current_time( 'm' );
2398      }
2399  
2400      $unixmonth = mktime( 0, 0, 0, $thismonth, 1, $thisyear );
2401      $last_day  = gmdate( 't', $unixmonth );
2402  
2403      // Get the next and previous month and year with at least one post.
2404      $previous = $wpdb->get_row(
2405          $wpdb->prepare(
2406              "SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
2407              FROM $wpdb->posts
2408              WHERE post_date < '%d-%d-01'
2409              AND post_type = %s AND post_status = 'publish'
2410              ORDER BY post_date DESC
2411              LIMIT 1",
2412              $thisyear,
2413              zeroise( $thismonth, 2 ),
2414              $post_type
2415          )
2416      );
2417  
2418      $next = $wpdb->get_row(
2419          $wpdb->prepare(
2420              "SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
2421              FROM $wpdb->posts
2422              WHERE post_date > '%d-%d-%d 23:59:59'
2423              AND post_type = %s AND post_status = 'publish'
2424              ORDER BY post_date ASC
2425              LIMIT 1",
2426              $thisyear,
2427              zeroise( $thismonth, 2 ),
2428              $last_day,
2429              $post_type
2430          )
2431      );
2432  
2433      /* translators: Calendar caption: 1: Month name, 2: 4-digit year. */
2434      $calendar_caption = _x( '%1$s %2$s', 'calendar caption' );
2435      $calendar_output  = '<table id="wp-calendar" class="wp-calendar-table">
2436      <caption>' . sprintf(
2437          $calendar_caption,
2438          $wp_locale->get_month( $thismonth ),
2439          gmdate( 'Y', $unixmonth )
2440      ) . '</caption>
2441      <thead>
2442      <tr>';
2443  
2444      $myweek = array();
2445  
2446      for ( $wdcount = 0; $wdcount <= 6; $wdcount++ ) {
2447          $myweek[] = $wp_locale->get_weekday( ( $wdcount + $week_begins ) % 7 );
2448      }
2449  
2450      foreach ( $myweek as $wd ) {
2451          $day_name         = $args['initial'] ? $wp_locale->get_weekday_initial( $wd ) : $wp_locale->get_weekday_abbrev( $wd );
2452          $wd               = esc_attr( $wd );
2453          $calendar_output .= "\n\t\t<th scope=\"col\" aria-label=\"$wd\">$day_name</th>";
2454      }
2455  
2456      $calendar_output .= '
2457      </tr>
2458      </thead>
2459      <tbody>
2460      <tr>';
2461  
2462      $daywithpost = array();
2463  
2464      // Get days with posts.
2465      $dayswithposts = $wpdb->get_results(
2466          $wpdb->prepare(
2467              "SELECT DISTINCT DAYOFMONTH(post_date)
2468              FROM $wpdb->posts WHERE post_date >= '%d-%d-01 00:00:00'
2469              AND post_type = %s AND post_status = 'publish'
2470              AND post_date <= '%d-%d-%d 23:59:59'",
2471              $thisyear,
2472              zeroise( $thismonth, 2 ),
2473              $post_type,
2474              $thisyear,
2475              zeroise( $thismonth, 2 ),
2476              $last_day
2477          ),
2478          ARRAY_N
2479      );
2480  
2481      if ( $dayswithposts ) {
2482          foreach ( (array) $dayswithposts as $daywith ) {
2483              $daywithpost[] = (int) $daywith[0];
2484          }
2485      }
2486  
2487      // See how much we should pad in the beginning.
2488      $pad = calendar_week_mod( (int) gmdate( 'w', $unixmonth ) - $week_begins );
2489      if ( $pad > 0 ) {
2490          $calendar_output .= "\n\t\t" . '<td colspan="' . esc_attr( $pad ) . '" class="pad">&nbsp;</td>';
2491      }
2492  
2493      $newrow      = false;
2494      $daysinmonth = (int) gmdate( 't', $unixmonth );
2495  
2496      for ( $day = 1; $day <= $daysinmonth; ++$day ) {
2497          if ( isset( $newrow ) && $newrow ) {
2498              $calendar_output .= "\n\t</tr>\n\t<tr>\n\t\t";
2499          }
2500  
2501          $newrow = false;
2502  
2503          if ( (int) current_time( 'j' ) === $day
2504              && (int) current_time( 'm' ) === $thismonth
2505              && (int) current_time( 'Y' ) === $thisyear
2506          ) {
2507              $calendar_output .= '<td id="today">';
2508          } else {
2509              $calendar_output .= '<td>';
2510          }
2511  
2512          if ( in_array( $day, $daywithpost, true ) ) {
2513              // Any posts today?
2514              $date_format = gmdate( _x( 'F j, Y', 'daily archives date format' ), strtotime( "{$thisyear}-{$thismonth}-{$day}" ) );
2515              /* translators: Post calendar label. %s: Date. */
2516              $label            = sprintf( __( 'Posts published on %s' ), $date_format );
2517              $calendar_output .= sprintf(
2518                  '<a href="%s" aria-label="%s">%s</a>',
2519                  get_day_link( $thisyear, $thismonth, $day ),
2520                  esc_attr( $label ),
2521                  $day
2522              );
2523          } else {
2524              $calendar_output .= $day;
2525          }
2526  
2527          $calendar_output .= '</td>';
2528  
2529          if ( 6 === (int) calendar_week_mod( (int) gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins ) ) {
2530              $newrow = true;
2531          }
2532      }
2533  
2534      $pad = 7 - calendar_week_mod( (int) gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins );
2535      if ( 0 < $pad && $pad < 7 ) {
2536          $calendar_output .= "\n\t\t" . '<td class="pad" colspan="' . esc_attr( $pad ) . '">&nbsp;</td>';
2537      }
2538  
2539      $calendar_output .= "\n\t</tr>\n\t</tbody>";
2540  
2541      $calendar_output .= "\n\t</table>";
2542  
2543      $calendar_output .= '<nav aria-label="' . __( 'Previous and next months' ) . '" class="wp-calendar-nav">';
2544  
2545      if ( $previous ) {
2546          $calendar_output .= "\n\t\t" . sprintf(
2547              '<span class="wp-calendar-nav-prev"><a href="%1$s">&laquo; %2$s</a></span>',
2548              get_month_link( $previous->year, $previous->month ),
2549              $wp_locale->get_month_abbrev( $wp_locale->get_month( $previous->month ) )
2550          );
2551      } else {
2552          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev">&nbsp;</span>';
2553      }
2554  
2555      $calendar_output .= "\n\t\t" . '<span class="pad">&nbsp;</span>';
2556  
2557      if ( $next ) {
2558          $calendar_output .= "\n\t\t" . sprintf(
2559              '<span class="wp-calendar-nav-next"><a href="%1$s">%2$s &raquo;</a></span>',
2560              get_month_link( $next->year, $next->month ),
2561              $wp_locale->get_month_abbrev( $wp_locale->get_month( $next->month ) )
2562          );
2563      } else {
2564          $calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next">&nbsp;</span>';
2565      }
2566  
2567      $calendar_output .= '
2568      </nav>';
2569  
2570      $cache[ $key ] = $calendar_output;
2571      wp_cache_set( 'get_calendar', $cache, 'calendar' );
2572  
2573      /**
2574       * Filters the HTML calendar output.
2575       *
2576       * @since 3.0.0
2577       * @since 6.8.0 Added the `$args` parameter.
2578       *
2579       * @param string $calendar_output HTML output of the calendar.
2580       * @param array  $args {
2581       *     Optional. Array of display arguments.
2582       *
2583       *     @type bool   $initial   Whether to use initial calendar names. Default true.
2584       *     @type bool   $display   Whether to display the calendar output. Default true.
2585       *     @type string $post_type Optional. Post type. Default 'post'.
2586       * }
2587       */
2588      $calendar_output = apply_filters( 'get_calendar', $calendar_output, $args );
2589  
2590      if ( $args['display'] ) {
2591          echo $calendar_output;
2592          return;
2593      }
2594  
2595      return $calendar_output;
2596  }
2597  
2598  /**
2599   * Purges the cached results of get_calendar.
2600   *
2601   * @see get_calendar()
2602   * @since 2.1.0
2603   */
2604  function delete_get_calendar_cache() {
2605      wp_cache_delete( 'get_calendar', 'calendar' );
2606  }
2607  
2608  /**
2609   * Displays all of the allowed tags in HTML format with attributes.
2610   *
2611   * This is useful for displaying in the comment area, which elements and
2612   * attributes are supported. As well as any plugins which want to display it.
2613   *
2614   * @since 1.0.1
2615   * @since 4.4.0 No longer used in core.
2616   *
2617   * @global array $allowedtags
2618   *
2619   * @return string HTML allowed tags entity encoded.
2620   */
2621  function allowed_tags() {
2622      global $allowedtags;
2623      $allowed = '';
2624      foreach ( (array) $allowedtags as $tag => $attributes ) {
2625          $allowed .= '<' . $tag;
2626          if ( 0 < count( $attributes ) ) {
2627              foreach ( $attributes as $attribute => $limits ) {
2628                  $allowed .= ' ' . $attribute . '=""';
2629              }
2630          }
2631          $allowed .= '> ';
2632      }
2633      return htmlentities( $allowed );
2634  }
2635  
2636  /***** Date/Time tags */
2637  
2638  /**
2639   * Outputs the date in iso8601 format for xml files.
2640   *
2641   * @since 1.0.0
2642   */
2643  function the_date_xml() {
2644      echo mysql2date( 'Y-m-d', get_post()->post_date, false );
2645  }
2646  
2647  /**
2648   * Displays or retrieves the date of the post (once per date).
2649   *
2650   * Will only output the date if the current post's date is different from the
2651   * previous one output.
2652   *
2653   * i.e. Only one date listing will show per day worth of posts shown in the loop, even if the
2654   * function is called several times for each post.
2655   *
2656   * HTML output can be filtered with {@see 'the_date'}.
2657   * Date string output can be filtered with {@see 'get_the_date'}.
2658   *
2659   * @since 0.71
2660   *
2661   * @global string $currentday  The day of the current post in the loop.
2662   * @global string $previousday The day of the previous post in the loop.
2663   *
2664   * @param string $format  Optional. PHP date format. Defaults to the 'date_format' option.
2665   * @param string $before  Optional. Output before the date. Default empty.
2666   * @param string $after   Optional. Output after the date. Default empty.
2667   * @param bool   $display Optional. Whether to echo the date or return it. Default true.
2668   * @return string|void String if retrieving.
2669   */
2670  function the_date( $format = '', $before = '', $after = '', $display = true ) {
2671      global $currentday, $previousday;
2672  
2673      $the_date = '';
2674  
2675      if ( is_new_day() ) {
2676          $the_date    = $before . get_the_date( $format ) . $after;
2677          $previousday = $currentday;
2678      }
2679  
2680      /**
2681       * Filters the date of the post, for display.
2682       *
2683       * @since 0.71
2684       *
2685       * @param string $the_date The formatted date string.
2686       * @param string $format   PHP date format.
2687       * @param string $before   HTML output before the date.
2688       * @param string $after    HTML output after the date.
2689       */
2690      $the_date = apply_filters( 'the_date', $the_date, $format, $before, $after );
2691  
2692      if ( $display ) {
2693          echo $the_date;
2694      } else {
2695          return $the_date;
2696      }
2697  }
2698  
2699  /**
2700   * Retrieves the date of the post.
2701   *
2702   * Unlike the_date() this function will always return the date.
2703   * Modify output with the {@see 'get_the_date'} filter.
2704   *
2705   * @since 3.0.0
2706   *
2707   * @param string      $format Optional. PHP date format. Defaults to the 'date_format' option.
2708   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
2709   * @return string|int|false Date the current post was written. False on failure.
2710   */
2711  function get_the_date( $format = '', $post = null ) {
2712      $post = get_post( $post );
2713  
2714      if ( ! $post ) {
2715          return false;
2716      }
2717  
2718      $_format = ! empty( $format ) ? $format : get_option( 'date_format' );
2719  
2720      $the_date = get_post_time( $_format, false, $post, true );
2721  
2722      /**
2723       * Filters the date of the post.
2724       *
2725       * @since 3.0.0
2726       *
2727       * @param string|int $the_date Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2728       * @param string     $format   PHP date format.
2729       * @param WP_Post    $post     The post object.
2730       */
2731      return apply_filters( 'get_the_date', $the_date, $format, $post );
2732  }
2733  
2734  /**
2735   * Displays the date on which the post was last modified.
2736   *
2737   * @since 2.1.0
2738   *
2739   * @param string $format  Optional. PHP date format. Defaults to the 'date_format' option.
2740   * @param string $before  Optional. Output before the date. Default empty.
2741   * @param string $after   Optional. Output after the date. Default empty.
2742   * @param bool   $display Optional. Whether to echo the date or return it. Default true.
2743   * @return string|void String if retrieving.
2744   */
2745  function the_modified_date( $format = '', $before = '', $after = '', $display = true ) {
2746      $the_modified_date = $before . get_the_modified_date( $format ) . $after;
2747  
2748      /**
2749       * Filters the date a post was last modified, for display.
2750       *
2751       * @since 2.1.0
2752       *
2753       * @param string $the_modified_date The last modified date.
2754       * @param string $format            PHP date format.
2755       * @param string $before            HTML output before the date.
2756       * @param string $after             HTML output after the date.
2757       */
2758      $the_modified_date = apply_filters( 'the_modified_date', $the_modified_date, $format, $before, $after );
2759  
2760      if ( $display ) {
2761          echo $the_modified_date;
2762      } else {
2763          return $the_modified_date;
2764      }
2765  }
2766  
2767  /**
2768   * Retrieves the date on which the post was last modified.
2769   *
2770   * @since 2.1.0
2771   * @since 4.6.0 Added the `$post` parameter.
2772   *
2773   * @param string      $format Optional. PHP date format. Defaults to the 'date_format' option.
2774   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
2775   * @return string|int|false Date the current post was modified. False on failure.
2776   */
2777  function get_the_modified_date( $format = '', $post = null ) {
2778      $post = get_post( $post );
2779  
2780      if ( ! $post ) {
2781          // For backward compatibility, failures go through the filter below.
2782          $the_time = false;
2783      } else {
2784          $_format = ! empty( $format ) ? $format : get_option( 'date_format' );
2785  
2786          $the_time = get_post_modified_time( $_format, false, $post, true );
2787      }
2788  
2789      /**
2790       * Filters the date a post was last modified.
2791       *
2792       * @since 2.1.0
2793       * @since 4.6.0 Added the `$post` parameter.
2794       *
2795       * @param string|int|false $the_time The formatted date or false if no post is found.
2796       * @param string           $format   PHP date format.
2797       * @param WP_Post|null     $post     WP_Post object or null if no post is found.
2798       */
2799      return apply_filters( 'get_the_modified_date', $the_time, $format, $post );
2800  }
2801  
2802  /**
2803   * Displays the time of the post.
2804   *
2805   * @since 0.71
2806   *
2807   * @param string $format Optional. Format to use for retrieving the time the post
2808   *                       was written. Accepts 'G', 'U', or PHP date format.
2809   *                       Defaults to the 'time_format' option.
2810   */
2811  function the_time( $format = '' ) {
2812      /**
2813       * Filters the time of the post, for display.
2814       *
2815       * @since 0.71
2816       *
2817       * @param string $get_the_time The formatted time.
2818       * @param string $format       Format to use for retrieving the time the post
2819       *                             was written. Accepts 'G', 'U', or PHP date format.
2820       */
2821      echo apply_filters( 'the_time', get_the_time( $format ), $format );
2822  }
2823  
2824  /**
2825   * Retrieves the time of the post.
2826   *
2827   * @since 1.5.0
2828   *
2829   * @param string      $format Optional. Format to use for retrieving the time the post
2830   *                            was written. Accepts 'G', 'U', or PHP date format.
2831   *                            Defaults to the 'time_format' option.
2832   * @param int|WP_Post $post   Post ID or post object. Default is global `$post` object.
2833   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2834   *                          False on failure.
2835   */
2836  function get_the_time( $format = '', $post = null ) {
2837      $post = get_post( $post );
2838  
2839      if ( ! $post ) {
2840          return false;
2841      }
2842  
2843      $_format = ! empty( $format ) ? $format : get_option( 'time_format' );
2844  
2845      $the_time = get_post_time( $_format, false, $post, true );
2846  
2847      /**
2848       * Filters the time of the post.
2849       *
2850       * @since 1.5.0
2851       *
2852       * @param string|int $the_time Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2853       * @param string     $format   Format to use for retrieving the time the post
2854       *                             was written. Accepts 'G', 'U', or PHP date format.
2855       * @param WP_Post    $post     Post object.
2856       */
2857      return apply_filters( 'get_the_time', $the_time, $format, $post );
2858  }
2859  
2860  /**
2861   * Retrieves the localized time of the post.
2862   *
2863   * @since 2.0.0
2864   *
2865   * @param string      $format    Optional. Format to use for retrieving the time the post
2866   *                               was written. Accepts 'G', 'U', or PHP date format. Default 'U'.
2867   * @param bool        $gmt       Optional. Whether to retrieve the GMT time. Default false.
2868   * @param int|WP_Post $post      Post ID or post object. Default is global `$post` object.
2869   * @param bool        $translate Whether to translate the time string. Default false.
2870   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2871   *                          False on failure.
2872   */
2873  function get_post_time( $format = 'U', $gmt = false, $post = null, $translate = false ) {
2874      $post = get_post( $post );
2875  
2876      if ( ! $post ) {
2877          return false;
2878      }
2879  
2880      $source   = ( $gmt ) ? 'gmt' : 'local';
2881      $datetime = get_post_datetime( $post, 'date', $source );
2882  
2883      if ( false === $datetime ) {
2884          return false;
2885      }
2886  
2887      if ( 'U' === $format || 'G' === $format ) {
2888          $time = $datetime->getTimestamp();
2889  
2890          // Returns a sum of timestamp with timezone offset. Ideally should never be used.
2891          if ( ! $gmt ) {
2892              $time += $datetime->getOffset();
2893          }
2894      } elseif ( $translate ) {
2895          $time = wp_date( $format, $datetime->getTimestamp(), $gmt ? new DateTimeZone( 'UTC' ) : null );
2896      } else {
2897          if ( $gmt ) {
2898              $datetime = $datetime->setTimezone( new DateTimeZone( 'UTC' ) );
2899          }
2900  
2901          $time = $datetime->format( $format );
2902      }
2903  
2904      /**
2905       * Filters the localized time of the post.
2906       *
2907       * @since 2.6.0
2908       *
2909       * @param string|int $time   Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
2910       * @param string     $format Format to use for retrieving the date of the post.
2911       *                           Accepts 'G', 'U', or PHP date format.
2912       * @param bool       $gmt    Whether to retrieve the GMT time.
2913       */
2914      return apply_filters( 'get_post_time', $time, $format, $gmt );
2915  }
2916  
2917  /**
2918   * Retrieves post published or modified time as a `DateTimeImmutable` object instance.
2919   *
2920   * The object will be set to the timezone from WordPress settings.
2921   *
2922   * For legacy reasons, this function allows to choose to instantiate from local or UTC time in database.
2923   * Normally this should make no difference to the result. However, the values might get out of sync in database,
2924   * typically because of timezone setting changes. The parameter ensures the ability to reproduce backwards
2925   * compatible behaviors in such cases.
2926   *
2927   * @since 5.3.0
2928   *
2929   * @param int|WP_Post $post   Optional. Post ID or post object. Default is global `$post` object.
2930   * @param string      $field  Optional. Published or modified time to use from database. Accepts 'date' or 'modified'.
2931   *                            Default 'date'.
2932   * @param string      $source Optional. Local or UTC time to use from database. Accepts 'local' or 'gmt'.
2933   *                            Default 'local'.
2934   * @return DateTimeImmutable|false Time object on success, false on failure.
2935   */
2936  function get_post_datetime( $post = null, $field = 'date', $source = 'local' ) {
2937      $post = get_post( $post );
2938  
2939      if ( ! $post ) {
2940          return false;
2941      }
2942  
2943      $wp_timezone = wp_timezone();
2944  
2945      if ( 'gmt' === $source ) {
2946          $time     = ( 'modified' === $field ) ? $post->post_modified_gmt : $post->post_date_gmt;
2947          $timezone = new DateTimeZone( 'UTC' );
2948      } else {
2949          $time     = ( 'modified' === $field ) ? $post->post_modified : $post->post_date;
2950          $timezone = $wp_timezone;
2951      }
2952  
2953      if ( empty( $time ) || '0000-00-00 00:00:00' === $time ) {
2954          return false;
2955      }
2956  
2957      $datetime = date_create_immutable_from_format( 'Y-m-d H:i:s', $time, $timezone );
2958  
2959      if ( false === $datetime ) {
2960          return false;
2961      }
2962  
2963      return $datetime->setTimezone( $wp_timezone );
2964  }
2965  
2966  /**
2967   * Retrieves post published or modified time as a Unix timestamp.
2968   *
2969   * Note that this function returns a true Unix timestamp, not summed with timezone offset
2970   * like older WP functions.
2971   *
2972   * @since 5.3.0
2973   *
2974   * @param int|WP_Post $post  Optional. Post ID or post object. Default is global `$post` object.
2975   * @param string      $field Optional. Published or modified time to use from database. Accepts 'date' or 'modified'.
2976   *                           Default 'date'.
2977   * @return int|false Unix timestamp on success, false on failure.
2978   */
2979  function get_post_timestamp( $post = null, $field = 'date' ) {
2980      $datetime = get_post_datetime( $post, $field );
2981  
2982      if ( false === $datetime ) {
2983          return false;
2984      }
2985  
2986      return $datetime->getTimestamp();
2987  }
2988  
2989  /**
2990   * Displays the time at which the post was last modified.
2991   *
2992   * @since 2.0.0
2993   *
2994   * @param string $format Optional. Format to use for retrieving the time the post
2995   *                       was modified. Accepts 'G', 'U', or PHP date format.
2996   *                       Defaults to the 'time_format' option.
2997   */
2998  function the_modified_time( $format = '' ) {
2999      /**
3000       * Filters the localized time a post was last modified, for display.
3001       *
3002       * @since 2.0.0
3003       *
3004       * @param string|false $get_the_modified_time The formatted time or false if no post is found.
3005       * @param string       $format                Format to use for retrieving the time the post
3006       *                                            was modified. Accepts 'G', 'U', or PHP date format.
3007       */
3008      echo apply_filters( 'the_modified_time', get_the_modified_time( $format ), $format );
3009  }
3010  
3011  /**
3012   * Retrieves the time at which the post was last modified.
3013   *
3014   * @since 2.0.0
3015   * @since 4.6.0 Added the `$post` parameter.
3016   *
3017   * @param string      $format Optional. Format to use for retrieving the time the post
3018   *                            was modified. Accepts 'G', 'U', or PHP date format.
3019   *                            Defaults to the 'time_format' option.
3020   * @param int|WP_Post $post   Optional. Post ID or WP_Post object. Default current post.
3021   * @return string|int|false Formatted date string or Unix timestamp. False on failure.
3022   */
3023  function get_the_modified_time( $format = '', $post = null ) {
3024      $post = get_post( $post );
3025  
3026      if ( ! $post ) {
3027          // For backward compatibility, failures go through the filter below.
3028          $the_time = false;
3029      } else {
3030          $_format = ! empty( $format ) ? $format : get_option( 'time_format' );
3031  
3032          $the_time = get_post_modified_time( $_format, false, $post, true );
3033      }
3034  
3035      /**
3036       * Filters the localized time a post was last modified.
3037       *
3038       * @since 2.0.0
3039       * @since 4.6.0 Added the `$post` parameter.
3040       *
3041       * @param string|int|false $the_time The formatted time or false if no post is found.
3042       * @param string           $format   Format to use for retrieving the time the post
3043       *                                   was modified. Accepts 'G', 'U', or PHP date format.
3044       * @param WP_Post|null     $post     WP_Post object or null if no post is found.
3045       */
3046      return apply_filters( 'get_the_modified_time', $the_time, $format, $post );
3047  }
3048  
3049  /**
3050   * Retrieves the time at which the post was last modified.
3051   *
3052   * @since 2.0.0
3053   *
3054   * @param string      $format    Optional. Format to use for retrieving the time the post
3055   *                               was modified. Accepts 'G', 'U', or PHP date format. Default 'U'.
3056   * @param bool        $gmt       Optional. Whether to retrieve the GMT time. Default false.
3057   * @param int|WP_Post $post      Post ID or post object. Default is global `$post` object.
3058   * @param bool        $translate Whether to translate the time string. Default false.
3059   * @return string|int|false Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
3060   *                          False on failure.
3061   */
3062  function get_post_modified_time( $format = 'U', $gmt = false, $post = null, $translate = false ) {
3063      $post = get_post( $post );
3064  
3065      if ( ! $post ) {
3066          return false;
3067      }
3068  
3069      $source   = ( $gmt ) ? 'gmt' : 'local';
3070      $datetime = get_post_datetime( $post, 'modified', $source );
3071  
3072      if ( false === $datetime ) {
3073          return false;
3074      }
3075  
3076      if ( 'U' === $format || 'G' === $format ) {
3077          $time = $datetime->getTimestamp();
3078  
3079          // Returns a sum of timestamp with timezone offset. Ideally should never be used.
3080          if ( ! $gmt ) {
3081              $time += $datetime->getOffset();
3082          }
3083      } elseif ( $translate ) {
3084          $time = wp_date( $format, $datetime->getTimestamp(), $gmt ? new DateTimeZone( 'UTC' ) : null );
3085      } else {
3086          if ( $gmt ) {
3087              $datetime = $datetime->setTimezone( new DateTimeZone( 'UTC' ) );
3088          }
3089  
3090          $time = $datetime->format( $format );
3091      }
3092  
3093      /**
3094       * Filters the localized time a post was last modified.
3095       *
3096       * @since 2.8.0
3097       *
3098       * @param string|int $time   Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
3099       * @param string     $format Format to use for retrieving the time the post was modified.
3100       *                           Accepts 'G', 'U', or PHP date format. Default 'U'.
3101       * @param bool       $gmt    Whether to retrieve the GMT time. Default false.
3102       */
3103      return apply_filters( 'get_post_modified_time', $time, $format, $gmt );
3104  }
3105  
3106  /**
3107   * Displays the localized weekday for the post.
3108   *
3109   * @since 0.71
3110   *
3111   * @global WP_Locale $wp_locale WordPress date and time locale object.
3112   */
3113  function the_weekday() {
3114      global $wp_locale;
3115  
3116      $post = get_post();
3117  
3118      if ( ! $post ) {
3119          return;
3120      }
3121  
3122      $the_weekday = $wp_locale->get_weekday( get_post_time( 'w', false, $post ) );
3123  
3124      /**
3125       * Filters the localized weekday of the post, for display.
3126       *
3127       * @since 0.71
3128       *
3129       * @param string $the_weekday
3130       */
3131      echo apply_filters( 'the_weekday', $the_weekday );
3132  }
3133  
3134  /**
3135   * Displays the localized weekday for the post.
3136   *
3137   * Will only output the weekday if the current post's weekday is different from
3138   * the previous one output.
3139   *
3140   * @since 0.71
3141   *
3142   * @global WP_Locale $wp_locale       WordPress date and time locale object.
3143   * @global string    $currentday      The day of the current post in the loop.
3144   * @global string    $previousweekday The day of the previous post in the loop.
3145   *
3146   * @param string $before Optional. Output before the date. Default empty.
3147   * @param string $after  Optional. Output after the date. Default empty.
3148   */
3149  function the_weekday_date( $before = '', $after = '' ) {
3150      global $wp_locale, $currentday, $previousweekday;
3151  
3152      $post = get_post();
3153  
3154      if ( ! $post ) {
3155          return;
3156      }
3157  
3158      $the_weekday_date = '';
3159  
3160      if ( $currentday !== $previousweekday ) {
3161          $the_weekday_date .= $before;
3162          $the_weekday_date .= $wp_locale->get_weekday( get_post_time( 'w', false, $post ) );
3163          $the_weekday_date .= $after;
3164          $previousweekday   = $currentday;
3165      }
3166  
3167      /**
3168       * Filters the localized weekday of the post, for display.
3169       *
3170       * @since 0.71
3171       *
3172       * @param string $the_weekday_date The weekday on which the post was written.
3173       * @param string $before           The HTML to output before the date.
3174       * @param string $after            The HTML to output after the date.
3175       */
3176      echo apply_filters( 'the_weekday_date', $the_weekday_date, $before, $after );
3177  }
3178  
3179  /**
3180   * Fires the wp_head action.
3181   *
3182   * See {@see 'wp_head'}.
3183   *
3184   * @since 1.2.0
3185   */
3186  function wp_head() {
3187      /**
3188       * Prints scripts or data in the head tag on the front end.
3189       *
3190       * @since 1.5.0
3191       */
3192      do_action( 'wp_head' );
3193  }
3194  
3195  /**
3196   * Fires the wp_footer action.
3197   *
3198   * See {@see 'wp_footer'}.
3199   *
3200   * @since 1.5.1
3201   */
3202  function wp_footer() {
3203      /**
3204       * Prints scripts or data before the closing body tag on the front end.
3205       *
3206       * @since 1.5.1
3207       */
3208      do_action( 'wp_footer' );
3209  }
3210  
3211  /**
3212   * Fires the wp_body_open action.
3213   *
3214   * See {@see 'wp_body_open'}.
3215   *
3216   * @since 5.2.0
3217   */
3218  function wp_body_open() {
3219      /**
3220       * Triggered after the opening body tag.
3221       *
3222       * @since 5.2.0
3223       */
3224      do_action( 'wp_body_open' );
3225  }
3226  
3227  /**
3228   * Displays the links to the general feeds.
3229   *
3230   * @since 2.8.0
3231   *
3232   * @param array $args Optional arguments.
3233   */
3234  function feed_links( $args = array() ) {
3235      if ( ! current_theme_supports( 'automatic-feed-links' ) ) {
3236          return;
3237      }
3238  
3239      $defaults = array(
3240          /* translators: Separator between site name and feed type in feed links. */
3241          'separator' => _x( '&raquo;', 'feed link' ),
3242          /* translators: 1: Site title, 2: Separator (raquo). */
3243          'feedtitle' => __( '%1$s %2$s Feed' ),
3244          /* translators: 1: Site title, 2: Separator (raquo). */
3245          'comstitle' => __( '%1$s %2$s Comments Feed' ),
3246      );
3247  
3248      $args = wp_parse_args( $args, $defaults );
3249  
3250      /**
3251       * Filters the feed links arguments.
3252       *
3253       * @since 6.7.0
3254       *
3255       * @param array $args An array of feed links arguments.
3256       */
3257      $args = apply_filters( 'feed_links_args', $args );
3258  
3259      /**
3260       * Filters whether to display the posts feed link.
3261       *
3262       * @since 4.4.0
3263       *
3264       * @param bool $show Whether to display the posts feed link. Default true.
3265       */
3266      if ( apply_filters( 'feed_links_show_posts_feed', true ) ) {
3267          printf(
3268              '<link rel="alternate" type="%s" title="%s" href="%s" />' . "\n",
3269              feed_content_type(),
3270              esc_attr( sprintf( $args['feedtitle'], get_bloginfo( 'name' ), $args['separator'] ) ),
3271              esc_url( get_feed_link() )
3272          );
3273      }
3274  
3275      /**
3276       * Filters whether to display the comments feed link.
3277       *
3278       * @since 4.4.0
3279       *
3280       * @param bool $show Whether to display the comments feed link. Default true.
3281       */
3282      if ( apply_filters( 'feed_links_show_comments_feed', true ) ) {
3283          printf(
3284              '<link rel="alternate" type="%s" title="%s" href="%s" />' . "\n",
3285              feed_content_type(),
3286              esc_attr( sprintf( $args['comstitle'], get_bloginfo( 'name' ), $args['separator'] ) ),
3287              esc_url( get_feed_link( 'comments_' . get_default_feed() ) )
3288          );
3289      }
3290  }
3291  
3292  /**
3293   * Displays the links to the extra feeds such as category feeds.
3294   *
3295   * @since 2.8.0
3296   *
3297   * @param array $args Optional arguments.
3298   */
3299  function feed_links_extra( $args = array() ) {
3300      $defaults = array(
3301          /* translators: Separator between site name and feed type in feed links. */
3302          'separator'     => _x( '&raquo;', 'feed link' ),
3303          /* translators: 1: Site name, 2: Separator (raquo), 3: Post title. */
3304          'singletitle'   => __( '%1$s %2$s %3$s Comments Feed' ),
3305          /* translators: 1: Site name, 2: Separator (raquo), 3: Category name. */
3306          'cattitle'      => __( '%1$s %2$s %3$s Category Feed' ),
3307          /* translators: 1: Site name, 2: Separator (raquo), 3: Tag name. */
3308          'tagtitle'      => __( '%1$s %2$s %3$s Tag Feed' ),
3309          /* translators: 1: Site name, 2: Separator (raquo), 3: Term name, 4: Taxonomy singular name. */
3310          'taxtitle'      => __( '%1$s %2$s %3$s %4$s Feed' ),
3311          /* translators: 1: Site name, 2: Separator (raquo), 3: Author name. */
3312          'authortitle'   => __( '%1$s %2$s Posts by %3$s Feed' ),
3313          /* translators: 1: Site name, 2: Separator (raquo), 3: Search query. */
3314          'searchtitle'   => __( '%1$s %2$s Search Results for &#8220;%3$s&#8221; Feed' ),
3315          /* translators: 1: Site name, 2: Separator (raquo), 3: Post type name. */
3316          'posttypetitle' => __( '%1$s %2$s %3$s Feed' ),
3317      );
3318  
3319      $args = wp_parse_args( $args, $defaults );
3320  
3321      /**
3322       * Filters the extra feed links arguments.
3323       *
3324       * @since 6.7.0
3325       *
3326       * @param array $args An array of extra feed links arguments.
3327       */
3328      $args = apply_filters( 'feed_links_extra_args', $args );
3329  
3330      if ( is_singular() ) {
3331          $id   = 0;
3332          $post = get_post( $id );
3333  
3334          /** This filter is documented in wp-includes/general-template.php */
3335          $show_comments_feed = apply_filters( 'feed_links_show_comments_feed', true );
3336  
3337          /**
3338           * Filters whether to display the post comments feed link.
3339           *
3340           * This filter allows to enable or disable the feed link for a singular post
3341           * in a way that is independent of {@see 'feed_links_show_comments_feed'}
3342           * (which controls the global comments feed). The result of that filter
3343           * is accepted as a parameter.
3344           *
3345           * @since 6.1.0
3346           *
3347           * @param bool $show_comments_feed Whether to display the post comments feed link. Defaults to
3348           *                                 the {@see 'feed_links_show_comments_feed'} filter result.
3349           */
3350          $show_post_comments_feed = apply_filters( 'feed_links_extra_show_post_comments_feed', $show_comments_feed );
3351  
3352          if ( $show_post_comments_feed && ( comments_open() || pings_open() || $post->comment_count > 0 ) ) {
3353              $title = sprintf(
3354                  $args['singletitle'],
3355                  get_bloginfo( 'name' ),
3356                  $args['separator'],
3357                  the_title_attribute( array( 'echo' => false ) )
3358              );
3359  
3360              $feed_link = get_post_comments_feed_link( $post->ID );
3361  
3362              if ( $feed_link ) {
3363                  $href = $feed_link;
3364              }
3365          }
3366      } elseif ( is_post_type_archive() ) {
3367          /**
3368           * Filters whether to display the post type archive feed link.
3369           *
3370           * @since 6.1.0
3371           *
3372           * @param bool $show Whether to display the post type archive feed link. Default true.
3373           */
3374          $show_post_type_archive_feed = apply_filters( 'feed_links_extra_show_post_type_archive_feed', true );
3375  
3376          if ( $show_post_type_archive_feed ) {
3377              $post_type = get_query_var( 'post_type' );
3378  
3379              if ( is_array( $post_type ) ) {
3380                  $post_type = reset( $post_type );
3381              }
3382  
3383              $post_type_obj = get_post_type_object( $post_type );
3384  
3385              $title = sprintf(
3386                  $args['posttypetitle'],
3387                  get_bloginfo( 'name' ),
3388                  $args['separator'],
3389                  $post_type_obj->labels->name
3390              );
3391  
3392              $href = get_post_type_archive_feed_link( $post_type_obj->name );
3393          }
3394      } elseif ( is_category() ) {
3395          /**
3396           * Filters whether to display the category feed link.
3397           *
3398           * @since 6.1.0
3399           *
3400           * @param bool $show Whether to display the category feed link. Default true.
3401           */
3402          $show_category_feed = apply_filters( 'feed_links_extra_show_category_feed', true );
3403  
3404          if ( $show_category_feed ) {
3405              $term = get_queried_object();
3406  
3407              if ( $term ) {
3408                  $title = sprintf(
3409                      $args['cattitle'],
3410                      get_bloginfo( 'name' ),
3411                      $args['separator'],
3412                      $term->name
3413                  );
3414  
3415                  $href = get_category_feed_link( $term->term_id );
3416              }
3417          }
3418      } elseif ( is_tag() ) {
3419          /**
3420           * Filters whether to display the tag feed link.
3421           *
3422           * @since 6.1.0
3423           *
3424           * @param bool $show Whether to display the tag feed link. Default true.
3425           */
3426          $show_tag_feed = apply_filters( 'feed_links_extra_show_tag_feed', true );
3427  
3428          if ( $show_tag_feed ) {
3429              $term = get_queried_object();
3430  
3431              if ( $term ) {
3432                  $title = sprintf(
3433                      $args['tagtitle'],
3434                      get_bloginfo( 'name' ),
3435                      $args['separator'],
3436                      $term->name
3437                  );
3438  
3439                  $href = get_tag_feed_link( $term->term_id );
3440              }
3441          }
3442      } elseif ( is_tax() ) {
3443          /**
3444           * Filters whether to display the custom taxonomy feed link.
3445           *
3446           * @since 6.1.0
3447           *
3448           * @param bool $show Whether to display the custom taxonomy feed link. Default true.
3449           */
3450          $show_tax_feed = apply_filters( 'feed_links_extra_show_tax_feed', true );
3451  
3452          if ( $show_tax_feed ) {
3453              $term = get_queried_object();
3454  
3455              if ( $term ) {
3456                  $tax = get_taxonomy( $term->taxonomy );
3457  
3458                  $title = sprintf(
3459                      $args['taxtitle'],
3460                      get_bloginfo( 'name' ),
3461                      $args['separator'],
3462                      $term->name,
3463                      $tax->labels->singular_name
3464                  );
3465  
3466                  $href = get_term_feed_link( $term->term_id, $term->taxonomy );
3467              }
3468          }
3469      } elseif ( is_author() ) {
3470          /**
3471           * Filters whether to display the author feed link.
3472           *
3473           * @since 6.1.0
3474           *
3475           * @param bool $show Whether to display the author feed link. Default true.
3476           */
3477          $show_author_feed = apply_filters( 'feed_links_extra_show_author_feed', true );
3478  
3479          if ( $show_author_feed ) {
3480              $author_id = (int) get_query_var( 'author' );
3481  
3482              $title = sprintf(
3483                  $args['authortitle'],
3484                  get_bloginfo( 'name' ),
3485                  $args['separator'],
3486                  get_the_author_meta( 'display_name', $author_id )
3487              );
3488  
3489              $href = get_author_feed_link( $author_id );
3490          }
3491      } elseif ( is_search() ) {
3492          /**
3493           * Filters whether to display the search results feed link.
3494           *
3495           * @since 6.1.0
3496           *
3497           * @param bool $show Whether to display the search results feed link. Default true.
3498           */
3499          $show_search_feed = apply_filters( 'feed_links_extra_show_search_feed', true );
3500  
3501          if ( $show_search_feed ) {
3502              $title = sprintf(
3503                  $args['searchtitle'],
3504                  get_bloginfo( 'name' ),
3505                  $args['separator'],
3506                  get_search_query( false )
3507              );
3508  
3509              $href = get_search_feed_link();
3510          }
3511      }
3512  
3513      if ( isset( $title ) && isset( $href ) ) {
3514          printf(
3515              '<link rel="alternate" type="%s" title="%s" href="%s" />' . "\n",
3516              feed_content_type(),
3517              esc_attr( $title ),
3518              esc_url( $href )
3519          );
3520      }
3521  }
3522  
3523  /**
3524   * Displays the link to the Really Simple Discovery service endpoint.
3525   *
3526   * @link http://archipelago.phrasewise.com/rsd
3527   * @since 2.0.0
3528   */
3529  function rsd_link() {
3530      printf(
3531          '<link rel="EditURI" type="application/rsd+xml" title="RSD" href="%s" />' . "\n",
3532          esc_url( site_url( 'xmlrpc.php?rsd', 'rpc' ) )
3533      );
3534  }
3535  
3536  /**
3537   * Displays a referrer `strict-origin-when-cross-origin` meta tag.
3538   *
3539   * Outputs a referrer `strict-origin-when-cross-origin` meta tag that tells the browser not to send
3540   * the full URL as a referrer to other sites when cross-origin assets are loaded.
3541   *
3542   * Typical usage is as a {@see 'wp_head'} callback:
3543   *
3544   *     add_action( 'wp_head', 'wp_strict_cross_origin_referrer' );
3545   *
3546   * @since 5.7.0
3547   */
3548  function wp_strict_cross_origin_referrer() {
3549      ?>
3550      <meta name='referrer' content='strict-origin-when-cross-origin' />
3551      <?php
3552  }
3553  
3554  /**
3555   * Displays site icon meta tags.
3556   *
3557   * @since 4.3.0
3558   *
3559   * @link https://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#rel-icon HTML5 specification link icon.
3560   */
3561  function wp_site_icon() {
3562      if ( ! has_site_icon() && ! is_customize_preview() ) {
3563          return;
3564      }
3565  
3566      $meta_tags = array();
3567      $icon_32   = get_site_icon_url( 32 );
3568      if ( empty( $icon_32 ) && is_customize_preview() ) {
3569          $icon_32 = '/favicon.ico'; // Serve default favicon URL in customizer so element can be updated for preview.
3570      }
3571      if ( $icon_32 ) {
3572          $meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( $icon_32 ) );
3573      }
3574      $icon_192 = get_site_icon_url( 192 );
3575      if ( $icon_192 ) {
3576          $meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( $icon_192 ) );
3577      }
3578      $icon_180 = get_site_icon_url( 180 );
3579      if ( $icon_180 ) {
3580          $meta_tags[] = sprintf( '<link rel="apple-touch-icon" href="%s" />', esc_url( $icon_180 ) );
3581      }
3582      $icon_270 = get_site_icon_url( 270 );
3583      if ( $icon_270 ) {
3584          $meta_tags[] = sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( $icon_270 ) );
3585      }
3586  
3587      /**
3588       * Filters the site icon meta tags, so plugins can add their own.
3589       *
3590       * @since 4.3.0
3591       *
3592       * @param string[] $meta_tags Array of Site Icon meta tags.
3593       */
3594      $meta_tags = apply_filters( 'site_icon_meta_tags', $meta_tags );
3595      $meta_tags = array_filter( $meta_tags );
3596  
3597      foreach ( $meta_tags as $meta_tag ) {
3598          echo "$meta_tag\n";
3599      }
3600  }
3601  
3602  /**
3603   * Prints resource hints to browsers for pre-fetching, pre-rendering
3604   * and pre-connecting to websites.
3605   *
3606   * Gives hints to browsers to prefetch specific pages or render them
3607   * in the background, to perform DNS lookups or to begin the connection
3608   * handshake (DNS, TCP, TLS) in the background.
3609   *
3610   * These performance improving indicators work by using `<link rel"…">`.
3611   *
3612   * @since 4.6.0
3613   */
3614  function wp_resource_hints() {
3615      $hints = array(
3616          'dns-prefetch' => wp_dependencies_unique_hosts(),
3617          'preconnect'   => array(),
3618          'prefetch'     => array(),
3619          'prerender'    => array(),
3620      );
3621  
3622      foreach ( $hints as $relation_type => $urls ) {
3623          $unique_urls = array();
3624  
3625          /**
3626           * Filters domains and URLs for resource hints of the given relation type.
3627           *
3628           * @since 4.6.0
3629           * @since 4.7.0 The `$urls` parameter accepts arrays of specific HTML attributes
3630           *              as its child elements.
3631           *
3632           * @param array  $urls {
3633           *     Array of resources and their attributes, or URLs to print for resource hints.
3634           *
3635           *     @type array|string ...$0 {
3636           *         Array of resource attributes, or a URL string.
3637           *
3638           *         @type string $href        URL to include in resource hints. Required.
3639           *         @type string $as          How the browser should treat the resource
3640           *                                   (`script`, `style`, `image`, `document`, etc).
3641           *         @type string $crossorigin Indicates the CORS policy of the specified resource.
3642           *         @type float  $pr          Expected probability that the resource hint will be used.
3643           *         @type string $type        Type of the resource (`text/html`, `text/css`, etc).
3644           *     }
3645           * }
3646           * @param string $relation_type The relation type the URLs are printed for. One of
3647           *                              'dns-prefetch', 'preconnect', 'prefetch', or 'prerender'.
3648           */
3649          $urls = apply_filters( 'wp_resource_hints', $urls, $relation_type );
3650  
3651          foreach ( $urls as $key => $url ) {
3652              $atts = array();
3653  
3654              if ( is_array( $url ) ) {
3655                  if ( isset( $url['href'] ) ) {
3656                      $atts = $url;
3657                      $url  = $url['href'];
3658                  } else {
3659                      continue;
3660                  }
3661              }
3662  
3663              $url = esc_url( $url, array( 'http', 'https' ) );
3664  
3665              if ( ! $url ) {
3666                  continue;
3667              }
3668  
3669              if ( isset( $unique_urls[ $url ] ) ) {
3670                  continue;
3671              }
3672  
3673              if ( in_array( $relation_type, array( 'preconnect', 'dns-prefetch' ), true ) ) {
3674                  $parsed = wp_parse_url( $url );
3675  
3676                  if ( empty( $parsed['host'] ) ) {
3677                      continue;
3678                  }
3679  
3680                  if ( 'preconnect' === $relation_type && ! empty( $parsed['scheme'] ) ) {
3681                      $url = $parsed['scheme'] . '://' . $parsed['host'];
3682                  } else {
3683                      // Use protocol-relative URLs for dns-prefetch or if scheme is missing.
3684                      $url = '//' . $parsed['host'];
3685                  }
3686              }
3687  
3688              $atts['rel']  = $relation_type;
3689              $atts['href'] = $url;
3690  
3691              $unique_urls[ $url ] = $atts;
3692          }
3693  
3694          foreach ( $unique_urls as $atts ) {
3695              $html = '';
3696  
3697              foreach ( $atts as $attr => $value ) {
3698                  if ( ! is_scalar( $value )
3699                      || ( ! in_array( $attr, array( 'as', 'crossorigin', 'href', 'pr', 'rel', 'type' ), true ) && ! is_numeric( $attr ) )
3700                  ) {
3701  
3702                      continue;
3703                  }
3704  
3705                  $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
3706  
3707                  if ( ! is_string( $attr ) ) {
3708                      $html .= " $value";
3709                  } else {
3710                      $html .= " $attr='$value'";
3711                  }
3712              }
3713  
3714              $html = trim( $html );
3715  
3716              echo "<link $html />\n";
3717          }
3718      }
3719  }
3720  
3721  /**
3722   * Prints resource preloads directives to browsers.
3723   *
3724   * Gives directive to browsers to preload specific resources that website will
3725   * need very soon, this ensures that they are available earlier and are less
3726   * likely to block the page's render. Preload directives should not be used for
3727   * non-render-blocking elements, as then they would compete with the
3728   * render-blocking ones, slowing down the render.
3729   *
3730   * These performance improving indicators work by using `<link rel="preload">`.
3731   *
3732   * @link https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preload
3733   * @link https://web.dev/preload-responsive-images/
3734   *
3735   * @since 6.1.0
3736   */
3737  function wp_preload_resources() {
3738      /**
3739       * Filters domains and URLs for resource preloads.
3740       *
3741       * @since 6.1.0
3742       * @since 6.6.0 Added the `$fetchpriority` attribute.
3743       *
3744       * @param array  $preload_resources {
3745       *     Array of resources and their attributes, or URLs to print for resource preloads.
3746       *
3747       *     @type array ...$0 {
3748       *         Array of resource attributes.
3749       *
3750       *         @type string $href          URL to include in resource preloads. Required.
3751       *         @type string $as            How the browser should treat the resource
3752       *                                     (`script`, `style`, `image`, `document`, etc).
3753       *         @type string $crossorigin   Indicates the CORS policy of the specified resource.
3754       *         @type string $type          Type of the resource (`text/html`, `text/css`, etc).
3755       *         @type string $media         Accepts media types or media queries. Allows responsive preloading.
3756       *         @type string $imagesizes    Responsive source size to the source Set.
3757       *         @type string $imagesrcset   Responsive image sources to the source set.
3758       *         @type string $fetchpriority Fetchpriority value for the resource.
3759       *     }
3760       * }
3761       */
3762      $preload_resources = apply_filters( 'wp_preload_resources', array() );
3763  
3764      if ( ! is_array( $preload_resources ) ) {
3765          return;
3766      }
3767  
3768      $unique_resources = array();
3769  
3770      // Parse the complete resource list and extract unique resources.
3771      foreach ( $preload_resources as $resource ) {
3772          if ( ! is_array( $resource ) ) {
3773              continue;
3774          }
3775  
3776          $attributes = $resource;
3777          if ( isset( $resource['href'] ) ) {
3778              $href = $resource['href'];
3779              if ( isset( $unique_resources[ $href ] ) ) {
3780                  continue;
3781              }
3782              $unique_resources[ $href ] = $attributes;
3783              // Media can use imagesrcset and not href.
3784          } elseif ( ( 'image' === $resource['as'] ) &&
3785              ( isset( $resource['imagesrcset'] ) || isset( $resource['imagesizes'] ) )
3786          ) {
3787              if ( isset( $unique_resources[ $resource['imagesrcset'] ] ) ) {
3788                  continue;
3789              }
3790              $unique_resources[ $resource['imagesrcset'] ] = $attributes;
3791          } else {
3792              continue;
3793          }
3794      }
3795  
3796      // Build and output the HTML for each unique resource.
3797      foreach ( $unique_resources as $unique_resource ) {
3798          $html = '';
3799  
3800          foreach ( $unique_resource as $resource_key => $resource_value ) {
3801              if ( ! is_scalar( $resource_value ) ) {
3802                  continue;
3803              }
3804  
3805              // Ignore non-supported attributes.
3806              $non_supported_attributes = array( 'as', 'crossorigin', 'href', 'imagesrcset', 'imagesizes', 'type', 'media', 'fetchpriority' );
3807              if ( ! in_array( $resource_key, $non_supported_attributes, true ) && ! is_numeric( $resource_key ) ) {
3808                  continue;
3809              }
3810  
3811              // imagesrcset only usable when preloading image, ignore otherwise.
3812              if ( ( 'imagesrcset' === $resource_key ) && ( ! isset( $unique_resource['as'] ) || ( 'image' !== $unique_resource['as'] ) ) ) {
3813                  continue;
3814              }
3815  
3816              // imagesizes only usable when preloading image and imagesrcset present, ignore otherwise.
3817              if ( ( 'imagesizes' === $resource_key ) &&
3818                  ( ! isset( $unique_resource['as'] ) || ( 'image' !== $unique_resource['as'] ) || ! isset( $unique_resource['imagesrcset'] ) )
3819              ) {
3820                  continue;
3821              }
3822  
3823              $resource_value = ( 'href' === $resource_key ) ? esc_url( $resource_value, array( 'http', 'https' ) ) : esc_attr( $resource_value );
3824  
3825              if ( ! is_string( $resource_key ) ) {
3826                  $html .= " $resource_value";
3827              } else {
3828                  $html .= " $resource_key='$resource_value'";
3829              }
3830          }
3831          $html = trim( $html );
3832  
3833          printf( "<link rel='preload' %s />\n", $html );
3834      }
3835  }
3836  
3837  /**
3838   * Retrieves a list of unique hosts of all enqueued scripts and styles.
3839   *
3840   * @since 4.6.0
3841   *
3842   * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
3843   * @global WP_Styles  $wp_styles  The WP_Styles object for printing styles.
3844   *
3845   * @return string[] A list of unique hosts of enqueued scripts and styles.
3846   */
3847  function wp_dependencies_unique_hosts() {
3848      global $wp_scripts, $wp_styles;
3849  
3850      $unique_hosts = array();
3851  
3852      foreach ( array( $wp_scripts, $wp_styles ) as $dependencies ) {
3853          if ( $dependencies instanceof WP_Dependencies && ! empty( $dependencies->queue ) ) {
3854              foreach ( $dependencies->queue as $handle ) {
3855                  if ( ! isset( $dependencies->registered[ $handle ] ) ) {
3856                      continue;
3857                  }
3858  
3859                  /* @var _WP_Dependency $dependency */
3860                  $dependency = $dependencies->registered[ $handle ];
3861                  $parsed     = wp_parse_url( $dependency->src );
3862  
3863                  if ( ! empty( $parsed['host'] )
3864                      && ! in_array( $parsed['host'], $unique_hosts, true ) && $parsed['host'] !== $_SERVER['SERVER_NAME']
3865                  ) {
3866                      $unique_hosts[] = $parsed['host'];
3867                  }
3868              }
3869          }
3870      }
3871  
3872      return $unique_hosts;
3873  }
3874  
3875  /**
3876   * Determines whether the user can access the visual editor.
3877   *
3878   * Checks if the user can access the visual editor and that it's supported by the user's browser.
3879   *
3880   * @since 2.0.0
3881   *
3882   * @global bool $wp_rich_edit Whether the user can access the visual editor.
3883   * @global bool $is_gecko     Whether the browser is Gecko-based.
3884   * @global bool $is_opera     Whether the browser is Opera.
3885   * @global bool $is_safari    Whether the browser is Safari.
3886   * @global bool $is_chrome    Whether the browser is Chrome.
3887   * @global bool $is_IE        Whether the browser is Internet Explorer.
3888   * @global bool $is_edge      Whether the browser is Microsoft Edge.
3889   *
3890   * @return bool True if the user can access the visual editor, false otherwise.
3891   */
3892  function user_can_richedit() {
3893      global $wp_rich_edit, $is_gecko, $is_opera, $is_safari, $is_chrome, $is_IE, $is_edge;
3894  
3895      if ( ! isset( $wp_rich_edit ) ) {
3896          $wp_rich_edit = false;
3897  
3898          if ( 'true' === get_user_option( 'rich_editing' ) || ! is_user_logged_in() ) { // Default to 'true' for logged out users.
3899              if ( $is_safari ) {
3900                  $wp_rich_edit = ! wp_is_mobile() || ( preg_match( '!AppleWebKit/(\d+)!', $_SERVER['HTTP_USER_AGENT'], $match ) && (int) $match[1] >= 534 );
3901              } elseif ( $is_IE ) {
3902                  $wp_rich_edit = str_contains( $_SERVER['HTTP_USER_AGENT'], 'Trident/7.0;' );
3903              } elseif ( $is_gecko || $is_chrome || $is_edge || ( $is_opera && ! wp_is_mobile() ) ) {
3904                  $wp_rich_edit = true;
3905              }
3906          }
3907      }
3908  
3909      /**
3910       * Filters whether the user can access the visual editor.
3911       *
3912       * @since 2.1.0
3913       *
3914       * @param bool $wp_rich_edit Whether the user can access the visual editor.
3915       */
3916      return apply_filters( 'user_can_richedit', $wp_rich_edit );
3917  }
3918  
3919  /**
3920   * Finds out which editor should be displayed by default.
3921   *
3922   * Works out which of the editors to display as the current editor for a
3923   * user. The 'html' setting is for the "Code" editor tab.
3924   *
3925   * @since 2.5.0
3926   *
3927   * @return string Either 'tinymce', 'html', or 'test'
3928   */
3929  function wp_default_editor() {
3930      $r = user_can_richedit() ? 'tinymce' : 'html'; // Defaults.
3931      if ( wp_get_current_user() ) { // Look for cookie.
3932          $ed = get_user_setting( 'editor', 'tinymce' );
3933          $r  = ( in_array( $ed, array( 'tinymce', 'html', 'test' ), true ) ) ? $ed : $r;
3934      }
3935  
3936      /**
3937       * Filters which editor should be displayed by default.
3938       *
3939       * @since 2.5.0
3940       *
3941       * @param string $r Which editor should be displayed by default. Either 'tinymce', 'html', or 'test'.
3942       */
3943      return apply_filters( 'wp_default_editor', $r );
3944  }
3945  
3946  /**
3947   * Renders an editor.
3948   *
3949   * Using this function is the proper way to output all needed components for both TinyMCE and Quicktags.
3950   * _WP_Editors should not be used directly. See https://core.trac.wordpress.org/ticket/17144.
3951   *
3952   * NOTE: Once initialized the TinyMCE editor cannot be safely moved in the DOM. For that reason
3953   * running wp_editor() inside of a meta box is not a good idea unless only Quicktags is used.
3954   * On the post edit screen several actions can be used to include additional editors
3955   * containing TinyMCE: 'edit_page_form', 'edit_form_advanced' and 'dbx_post_sidebar'.
3956   * See https://core.trac.wordpress.org/ticket/19173 for more information.
3957   *
3958   * @see _WP_Editors::editor()
3959   * @see _WP_Editors::parse_settings()
3960   * @since 3.3.0
3961   *
3962   * @param string $content   Initial content for the editor.
3963   * @param string $editor_id HTML ID attribute value for the textarea and TinyMCE.
3964   *                          Should not contain square brackets.
3965   * @param array  $settings  See _WP_Editors::parse_settings() for description.
3966   */
3967  function wp_editor( $content, $editor_id, $settings = array() ) {
3968      if ( ! class_exists( '_WP_Editors', false ) ) {
3969          require  ABSPATH . WPINC . '/class-wp-editor.php';
3970      }
3971      _WP_Editors::editor( $content, $editor_id, $settings );
3972  }
3973  
3974  /**
3975   * Outputs the editor scripts, stylesheets, and default settings.
3976   *
3977   * The editor can be initialized when needed after page load.
3978   * See wp.editor.initialize() in wp-admin/js/editor.js for initialization options.
3979   *
3980   * @uses _WP_Editors
3981   * @since 4.8.0
3982   */
3983  function wp_enqueue_editor() {
3984      if ( ! class_exists( '_WP_Editors', false ) ) {
3985          require  ABSPATH . WPINC . '/class-wp-editor.php';
3986      }
3987  
3988      _WP_Editors::enqueue_default_editor();
3989  }
3990  
3991  /**
3992   * Enqueues assets needed by the code editor for the given settings.
3993   *
3994   * @since 4.9.0
3995   *
3996   * @see wp_enqueue_editor()
3997   * @see wp_get_code_editor_settings();
3998   * @see _WP_Editors::parse_settings()
3999   *
4000   * @param array $args {
4001   *     Args.
4002   *
4003   *     @type string   $type       The MIME type of the file to be edited.
4004   *     @type string   $file       Filename to be edited. Extension is used to sniff the type. Can be supplied as alternative to `$type` param.
4005   *     @type WP_Theme $theme      Theme being edited when on the theme file editor.
4006   *     @type string   $plugin     Plugin being edited when on the plugin file editor.
4007   *     @type array    $codemirror Additional CodeMirror setting overrides.
4008   *     @type array    $csslint    CSSLint rule overrides.
4009   *     @type array    $jshint     JSHint rule overrides.
4010   *     @type array    $htmlhint   HTMLHint rule overrides.
4011   * }
4012   * @return array|false Settings for the enqueued code editor, or false if the editor was not enqueued.
4013   */
4014  function wp_enqueue_code_editor( $args ) {
4015      if ( is_user_logged_in() && 'false' === wp_get_current_user()->syntax_highlighting ) {
4016          return false;
4017      }
4018  
4019      $settings = wp_get_code_editor_settings( $args );
4020  
4021      if ( empty( $settings ) || empty( $settings['codemirror'] ) ) {
4022          return false;
4023      }
4024  
4025      wp_enqueue_script( 'code-editor' );
4026      wp_enqueue_style( 'code-editor' );
4027  
4028      if ( isset( $settings['codemirror']['mode'] ) ) {
4029          $mode = $settings['codemirror']['mode'];
4030          if ( is_string( $mode ) ) {
4031              $mode = array(
4032                  'name' => $mode,
4033              );
4034          }
4035  
4036          if ( ! empty( $settings['codemirror']['lint'] ) ) {
4037              switch ( $mode['name'] ) {
4038                  case 'css':
4039                  case 'text/css':
4040                  case 'text/x-scss':
4041                  case 'text/x-less':
4042                      wp_enqueue_script( 'csslint' );
4043                      break;
4044                  case 'htmlmixed':
4045                  case 'text/html':
4046                  case 'php':
4047                  case 'application/x-httpd-php':
4048                  case 'text/x-php':
4049                      wp_enqueue_script( 'htmlhint' );
4050                      wp_enqueue_script( 'csslint' );
4051                      wp_enqueue_script( 'jshint' );
4052                      if ( ! current_user_can( 'unfiltered_html' ) ) {
4053                          wp_enqueue_script( 'htmlhint-kses' );
4054                      }
4055                      break;
4056                  case 'javascript':
4057                  case 'application/ecmascript':
4058                  case 'application/json':
4059                  case 'application/javascript':
4060                  case 'application/ld+json':
4061                  case 'text/typescript':
4062                  case 'application/typescript':
4063                      wp_enqueue_script( 'jshint' );
4064                      wp_enqueue_script( 'jsonlint' );
4065                      break;
4066              }
4067          }
4068      }
4069  
4070      wp_add_inline_script( 'code-editor', sprintf( 'jQuery.extend( wp.codeEditor.defaultSettings, %s );', wp_json_encode( $settings ) ) );
4071  
4072      /**
4073       * Fires when scripts and styles are enqueued for the code editor.
4074       *
4075       * @since 4.9.0
4076       *
4077       * @param array $settings Settings for the enqueued code editor.
4078       */
4079      do_action( 'wp_enqueue_code_editor', $settings );
4080  
4081      return $settings;
4082  }
4083  
4084  /**
4085   * Generates and returns code editor settings.
4086   *
4087   * @since 5.0.0
4088   *
4089   * @see wp_enqueue_code_editor()
4090   *
4091   * @param array $args {
4092   *     Args.
4093   *
4094   *     @type string   $type       The MIME type of the file to be edited.
4095   *     @type string   $file       Filename to be edited. Extension is used to sniff the type. Can be supplied as alternative to `$type` param.
4096   *     @type WP_Theme $theme      Theme being edited when on the theme file editor.
4097   *     @type string   $plugin     Plugin being edited when on the plugin file editor.
4098   *     @type array    $codemirror Additional CodeMirror setting overrides.
4099   *     @type array    $csslint    CSSLint rule overrides.
4100   *     @type array    $jshint     JSHint rule overrides.
4101   *     @type array    $htmlhint   HTMLHint rule overrides.
4102   * }
4103   * @return array|false Settings for the code editor.
4104   */
4105  function wp_get_code_editor_settings( $args ) {
4106      $settings = array(
4107          'codemirror' => array(
4108              'indentUnit'       => 4,
4109              'indentWithTabs'   => true,
4110              'inputStyle'       => 'contenteditable',
4111              'lineNumbers'      => true,
4112              'lineWrapping'     => true,
4113              'styleActiveLine'  => true,
4114              'continueComments' => true,
4115              'extraKeys'        => array(
4116                  'Ctrl-Space' => 'autocomplete',
4117                  'Ctrl-/'     => 'toggleComment',
4118                  'Cmd-/'      => 'toggleComment',
4119                  'Alt-F'      => 'findPersistent',
4120                  'Ctrl-F'     => 'findPersistent',
4121                  'Cmd-F'      => 'findPersistent',
4122              ),
4123              'direction'        => 'ltr', // Code is shown in LTR even in RTL languages.
4124              'gutters'          => array(),
4125          ),
4126          'csslint'    => array(
4127              'errors'                    => true, // Parsing errors.
4128              'box-model'                 => true,
4129              'display-property-grouping' => true,
4130              'duplicate-properties'      => true,
4131              'known-properties'          => true,
4132              'outline-none'              => true,
4133          ),
4134          'jshint'     => array(
4135              // The following are copied from <https://github.com/WordPress/wordpress-develop/blob/4.8.1/.jshintrc>.
4136              'boss'     => true,
4137              'curly'    => true,
4138              'eqeqeq'   => true,
4139              'eqnull'   => true,
4140              'es3'      => true,
4141              'expr'     => true,
4142              'immed'    => true,
4143              'noarg'    => true,
4144              'nonbsp'   => true,
4145              'onevar'   => true,
4146              'quotmark' => 'single',
4147              'trailing' => true,
4148              'undef'    => true,
4149              'unused'   => true,
4150  
4151              'browser'  => true,
4152  
4153              'globals'  => array(
4154                  '_'        => false,
4155                  'Backbone' => false,
4156                  'jQuery'   => false,
4157                  'JSON'     => false,
4158                  'wp'       => false,
4159              ),
4160          ),
4161          'htmlhint'   => array(
4162              'tagname-lowercase'        => true,
4163              'attr-lowercase'           => true,
4164              'attr-value-double-quotes' => false,
4165              'doctype-first'            => false,
4166              'tag-pair'                 => true,
4167              'spec-char-escape'         => true,
4168              'id-unique'                => true,
4169              'src-not-empty'            => true,
4170              'attr-no-duplication'      => true,
4171              'alt-require'              => true,
4172              'space-tab-mixed-disabled' => 'tab',
4173              'attr-unsafe-chars'        => true,
4174          ),
4175      );
4176  
4177      $type = '';
4178      if ( isset( $args['type'] ) ) {
4179          $type = $args['type'];
4180  
4181          // Remap MIME types to ones that CodeMirror modes will recognize.
4182          if ( 'application/x-patch' === $type || 'text/x-patch' === $type ) {
4183              $type = 'text/x-diff';
4184          }
4185      } elseif ( isset( $args['file'] ) && str_contains( basename( $args['file'] ), '.' ) ) {
4186          $extension = strtolower( pathinfo( $args['file'], PATHINFO_EXTENSION ) );
4187          foreach ( wp_get_mime_types() as $exts => $mime ) {
4188              if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
4189                  $type = $mime;
4190                  break;
4191              }
4192          }
4193  
4194          // Supply any types that are not matched by wp_get_mime_types().
4195          if ( empty( $type ) ) {
4196              switch ( $extension ) {
4197                  case 'conf':
4198                      $type = 'text/nginx';
4199                      break;
4200                  case 'css':
4201                      $type = 'text/css';
4202                      break;
4203                  case 'diff':
4204                  case 'patch':
4205                      $type = 'text/x-diff';
4206                      break;
4207                  case 'html':
4208                  case 'htm':
4209                      $type = 'text/html';
4210                      break;
4211                  case 'http':
4212                      $type = 'message/http';
4213                      break;
4214                  case 'js':
4215                      $type = 'text/javascript';
4216                      break;
4217                  case 'json':
4218                      $type = 'application/json';
4219                      break;
4220                  case 'jsx':
4221                      $type = 'text/jsx';
4222                      break;
4223                  case 'less':
4224                      $type = 'text/x-less';
4225                      break;
4226                  case 'md':
4227                      $type = 'text/x-gfm';
4228                      break;
4229                  case 'php':
4230                  case 'phtml':
4231                  case 'php3':
4232                  case 'php4':
4233                  case 'php5':
4234                  case 'php7':
4235                  case 'phps':
4236                      $type = 'application/x-httpd-php';
4237                      break;
4238                  case 'scss':
4239                      $type = 'text/x-scss';
4240                      break;
4241                  case 'sass':
4242                      $type = 'text/x-sass';
4243                      break;
4244                  case 'sh':
4245                  case 'bash':
4246                      $type = 'text/x-sh';
4247                      break;
4248                  case 'sql':
4249                      $type = 'text/x-sql';
4250                      break;
4251                  case 'svg':
4252                      $type = 'application/svg+xml';
4253                      break;
4254                  case 'xml':
4255                      $type = 'text/xml';
4256                      break;
4257                  case 'yml':
4258                  case 'yaml':
4259                      $type = 'text/x-yaml';
4260                      break;
4261                  case 'txt':
4262                  default:
4263                      $type = 'text/plain';
4264                      break;
4265              }
4266          }
4267      }
4268  
4269      if ( in_array( $type, array( 'text/css', 'text/x-scss', 'text/x-less', 'text/x-sass' ), true ) ) {
4270          $settings['codemirror'] = array_merge(
4271              $settings['codemirror'],
4272              array(
4273                  'mode'              => $type,
4274                  'lint'              => false,
4275                  'autoCloseBrackets' => true,
4276                  'matchBrackets'     => true,
4277              )
4278          );
4279      } elseif ( 'text/x-diff' === $type ) {
4280          $settings['codemirror'] = array_merge(
4281              $settings['codemirror'],
4282              array(
4283                  'mode' => 'diff',
4284              )
4285          );
4286      } elseif ( 'text/html' === $type ) {
4287          $settings['codemirror'] = array_merge(
4288              $settings['codemirror'],
4289              array(
4290                  'mode'              => 'htmlmixed',
4291                  'lint'              => true,
4292                  'autoCloseBrackets' => true,
4293                  'autoCloseTags'     => true,
4294                  'matchTags'         => array(
4295                      'bothTags' => true,
4296                  ),
4297              )
4298          );
4299  
4300          if ( ! current_user_can( 'unfiltered_html' ) ) {
4301              $settings['htmlhint']['kses'] = wp_kses_allowed_html( 'post' );
4302          }
4303      } elseif ( 'text/x-gfm' === $type ) {
4304          $settings['codemirror'] = array_merge(
4305              $settings['codemirror'],
4306              array(
4307                  'mode'                => 'gfm',
4308                  'highlightFormatting' => true,
4309              )
4310          );
4311      } elseif ( 'application/javascript' === $type || 'text/javascript' === $type ) {
4312          $settings['codemirror'] = array_merge(
4313              $settings['codemirror'],
4314              array(
4315                  'mode'              => 'javascript',
4316                  'lint'              => true,
4317                  'autoCloseBrackets' => true,
4318                  'matchBrackets'     => true,
4319              )
4320          );
4321      } elseif ( str_contains( $type, 'json' ) ) {
4322          $settings['codemirror'] = array_merge(
4323              $settings['codemirror'],
4324              array(
4325                  'mode'              => array(
4326                      'name' => 'javascript',
4327                  ),
4328                  'lint'              => true,
4329                  'autoCloseBrackets' => true,
4330                  'matchBrackets'     => true,
4331              )
4332          );
4333          if ( 'application/ld+json' === $type ) {
4334              $settings['codemirror']['mode']['jsonld'] = true;
4335          } else {
4336              $settings['codemirror']['mode']['json'] = true;
4337          }
4338      } elseif ( str_contains( $type, 'jsx' ) ) {
4339          $settings['codemirror'] = array_merge(
4340              $settings['codemirror'],
4341              array(
4342                  'mode'              => 'jsx',
4343                  'autoCloseBrackets' => true,
4344                  'matchBrackets'     => true,
4345              )
4346          );
4347      } elseif ( 'text/x-markdown' === $type ) {
4348          $settings['codemirror'] = array_merge(
4349              $settings['codemirror'],
4350              array(
4351                  'mode'                => 'markdown',
4352                  'highlightFormatting' => true,
4353              )
4354          );
4355      } elseif ( 'text/nginx' === $type ) {
4356          $settings['codemirror'] = array_merge(
4357              $settings['codemirror'],
4358              array(
4359                  'mode' => 'nginx',
4360              )
4361          );
4362      } elseif ( 'application/x-httpd-php' === $type ) {
4363          $settings['codemirror'] = array_merge(
4364              $settings['codemirror'],
4365              array(
4366                  'mode'              => 'php',
4367                  'autoCloseBrackets' => true,
4368                  'autoCloseTags'     => true,
4369                  'matchBrackets'     => true,
4370                  'matchTags'         => array(
4371                      'bothTags' => true,
4372                  ),
4373              )
4374          );
4375      } elseif ( 'text/x-sql' === $type || 'text/x-mysql' === $type ) {
4376          $settings['codemirror'] = array_merge(
4377              $settings['codemirror'],
4378              array(
4379                  'mode'              => 'sql',
4380                  'autoCloseBrackets' => true,
4381                  'matchBrackets'     => true,
4382              )
4383          );
4384      } elseif ( str_contains( $type, 'xml' ) ) {
4385          $settings['codemirror'] = array_merge(
4386              $settings['codemirror'],
4387              array(
4388                  'mode'              => 'xml',
4389                  'autoCloseBrackets' => true,
4390                  'autoCloseTags'     => true,
4391                  'matchTags'         => array(
4392                      'bothTags' => true,
4393                  ),
4394              )
4395          );
4396      } elseif ( 'text/x-yaml' === $type ) {
4397          $settings['codemirror'] = array_merge(
4398              $settings['codemirror'],
4399              array(
4400                  'mode' => 'yaml',
4401              )
4402          );
4403      } else {
4404          $settings['codemirror']['mode'] = $type;
4405      }
4406  
4407      if ( ! empty( $settings['codemirror']['lint'] ) ) {
4408          $settings['codemirror']['gutters'][] = 'CodeMirror-lint-markers';
4409      }
4410  
4411      // Let settings supplied via args override any defaults.
4412      foreach ( wp_array_slice_assoc( $args, array( 'codemirror', 'csslint', 'jshint', 'htmlhint' ) ) as $key => $value ) {
4413          $settings[ $key ] = array_merge(
4414              $settings[ $key ],
4415              $value
4416          );
4417      }
4418  
4419      /**
4420       * Filters settings that are passed into the code editor.
4421       *
4422       * Returning a falsey value will disable the syntax-highlighting code editor.
4423       *
4424       * @since 4.9.0
4425       *
4426       * @param array $settings The array of settings passed to the code editor.
4427       *                        A falsey value disables the editor.
4428       * @param array $args {
4429       *     Args passed when calling `get_code_editor_settings()`.
4430       *
4431       *     @type string   $type       The MIME type of the file to be edited.
4432       *     @type string   $file       Filename being edited.
4433       *     @type WP_Theme $theme      Theme being edited when on the theme file editor.
4434       *     @type string   $plugin     Plugin being edited when on the plugin file editor.
4435       *     @type array    $codemirror Additional CodeMirror setting overrides.
4436       *     @type array    $csslint    CSSLint rule overrides.
4437       *     @type array    $jshint     JSHint rule overrides.
4438       *     @type array    $htmlhint   HTMLHint rule overrides.
4439       * }
4440       */
4441      return apply_filters( 'wp_code_editor_settings', $settings, $args );
4442  }
4443  
4444  /**
4445   * Retrieves the contents of the search WordPress query variable.
4446   *
4447   * The search query string is passed through esc_attr() to ensure that it is safe
4448   * for placing in an HTML attribute.
4449   *
4450   * @since 2.3.0
4451   *
4452   * @param bool $escaped Whether the result is escaped. Default true.
4453   *                      Only use when you are later escaping it. Do not use unescaped.
4454   * @return string
4455   */
4456  function get_search_query( $escaped = true ) {
4457      /**
4458       * Filters the contents of the search query variable.
4459       *
4460       * @since 2.3.0
4461       *
4462       * @param mixed $search Contents of the search query variable.
4463       */
4464      $query = apply_filters( 'get_search_query', get_query_var( 's' ) );
4465  
4466      if ( $escaped ) {
4467          $query = esc_attr( $query );
4468      }
4469      return $query;
4470  }
4471  
4472  /**
4473   * Displays the contents of the search query variable.
4474   *
4475   * The search query string is passed through esc_attr() to ensure that it is safe
4476   * for placing in an HTML attribute.
4477   *
4478   * @since 2.1.0
4479   */
4480  function the_search_query() {
4481      /**
4482       * Filters the contents of the search query variable, for display.
4483       *
4484       * @since 2.3.0
4485       *
4486       * @param mixed $search Contents of the search query variable.
4487       */
4488      echo esc_attr( apply_filters( 'the_search_query', get_search_query( false ) ) );
4489  }
4490  
4491  /**
4492   * Gets the language attributes for the 'html' tag.
4493   *
4494   * Builds up a set of HTML attributes containing the text direction and language
4495   * information for the page.
4496   *
4497   * @since 4.3.0
4498   *
4499   * @param string $doctype Optional. The type of HTML document. Accepts 'xhtml' or 'html'. Default 'html'.
4500   * @return string A space-separated list of language attributes.
4501   */
4502  function get_language_attributes( $doctype = 'html' ) {
4503      $attributes = array();
4504  
4505      if ( function_exists( 'is_rtl' ) && is_rtl() ) {
4506          $attributes[] = 'dir="rtl"';
4507      }
4508  
4509      $lang = get_bloginfo( 'language' );
4510      if ( $lang ) {
4511          if ( 'text/html' === get_option( 'html_type' ) || 'html' === $doctype ) {
4512              $attributes[] = 'lang="' . esc_attr( $lang ) . '"';
4513          }
4514  
4515          if ( 'text/html' !== get_option( 'html_type' ) || 'xhtml' === $doctype ) {
4516              $attributes[] = 'xml:lang="' . esc_attr( $lang ) . '"';
4517          }
4518      }
4519  
4520      $output = implode( ' ', $attributes );
4521  
4522      /**
4523       * Filters the language attributes for display in the 'html' tag.
4524       *
4525       * @since 2.5.0
4526       * @since 4.3.0 Added the `$doctype` parameter.
4527       *
4528       * @param string $output A space-separated list of language attributes.
4529       * @param string $doctype The type of HTML document (xhtml|html).
4530       */
4531      return apply_filters( 'language_attributes', $output, $doctype );
4532  }
4533  
4534  /**
4535   * Displays the language attributes for the 'html' tag.
4536   *
4537   * Builds up a set of HTML attributes containing the text direction and language
4538   * information for the page.
4539   *
4540   * @since 2.1.0
4541   * @since 4.3.0 Converted into a wrapper for get_language_attributes().
4542   *
4543   * @param string $doctype Optional. The type of HTML document. Accepts 'xhtml' or 'html'. Default 'html'.
4544   */
4545  function language_attributes( $doctype = 'html' ) {
4546      echo get_language_attributes( $doctype );
4547  }
4548  
4549  /**
4550   * Retrieves paginated links for archive post pages.
4551   *
4552   * Technically, the function can be used to create paginated link list for any
4553   * area. The 'base' argument is used to reference the url, which will be used to
4554   * create the paginated links. The 'format' argument is then used for replacing
4555   * the page number. It is however, most likely and by default, to be used on the
4556   * archive post pages.
4557   *
4558   * The 'type' argument controls format of the returned value. The default is
4559   * 'plain', which is just a string with the links separated by a newline
4560   * character. The other possible values are either 'array' or 'list'. The
4561   * 'array' value will return an array of the paginated link list to offer full
4562   * control of display. The 'list' value will place all of the paginated links in
4563   * an unordered HTML list.
4564   *
4565   * The 'total' argument is the total amount of pages and is an integer. The
4566   * 'current' argument is the current page number and is also an integer.
4567   *
4568   * An example of the 'base' argument is "http://example.com/all_posts.php%_%"
4569   * and the '%_%' is required. The '%_%' will be replaced by the contents of in
4570   * the 'format' argument. An example for the 'format' argument is "?page=%#%"
4571   * and the '%#%' is also required. The '%#%' will be replaced with the page
4572   * number.
4573   *
4574   * You can include the previous and next links in the list by setting the
4575   * 'prev_next' argument to true, which it is by default. You can set the
4576   * previous text, by using the 'prev_text' argument. You can set the next text
4577   * by setting the 'next_text' argument.
4578   *
4579   * If the 'show_all' argument is set to true, then it will show all of the pages
4580   * instead of a short list of the pages near the current page. By default, the
4581   * 'show_all' is set to false and controlled by the 'end_size' and 'mid_size'
4582   * arguments. The 'end_size' argument is how many numbers on either the start
4583   * and the end list edges, by default is 1. The 'mid_size' argument is how many
4584   * numbers to either side of current page, but not including current page.
4585   *
4586   * It is possible to add query vars to the link by using the 'add_args' argument
4587   * and see add_query_arg() for more information.
4588   *
4589   * The 'before_page_number' and 'after_page_number' arguments allow users to
4590   * augment the links themselves. Typically this might be to add context to the
4591   * numbered links so that screen reader users understand what the links are for.
4592   * The text strings are added before and after the page number - within the
4593   * anchor tag.
4594   *
4595   * @since 2.1.0
4596   * @since 4.9.0 Added the `aria_current` argument.
4597   *
4598   * @global WP_Query   $wp_query   WordPress Query object.
4599   * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
4600   *
4601   * @param string|array $args {
4602   *     Optional. Array or string of arguments for generating paginated links for archives.
4603   *
4604   *     @type string $base               Base of the paginated url. Default empty.
4605   *     @type string $format             Format for the pagination structure. Default empty.
4606   *     @type int    $total              The total amount of pages. Default is the value WP_Query's
4607   *                                      `max_num_pages` or 1.
4608   *     @type int    $current            The current page number. Default is 'paged' query var or 1.
4609   *     @type string $aria_current       The value for the aria-current attribute. Possible values are 'page',
4610   *                                      'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'.
4611   *     @type bool   $show_all           Whether to show all pages. Default false.
4612   *     @type int    $end_size           How many numbers on either the start and the end list edges.
4613   *                                      Default 1.
4614   *     @type int    $mid_size           How many numbers to either side of the current pages. Default 2.
4615   *     @type bool   $prev_next          Whether to include the previous and next links in the list. Default true.
4616   *     @type string $prev_text          The previous page text. Default '&laquo; Previous'.
4617   *     @type string $next_text          The next page text. Default 'Next &raquo;'.
4618   *     @type string $type               Controls format of the returned value. Possible values are 'plain',
4619   *                                      'array' and 'list'. Default is 'plain'.
4620   *     @type array  $add_args           An array of query args to add. Default false.
4621   *     @type string $add_fragment       A string to append to each link. Default empty.
4622   *     @type string $before_page_number A string to appear before the page number. Default empty.
4623   *     @type string $after_page_number  A string to append after the page number. Default empty.
4624   * }
4625   * @return string|string[]|void String of page links or array of page links, depending on 'type' argument.
4626   *                              Void if total number of pages is less than 2.
4627   */
4628  function paginate_links( $args = '' ) {
4629      global $wp_query, $wp_rewrite;
4630  
4631      // Setting up default values based on the current URL.
4632      $pagenum_link = html_entity_decode( get_pagenum_link() );
4633      $url_parts    = explode( '?', $pagenum_link );
4634  
4635      // Get max pages and current page out of the current query, if available.
4636      $total   = isset( $wp_query->max_num_pages ) ? $wp_query->max_num_pages : 1;
4637      $current = get_query_var( 'paged' ) ? (int) get_query_var( 'paged' ) : 1;
4638  
4639      // Append the format placeholder to the base URL.
4640      $pagenum_link = trailingslashit( $url_parts[0] ) . '%_%';
4641  
4642      // URL base depends on permalink settings.
4643      $format  = $wp_rewrite->using_index_permalinks() && ! strpos( $pagenum_link, 'index.php' ) ? 'index.php/' : '';
4644      $format .= $wp_rewrite->using_permalinks() ? user_trailingslashit( $wp_rewrite->pagination_base . '/%#%', 'paged' ) : '?paged=%#%';
4645  
4646      $defaults = array(
4647          'base'               => $pagenum_link, // http://example.com/all_posts.php%_% : %_% is replaced by format (below).
4648          'format'             => $format, // ?page=%#% : %#% is replaced by the page number.
4649          'total'              => $total,
4650          'current'            => $current,
4651          'aria_current'       => 'page',
4652          'show_all'           => false,
4653          'prev_next'          => true,
4654          'prev_text'          => __( '&laquo; Previous' ),
4655          'next_text'          => __( 'Next &raquo;' ),
4656          'end_size'           => 1,
4657          'mid_size'           => 2,
4658          'type'               => 'plain',
4659          'add_args'           => array(), // Array of query args to add.
4660          'add_fragment'       => '',
4661          'before_page_number' => '',
4662          'after_page_number'  => '',
4663      );
4664  
4665      $args = wp_parse_args( $args, $defaults );
4666  
4667      if ( ! is_array( $args['add_args'] ) ) {
4668          $args['add_args'] = array();
4669      }
4670  
4671      // Merge additional query vars found in the original URL into 'add_args' array.
4672      if ( isset( $url_parts[1] ) ) {
4673          // Find the format argument.
4674          $format       = explode( '?', str_replace( '%_%', $args['format'], $args['base'] ) );
4675          $format_query = isset( $format[1] ) ? $format[1] : '';
4676          wp_parse_str( $format_query, $format_args );
4677  
4678          // Find the query args of the requested URL.
4679          wp_parse_str( $url_parts[1], $url_query_args );
4680  
4681          // Remove the format argument from the array of query arguments, to avoid overwriting custom format.
4682          foreach ( $format_args as $format_arg => $format_arg_value ) {
4683              unset( $url_query_args[ $format_arg ] );
4684          }
4685  
4686          $args['add_args'] = array_merge( $args['add_args'], urlencode_deep( $url_query_args ) );
4687      }
4688  
4689      // Who knows what else people pass in $args.
4690      $total = (int) $args['total'];
4691      if ( $total < 2 ) {
4692          return;
4693      }
4694      $current  = (int) $args['current'];
4695      $end_size = (int) $args['end_size']; // Out of bounds? Make it the default.
4696      if ( $end_size < 1 ) {
4697          $end_size = 1;
4698      }
4699      $mid_size = (int) $args['mid_size'];
4700      if ( $mid_size < 0 ) {
4701          $mid_size = 2;
4702      }
4703  
4704      $add_args   = $args['add_args'];
4705      $r          = '';
4706      $page_links = array();
4707      $dots       = false;
4708  
4709      if ( $args['prev_next'] && $current && 1 < $current ) :
4710          $link = str_replace( '%_%', 2 === $current ? '' : $args['format'], $args['base'] );
4711          $link = str_replace( '%#%', $current - 1, $link );
4712          if ( $add_args ) {
4713              $link = add_query_arg( $add_args, $link );
4714          }
4715          $link .= $args['add_fragment'];
4716  
4717          $page_links[] = sprintf(
4718              '<a class="prev page-numbers" href="%s">%s</a>',
4719              /**
4720               * Filters the paginated links for the given archive pages.
4721               *
4722               * @since 3.0.0
4723               *
4724               * @param string $link The paginated link URL.
4725               */
4726              esc_url( apply_filters( 'paginate_links', $link ) ),
4727              $args['prev_text']
4728          );
4729      endif;
4730  
4731      for ( $n = 1; $n <= $total; $n++ ) :
4732          if ( $n === $current ) :
4733              $page_links[] = sprintf(
4734                  '<span aria-current="%s" class="page-numbers current">%s</span>',
4735                  esc_attr( $args['aria_current'] ),
4736                  $args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
4737              );
4738  
4739              $dots = true;
4740          else :
4741              if ( $args['show_all'] || ( $n <= $end_size || ( $current && $n >= $current - $mid_size && $n <= $current + $mid_size ) || $n > $total - $end_size ) ) :
4742                  $link = str_replace( '%_%', 1 === $n ? '' : $args['format'], $args['base'] );
4743                  $link = str_replace( '%#%', $n, $link );
4744                  if ( $add_args ) {
4745                      $link = add_query_arg( $add_args, $link );
4746                  }
4747                  $link .= $args['add_fragment'];
4748  
4749                  $page_links[] = sprintf(
4750                      '<a class="page-numbers" href="%s">%s</a>',
4751                      /** This filter is documented in wp-includes/general-template.php */
4752                      esc_url( apply_filters( 'paginate_links', $link ) ),
4753                      $args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
4754                  );
4755  
4756                  $dots = true;
4757              elseif ( $dots && ! $args['show_all'] ) :
4758                  $page_links[] = '<span class="page-numbers dots">' . __( '&hellip;' ) . '</span>';
4759  
4760                  $dots = false;
4761              endif;
4762          endif;
4763      endfor;
4764  
4765      if ( $args['prev_next'] && $current && $current < $total ) :
4766          $link = str_replace( '%_%', $args['format'], $args['base'] );
4767          $link = str_replace( '%#%', $current + 1, $link );
4768          if ( $add_args ) {
4769              $link = add_query_arg( $add_args, $link );
4770          }
4771          $link .= $args['add_fragment'];
4772  
4773          $page_links[] = sprintf(
4774              '<a class="next page-numbers" href="%s">%s</a>',
4775              /** This filter is documented in wp-includes/general-template.php */
4776              esc_url( apply_filters( 'paginate_links', $link ) ),
4777              $args['next_text']
4778          );
4779      endif;
4780  
4781      switch ( $args['type'] ) {
4782          case 'array':
4783              return $page_links;
4784  
4785          case 'list':
4786              $r .= "<ul class='page-numbers'>\n\t<li>";
4787              $r .= implode( "</li>\n\t<li>", $page_links );
4788              $r .= "</li>\n</ul>\n";
4789              break;
4790  
4791          default:
4792              $r = implode( "\n", $page_links );
4793              break;
4794      }
4795  
4796      /**
4797       * Filters the HTML output of paginated links for archives.
4798       *
4799       * @since 5.7.0
4800       *
4801       * @param string $r    HTML output.
4802       * @param array  $args An array of arguments. See paginate_links()
4803       *                     for information on accepted arguments.
4804       */
4805      $r = apply_filters( 'paginate_links_output', $r, $args );
4806  
4807      return $r;
4808  }
4809  
4810  /**
4811   * Registers an admin color scheme css file.
4812   *
4813   * Allows a plugin to register a new admin color scheme. For example:
4814   *
4815   *     wp_admin_css_color( 'classic', __( 'Classic' ), admin_url( "css/colors-classic.css" ), array(
4816   *         '#07273E', '#14568A', '#D54E21', '#2683AE'
4817   *     ) );
4818   *
4819   * @since 2.5.0
4820   *
4821   * @global array $_wp_admin_css_colors
4822   *
4823   * @param string $key    The unique key for this theme.
4824   * @param string $name   The name of the theme.
4825   * @param string $url    The URL of the CSS file containing the color scheme.
4826   * @param array  $colors Optional. An array of CSS color definition strings which are used
4827   *                       to give the user a feel for the theme.
4828   * @param array  $icons {
4829   *     Optional. CSS color definitions used to color any SVG icons.
4830   *
4831   *     @type string $base    SVG icon base color.
4832   *     @type string $focus   SVG icon color on focus.
4833   *     @type string $current SVG icon color of current admin menu link.
4834   * }
4835   */
4836  function wp_admin_css_color( $key, $name, $url, $colors = array(), $icons = array() ) {
4837      global $_wp_admin_css_colors;
4838  
4839      if ( ! isset( $_wp_admin_css_colors ) ) {
4840          $_wp_admin_css_colors = array();
4841      }
4842  
4843      $_wp_admin_css_colors[ $key ] = (object) array(
4844          'name'        => $name,
4845          'url'         => $url,
4846          'colors'      => $colors,
4847          'icon_colors' => $icons,
4848      );
4849  }
4850  
4851  /**
4852   * Registers the default admin color schemes.
4853   *
4854   * Registers the initial set of eight color schemes in the Profile section
4855   * of the dashboard which allows for styling the admin menu and toolbar.
4856   *
4857   * @see wp_admin_css_color()
4858   *
4859   * @since 3.0.0
4860   */
4861  function register_admin_color_schemes() {
4862      $suffix  = is_rtl() ? '-rtl' : '';
4863      $suffix .= SCRIPT_DEBUG ? '' : '.min';
4864  
4865      wp_admin_css_color(
4866          'fresh',
4867          _x( 'Default', 'admin color scheme' ),
4868          false,
4869          array( '#1d2327', '#2c3338', '#2271b1', '#72aee6' ),
4870          array(
4871              'base'    => '#a7aaad',
4872              'focus'   => '#72aee6',
4873              'current' => '#fff',
4874          )
4875      );
4876  
4877      wp_admin_css_color(
4878          'light',
4879          _x( 'Light', 'admin color scheme' ),
4880          admin_url( "css/colors/light/colors$suffix.css" ),
4881          array( '#e5e5e5', '#999', '#d64e07', '#04a4cc' ),
4882          array(
4883              'base'    => '#999',
4884              'focus'   => '#ccc',
4885              'current' => '#ccc',
4886          )
4887      );
4888  
4889      wp_admin_css_color(
4890          'modern',
4891          _x( 'Modern', 'admin color scheme' ),
4892          admin_url( "css/colors/modern/colors$suffix.css" ),
4893          array( '#1e1e1e', '#3858e9', '#7b90ff' ),
4894          array(
4895              'base'    => '#f3f1f1',
4896              'focus'   => '#fff',
4897              'current' => '#fff',
4898          )
4899      );
4900  
4901      wp_admin_css_color(
4902          'blue',
4903          _x( 'Blue', 'admin color scheme' ),
4904          admin_url( "css/colors/blue/colors$suffix.css" ),
4905          array( '#096484', '#4796b3', '#52accc', '#74B6CE' ),
4906          array(
4907              'base'    => '#e5f8ff',
4908              'focus'   => '#fff',
4909              'current' => '#fff',
4910          )
4911      );
4912  
4913      wp_admin_css_color(
4914          'midnight',
4915          _x( 'Midnight', 'admin color scheme' ),
4916          admin_url( "css/colors/midnight/colors$suffix.css" ),
4917          array( '#25282b', '#363b3f', '#69a8bb', '#e14d43' ),
4918          array(
4919              'base'    => '#f1f2f3',
4920              'focus'   => '#fff',
4921              'current' => '#fff',
4922          )
4923      );
4924  
4925      wp_admin_css_color(
4926          'sunrise',
4927          _x( 'Sunrise', 'admin color scheme' ),
4928          admin_url( "css/colors/sunrise/colors$suffix.css" ),
4929          array( '#b43c38', '#cf4944', '#dd823b', '#ccaf0b' ),
4930          array(
4931              'base'    => '#f3f1f1',
4932              'focus'   => '#fff',
4933              'current' => '#fff',
4934          )
4935      );
4936  
4937      wp_admin_css_color(
4938          'ectoplasm',
4939          _x( 'Ectoplasm', 'admin color scheme' ),
4940          admin_url( "css/colors/ectoplasm/colors$suffix.css" ),
4941          array( '#413256', '#523f6d', '#a3b745', '#d46f15' ),
4942          array(
4943              'base'    => '#ece6f6',
4944              'focus'   => '#fff',
4945              'current' => '#fff',
4946          )
4947      );
4948  
4949      wp_admin_css_color(
4950          'ocean',
4951          _x( 'Ocean', 'admin color scheme' ),
4952          admin_url( "css/colors/ocean/colors$suffix.css" ),
4953          array( '#627c83', '#738e96', '#9ebaa0', '#aa9d88' ),
4954          array(
4955              'base'    => '#f2fcff',
4956              'focus'   => '#fff',
4957              'current' => '#fff',
4958          )
4959      );
4960  
4961      wp_admin_css_color(
4962          'coffee',
4963          _x( 'Coffee', 'admin color scheme' ),
4964          admin_url( "css/colors/coffee/colors$suffix.css" ),
4965          array( '#46403c', '#59524c', '#c7a589', '#9ea476' ),
4966          array(
4967              'base'    => '#f3f2f1',
4968              'focus'   => '#fff',
4969              'current' => '#fff',
4970          )
4971      );
4972  }
4973  
4974  /**
4975   * Displays the URL of a WordPress admin CSS file.
4976   *
4977   * @see WP_Styles::_css_href() and its {@see 'style_loader_src'} filter.
4978   *
4979   * @since 2.3.0
4980   *
4981   * @param string $file file relative to wp-admin/ without its ".css" extension.
4982   * @return string
4983   */
4984  function wp_admin_css_uri( $file = 'wp-admin' ) {
4985      if ( defined( 'WP_INSTALLING' ) ) {
4986          $_file = "./$file.css";
4987      } else {
4988          $_file = admin_url( "$file.css" );
4989      }
4990      $_file = add_query_arg( 'version', get_bloginfo( 'version' ), $_file );
4991  
4992      /**
4993       * Filters the URI of a WordPress admin CSS file.
4994       *
4995       * @since 2.3.0
4996       *
4997       * @param string $_file Relative path to the file with query arguments attached.
4998       * @param string $file  Relative path to the file, minus its ".css" extension.
4999       */
5000      return apply_filters( 'wp_admin_css_uri', $_file, $file );
5001  }
5002  
5003  /**
5004   * Enqueues or directly prints a stylesheet link to the specified CSS file.
5005   *
5006   * "Intelligently" decides to enqueue or to print the CSS file. If the
5007   * {@see 'wp_print_styles'} action has *not* yet been called, the CSS file will be
5008   * enqueued. If the {@see 'wp_print_styles'} action has been called, the CSS link will
5009   * be printed. Printing may be forced by passing true as the $force_echo
5010   * (second) parameter.
5011   *
5012   * For backward compatibility with WordPress 2.3 calling method: If the $file
5013   * (first) parameter does not correspond to a registered CSS file, we assume
5014   * $file is a file relative to wp-admin/ without its ".css" extension. A
5015   * stylesheet link to that generated URL is printed.
5016   *
5017   * @since 2.3.0
5018   *
5019   * @param string $file       Optional. Style handle name or file name (without ".css" extension) relative
5020   *                           to wp-admin/. Defaults to 'wp-admin'.
5021   * @param bool   $force_echo Optional. Force the stylesheet link to be printed rather than enqueued.
5022   */
5023  function wp_admin_css( $file = 'wp-admin', $force_echo = false ) {
5024      // For backward compatibility.
5025      $handle = str_starts_with( $file, 'css/' ) ? substr( $file, 4 ) : $file;
5026  
5027      if ( wp_styles()->query( $handle ) ) {
5028          if ( $force_echo || did_action( 'wp_print_styles' ) ) {
5029              // We already printed the style queue. Print this one immediately.
5030              wp_print_styles( $handle );
5031          } else {
5032              // Add to style queue.
5033              wp_enqueue_style( $handle );
5034          }
5035          return;
5036      }
5037  
5038      $stylesheet_link = sprintf(
5039          "<link rel='stylesheet' href='%s' type='text/css' />\n",
5040          esc_url( wp_admin_css_uri( $file ) )
5041      );
5042  
5043      /**
5044       * Filters the stylesheet link to the specified CSS file.
5045       *
5046       * If the site is set to display right-to-left, the RTL stylesheet link
5047       * will be used instead.
5048       *
5049       * @since 2.3.0
5050       * @param string $stylesheet_link HTML link element for the stylesheet.
5051       * @param string $file            Style handle name or filename (without ".css" extension)
5052       *                                relative to wp-admin/. Defaults to 'wp-admin'.
5053       */
5054      echo apply_filters( 'wp_admin_css', $stylesheet_link, $file );
5055  
5056      if ( function_exists( 'is_rtl' ) && is_rtl() ) {
5057          $rtl_stylesheet_link = sprintf(
5058              "<link rel='stylesheet' href='%s' type='text/css' />\n",
5059              esc_url( wp_admin_css_uri( "$file-rtl" ) )
5060          );
5061  
5062          /** This filter is documented in wp-includes/general-template.php */
5063          echo apply_filters( 'wp_admin_css', $rtl_stylesheet_link, "$file-rtl" );
5064      }
5065  }
5066  
5067  /**
5068   * Enqueues the default ThickBox js and css.
5069   *
5070   * If any of the settings need to be changed, this can be done with another js
5071   * file similar to media-upload.js. That file should
5072   * require array('thickbox') to ensure it is loaded after.
5073   *
5074   * @since 2.5.0
5075   */
5076  function add_thickbox() {
5077      wp_enqueue_script( 'thickbox' );
5078      wp_enqueue_style( 'thickbox' );
5079  
5080      if ( is_network_admin() ) {
5081          add_action( 'admin_head', '_thickbox_path_admin_subfolder' );
5082      }
5083  }
5084  
5085  /**
5086   * Displays the XHTML generator that is generated on the wp_head hook.
5087   *
5088   * See {@see 'wp_head'}.
5089   *
5090   * @since 2.5.0
5091   */
5092  function wp_generator() {
5093      /**
5094       * Filters the output of the XHTML generator tag.
5095       *
5096       * @since 2.5.0
5097       *
5098       * @param string $generator_type The XHTML generator.
5099       */
5100      the_generator( apply_filters( 'wp_generator_type', 'xhtml' ) );
5101  }
5102  
5103  /**
5104   * Displays the generator XML or Comment for RSS, ATOM, etc.
5105   *
5106   * Returns the correct generator type for the requested output format. Allows
5107   * for a plugin to filter generators overall the {@see 'the_generator'} filter.
5108   *
5109   * @since 2.5.0
5110   *
5111   * @param string $type The type of generator to output - (html|xhtml|atom|rss2|rdf|comment|export).
5112   */
5113  function the_generator( $type ) {
5114      /**
5115       * Filters the output of the XHTML generator tag, for display.
5116       *
5117       * @since 2.5.0
5118       *
5119       * @param string $generator_type The generator output.
5120       * @param string $type           The type of generator to output. Accepts 'html',
5121       *                               'xhtml', 'atom', 'rss2', 'rdf', 'comment', 'export'.
5122       */
5123      echo apply_filters( 'the_generator', get_the_generator( $type ), $type ) . "\n";
5124  }
5125  
5126  /**
5127   * Creates the generator XML or Comment for RSS, ATOM, etc.
5128   *
5129   * Returns the correct generator type for the requested output format. Allows
5130   * for a plugin to filter generators on an individual basis using the
5131   * {@see 'get_the_generator_$type'} filter.
5132   *
5133   * @since 2.5.0
5134   *
5135   * @param string $type The type of generator to return - (html|xhtml|atom|rss2|rdf|comment|export).
5136   * @return string|void The HTML content for the generator.
5137   */
5138  function get_the_generator( $type = '' ) {
5139      if ( empty( $type ) ) {
5140  
5141          $current_filter = current_filter();
5142          if ( empty( $current_filter ) ) {
5143              return;
5144          }
5145  
5146          switch ( $current_filter ) {
5147              case 'rss2_head':
5148              case 'commentsrss2_head':
5149                  $type = 'rss2';
5150                  break;
5151              case 'rss_head':
5152              case 'opml_head':
5153                  $type = 'comment';
5154                  break;
5155              case 'rdf_header':
5156                  $type = 'rdf';
5157                  break;
5158              case 'atom_head':
5159              case 'comments_atom_head':
5160              case 'app_head':
5161                  $type = 'atom';
5162                  break;
5163          }
5164      }
5165  
5166      switch ( $type ) {
5167          case 'html':
5168              $gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '">';
5169              break;
5170          case 'xhtml':
5171              $gen = '<meta name="generator" content="WordPress ' . esc_attr( get_bloginfo( 'version' ) ) . '" />';
5172              break;
5173          case 'atom':
5174              $gen = '<generator uri="https://wordpress.org/" version="' . esc_attr( get_bloginfo_rss( 'version' ) ) . '">WordPress</generator>';
5175              break;
5176          case 'rss2':
5177              $gen = '<generator>' . sanitize_url( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '</generator>';
5178              break;
5179          case 'rdf':
5180              $gen = '<admin:generatorAgent rdf:resource="' . sanitize_url( 'https://wordpress.org/?v=' . get_bloginfo_rss( 'version' ) ) . '" />';
5181              break;
5182          case 'comment':
5183              $gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo( 'version' ) ) . '" -->';
5184              break;
5185          case 'export':
5186              $gen = '<!-- generator="WordPress/' . esc_attr( get_bloginfo_rss( 'version' ) ) . '" created="' . gmdate( 'Y-m-d H:i' ) . '" -->';
5187              break;
5188      }
5189  
5190      /**
5191       * Filters the HTML for the retrieved generator type.
5192       *
5193       * The dynamic portion of the hook name, `$type`, refers to the generator type.
5194       *
5195       * Possible hook names include:
5196       *
5197       *  - `get_the_generator_atom`
5198       *  - `get_the_generator_comment`
5199       *  - `get_the_generator_export`
5200       *  - `get_the_generator_html`
5201       *  - `get_the_generator_rdf`
5202       *  - `get_the_generator_rss2`
5203       *  - `get_the_generator_xhtml`
5204       *
5205       * @since 2.5.0
5206       *
5207       * @param string $gen  The HTML markup output to wp_head().
5208       * @param string $type The type of generator. Accepts 'html', 'xhtml', 'atom',
5209       *                     'rss2', 'rdf', 'comment', 'export'.
5210       */
5211      return apply_filters( "get_the_generator_{$type}", $gen, $type );
5212  }
5213  
5214  /**
5215   * Outputs the HTML checked attribute.
5216   *
5217   * Compares the first two arguments and if identical marks as checked.
5218   *
5219   * @since 1.0.0
5220   *
5221   * @param mixed $checked One of the values to compare.
5222   * @param mixed $current Optional. The other value to compare if not just true.
5223   *                       Default true.
5224   * @param bool  $display Optional. Whether to echo or just return the string.
5225   *                       Default true.
5226   * @return string HTML attribute or empty string.
5227   */
5228  function checked( $checked, $current = true, $display = true ) {
5229      return __checked_selected_helper( $checked, $current, $display, 'checked' );
5230  }
5231  
5232  /**
5233   * Outputs the HTML selected attribute.
5234   *
5235   * Compares the first two arguments and if identical marks as selected.
5236   *
5237   * @since 1.0.0
5238   *
5239   * @param mixed $selected One of the values to compare.
5240   * @param mixed $current  Optional. The other value to compare if not just true.
5241   *                        Default true.
5242   * @param bool  $display  Optional. Whether to echo or just return the string.
5243   *                        Default true.
5244   * @return string HTML attribute or empty string.
5245   */
5246  function selected( $selected, $current = true, $display = true ) {
5247      return __checked_selected_helper( $selected, $current, $display, 'selected' );
5248  }
5249  
5250  /**
5251   * Outputs the HTML disabled attribute.
5252   *
5253   * Compares the first two arguments and if identical marks as disabled.
5254   *
5255   * @since 3.0.0
5256   *
5257   * @param mixed $disabled One of the values to compare.
5258   * @param mixed $current  Optional. The other value to compare if not just true.
5259   *                        Default true.
5260   * @param bool  $display  Optional. Whether to echo or just return the string.
5261   *                        Default true.
5262   * @return string HTML attribute or empty string.
5263   */
5264  function disabled( $disabled, $current = true, $display = true ) {
5265      return __checked_selected_helper( $disabled, $current, $display, 'disabled' );
5266  }
5267  
5268  /**
5269   * Outputs the HTML readonly attribute.
5270   *
5271   * Compares the first two arguments and if identical marks as readonly.
5272   *
5273   * @since 5.9.0
5274   *
5275   * @param mixed $readonly_value One of the values to compare.
5276   * @param mixed $current        Optional. The other value to compare if not just true.
5277   *                              Default true.
5278   * @param bool  $display        Optional. Whether to echo or just return the string.
5279   *                              Default true.
5280   * @return string HTML attribute or empty string.
5281   */
5282  function wp_readonly( $readonly_value, $current = true, $display = true ) {
5283      return __checked_selected_helper( $readonly_value, $current, $display, 'readonly' );
5284  }
5285  
5286  /*
5287   * Include a compat `readonly()` function on PHP < 8.1. Since PHP 8.1,
5288   * `readonly` is a reserved keyword and cannot be used as a function name.
5289   * In order to avoid PHP parser errors, this function was extracted
5290   * to a separate file and is only included conditionally on PHP < 8.1.
5291   */
5292  if ( PHP_VERSION_ID < 80100 ) {
5293      require_once  __DIR__ . '/php-compat/readonly.php';
5294  }
5295  
5296  /**
5297   * Private helper function for checked, selected, disabled and readonly.
5298   *
5299   * Compares the first two arguments and if identical marks as `$type`.
5300   *
5301   * @since 2.8.0
5302   * @access private
5303   *
5304   * @param mixed  $helper  One of the values to compare.
5305   * @param mixed  $current The other value to compare if not just true.
5306   * @param bool   $display Whether to echo or just return the string.
5307   * @param string $type    The type of checked|selected|disabled|readonly we are doing.
5308   * @return string HTML attribute or empty string.
5309   */
5310  function __checked_selected_helper( $helper, $current, $display, $type ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore
5311      if ( (string) $helper === (string) $current ) {
5312          $result = " $type='$type'";
5313      } else {
5314          $result = '';
5315      }
5316  
5317      if ( $display ) {
5318          echo $result;
5319      }
5320  
5321      return $result;
5322  }
5323  
5324  /**
5325   * Assigns a visual indicator for required form fields.
5326   *
5327   * @since 6.1.0
5328   *
5329   * @return string Indicator glyph wrapped in a `span` tag.
5330   */
5331  function wp_required_field_indicator() {
5332      /* translators: Character to identify required form fields. */
5333      $glyph     = __( '*' );
5334      $indicator = '<span class="required">' . esc_html( $glyph ) . '</span>';
5335  
5336      /**
5337       * Filters the markup for a visual indicator of required form fields.
5338       *
5339       * @since 6.1.0
5340       *
5341       * @param string $indicator Markup for the indicator element.
5342       */
5343      return apply_filters( 'wp_required_field_indicator', $indicator );
5344  }
5345  
5346  /**
5347   * Creates a message to explain required form fields.
5348   *
5349   * @since 6.1.0
5350   *
5351   * @return string Message text and glyph wrapped in a `span` tag.
5352   */
5353  function wp_required_field_message() {
5354      $message = sprintf(
5355          '<span class="required-field-message">%s</span>',
5356          /* translators: %s: Asterisk symbol (*). */
5357          sprintf( __( 'Required fields are marked %s' ), wp_required_field_indicator() )
5358      );
5359  
5360      /**
5361       * Filters the message to explain required form fields.
5362       *
5363       * @since 6.1.0
5364       *
5365       * @param string $message Message text and glyph wrapped in a `span` tag.
5366       */
5367      return apply_filters( 'wp_required_field_message', $message );
5368  }
5369  
5370  /**
5371   * Default settings for heartbeat.
5372   *
5373   * Outputs the nonce used in the heartbeat XHR.
5374   *
5375   * @since 3.6.0
5376   *
5377   * @param array $settings
5378   * @return array Heartbeat settings.
5379   */
5380  function wp_heartbeat_settings( $settings ) {
5381      if ( ! is_admin() ) {
5382          $settings['ajaxurl'] = admin_url( 'admin-ajax.php', 'relative' );
5383      }
5384  
5385      if ( is_user_logged_in() ) {
5386          $settings['nonce'] = wp_create_nonce( 'heartbeat-nonce' );
5387      }
5388  
5389      return $settings;
5390  }


Generated : Sun Mar 9 08:20:01 2025 Cross-referenced by PHPXref