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/wp-includes/ -> pluggable.php (source)

   1  <?php
   2  /**
   3   * These functions can be replaced via plugins. If plugins do not redefine these
   4   * functions, then these will be used instead.
   5   *
   6   * @package WordPress
   7   */
   8  
   9  if ( ! function_exists( 'wp_set_current_user' ) ) :
  10      /**
  11       * Changes the current user by ID or name.
  12       *
  13       * Set $id to null and specify a name if you do not know a user's ID.
  14       *
  15       * Some WordPress functionality is based on the current user and not based on
  16       * the signed in user. Therefore, it opens the ability to edit and perform
  17       * actions on users who aren't signed in.
  18       *
  19       * @since 2.0.3
  20       *
  21       * @global WP_User $current_user The current user object which holds the user data.
  22       *
  23       * @param int    $id   User ID
  24       * @param string $name User's username
  25       * @return WP_User Current user User object
  26       */
  27  	function wp_set_current_user( $id, $name = '' ) {
  28          global $current_user;
  29  
  30          // If `$id` matches the current user, there is nothing to do.
  31          if ( isset( $current_user )
  32          && ( $current_user instanceof WP_User )
  33          && ( $id == $current_user->ID )
  34          && ( null !== $id )
  35          ) {
  36              return $current_user;
  37          }
  38  
  39          $current_user = new WP_User( $id, $name );
  40  
  41          setup_userdata( $current_user->ID );
  42  
  43          /**
  44           * Fires after the current user is set.
  45           *
  46           * @since 2.0.1
  47           */
  48          do_action( 'set_current_user' );
  49  
  50          return $current_user;
  51      }
  52  endif;
  53  
  54  if ( ! function_exists( 'wp_get_current_user' ) ) :
  55      /**
  56       * Retrieve the current user object.
  57       *
  58       * Will set the current user, if the current user is not set. The current user
  59       * will be set to the logged-in person. If no user is logged-in, then it will
  60       * set the current user to 0, which is invalid and won't have any permissions.
  61       *
  62       * @since 2.0.3
  63       *
  64       * @see _wp_get_current_user()
  65       * @global WP_User $current_user Checks if the current user is set.
  66       *
  67       * @return WP_User Current WP_User instance.
  68       */
  69  	function wp_get_current_user() {
  70          return _wp_get_current_user();
  71      }
  72  endif;
  73  
  74  if ( ! function_exists( 'get_userdata' ) ) :
  75      /**
  76       * Retrieve user info by user ID.
  77       *
  78       * @since 0.71
  79       *
  80       * @param int $user_id User ID
  81       * @return WP_User|false WP_User object on success, false on failure.
  82       */
  83  	function get_userdata( $user_id ) {
  84          return get_user_by( 'id', $user_id );
  85      }
  86  endif;
  87  
  88  if ( ! function_exists( 'get_user_by' ) ) :
  89      /**
  90       * Retrieve user info by a given field
  91       *
  92       * @since 2.8.0
  93       * @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
  94       *
  95       * @param string     $field The field to retrieve the user with. id | ID | slug | email | login.
  96       * @param int|string $value A value for $field. A user ID, slug, email address, or login name.
  97       * @return WP_User|false WP_User object on success, false on failure.
  98       */
  99  	function get_user_by( $field, $value ) {
 100          $userdata = WP_User::get_data_by( $field, $value );
 101  
 102          if ( ! $userdata ) {
 103              return false;
 104          }
 105  
 106          $user = new WP_User;
 107          $user->init( $userdata );
 108  
 109          return $user;
 110      }
 111  endif;
 112  
 113  if ( ! function_exists( 'cache_users' ) ) :
 114      /**
 115       * Retrieve info for user lists to prevent multiple queries by get_userdata()
 116       *
 117       * @since 3.0.0
 118       *
 119       * @global wpdb $wpdb WordPress database abstraction object.
 120       *
 121       * @param array $user_ids User ID numbers list
 122       */
 123  	function cache_users( $user_ids ) {
 124          global $wpdb;
 125  
 126          $clean = _get_non_cached_ids( $user_ids, 'users' );
 127  
 128          if ( empty( $clean ) ) {
 129              return;
 130          }
 131  
 132          $list = implode( ',', $clean );
 133  
 134          $users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
 135  
 136          $ids = array();
 137          foreach ( $users as $user ) {
 138              update_user_caches( $user );
 139              $ids[] = $user->ID;
 140          }
 141          update_meta_cache( 'user', $ids );
 142      }
 143  endif;
 144  
 145  if ( ! function_exists( 'wp_mail' ) ) :
 146      /**
 147       * Sends an email, similar to PHP's mail function.
 148       *
 149       * A true return value does not automatically mean that the user received the
 150       * email successfully. It just only means that the method used was able to
 151       * process the request without any errors.
 152       *
 153       * The default content type is `text/plain` which does not allow using HTML.
 154       * However, you can set the content type of the email by using the
 155       * {@see 'wp_mail_content_type'} filter.
 156       *
 157       * The default charset is based on the charset used on the blog. The charset can
 158       * be set using the {@see 'wp_mail_charset'} filter.
 159       *
 160       * @since 1.2.1
 161       *
 162       * @global PHPMailer\PHPMailer\PHPMailer $phpmailer
 163       *
 164       * @param string|string[] $to          Array or comma-separated list of email addresses to send message.
 165       * @param string          $subject     Email subject.
 166       * @param string          $message     Message contents.
 167       * @param string|string[] $headers     Optional. Additional headers.
 168       * @param string|string[] $attachments Optional. Paths to files to attach.
 169       * @return bool Whether the email was sent successfully.
 170       */
 171  	function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
 172          // Compact the input, apply the filters, and extract them back out.
 173  
 174          /**
 175           * Filters the wp_mail() arguments.
 176           *
 177           * @since 2.2.0
 178           *
 179           * @param array $args {
 180           *     Array of the `wp_mail()` arguments.
 181           *
 182           *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 183           *     @type string          $subject     Email subject.
 184           *     @type string          $message     Message contents.
 185           *     @type string|string[] $headers     Additional headers.
 186           *     @type string|string[] $attachments Paths to files to attach.
 187           * }
 188           */
 189          $atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) );
 190  
 191          /**
 192           * Filters whether to preempt sending an email.
 193           *
 194           * Returning a non-null value will short-circuit {@see wp_mail()}, returning
 195           * that value instead. A boolean return value should be used to indicate whether
 196           * the email was successfully sent.
 197           *
 198           * @since 5.7.0
 199           *
 200           * @param null|bool $return Short-circuit return value.
 201           * @param array     $atts {
 202           *     Array of the `wp_mail()` arguments.
 203           *
 204           *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 205           *     @type string          $subject     Email subject.
 206           *     @type string          $message     Message contents.
 207           *     @type string|string[] $headers     Additional headers.
 208           *     @type string|string[] $attachments Paths to files to attach.
 209           * }
 210           */
 211          $pre_wp_mail = apply_filters( 'pre_wp_mail', null, $atts );
 212  
 213          if ( null !== $pre_wp_mail ) {
 214              return $pre_wp_mail;
 215          }
 216  
 217          if ( isset( $atts['to'] ) ) {
 218              $to = $atts['to'];
 219          }
 220  
 221          if ( ! is_array( $to ) ) {
 222              $to = explode( ',', $to );
 223          }
 224  
 225          if ( isset( $atts['subject'] ) ) {
 226              $subject = $atts['subject'];
 227          }
 228  
 229          if ( isset( $atts['message'] ) ) {
 230              $message = $atts['message'];
 231          }
 232  
 233          if ( isset( $atts['headers'] ) ) {
 234              $headers = $atts['headers'];
 235          }
 236  
 237          if ( isset( $atts['attachments'] ) ) {
 238              $attachments = $atts['attachments'];
 239          }
 240  
 241          if ( ! is_array( $attachments ) ) {
 242              $attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
 243          }
 244          global $phpmailer;
 245  
 246          // (Re)create it, if it's gone missing.
 247          if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
 248              require_once  ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
 249              require_once  ABSPATH . WPINC . '/PHPMailer/SMTP.php';
 250              require_once  ABSPATH . WPINC . '/PHPMailer/Exception.php';
 251              $phpmailer = new PHPMailer\PHPMailer\PHPMailer( true );
 252  
 253              $phpmailer::$validator = static function ( $email ) {
 254                  return (bool) is_email( $email );
 255              };
 256          }
 257  
 258          // Headers.
 259          $cc       = array();
 260          $bcc      = array();
 261          $reply_to = array();
 262  
 263          if ( empty( $headers ) ) {
 264              $headers = array();
 265          } else {
 266              if ( ! is_array( $headers ) ) {
 267                  // Explode the headers out, so this function can take
 268                  // both string headers and an array of headers.
 269                  $tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
 270              } else {
 271                  $tempheaders = $headers;
 272              }
 273              $headers = array();
 274  
 275              // If it's actually got contents.
 276              if ( ! empty( $tempheaders ) ) {
 277                  // Iterate through the raw headers.
 278                  foreach ( (array) $tempheaders as $header ) {
 279                      if ( strpos( $header, ':' ) === false ) {
 280                          if ( false !== stripos( $header, 'boundary=' ) ) {
 281                              $parts    = preg_split( '/boundary=/i', trim( $header ) );
 282                              $boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
 283                          }
 284                          continue;
 285                      }
 286                      // Explode them out.
 287                      list( $name, $content ) = explode( ':', trim( $header ), 2 );
 288  
 289                      // Cleanup crew.
 290                      $name    = trim( $name );
 291                      $content = trim( $content );
 292  
 293                      switch ( strtolower( $name ) ) {
 294                          // Mainly for legacy -- process a "From:" header if it's there.
 295                          case 'from':
 296                              $bracket_pos = strpos( $content, '<' );
 297                              if ( false !== $bracket_pos ) {
 298                                  // Text before the bracketed email is the "From" name.
 299                                  if ( $bracket_pos > 0 ) {
 300                                      $from_name = substr( $content, 0, $bracket_pos - 1 );
 301                                      $from_name = str_replace( '"', '', $from_name );
 302                                      $from_name = trim( $from_name );
 303                                  }
 304  
 305                                  $from_email = substr( $content, $bracket_pos + 1 );
 306                                  $from_email = str_replace( '>', '', $from_email );
 307                                  $from_email = trim( $from_email );
 308  
 309                                  // Avoid setting an empty $from_email.
 310                              } elseif ( '' !== trim( $content ) ) {
 311                                  $from_email = trim( $content );
 312                              }
 313                              break;
 314                          case 'content-type':
 315                              if ( strpos( $content, ';' ) !== false ) {
 316                                  list( $type, $charset_content ) = explode( ';', $content );
 317                                  $content_type                   = trim( $type );
 318                                  if ( false !== stripos( $charset_content, 'charset=' ) ) {
 319                                      $charset = trim( str_replace( array( 'charset=', '"' ), '', $charset_content ) );
 320                                  } elseif ( false !== stripos( $charset_content, 'boundary=' ) ) {
 321                                      $boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset_content ) );
 322                                      $charset  = '';
 323                                  }
 324  
 325                                  // Avoid setting an empty $content_type.
 326                              } elseif ( '' !== trim( $content ) ) {
 327                                  $content_type = trim( $content );
 328                              }
 329                              break;
 330                          case 'cc':
 331                              $cc = array_merge( (array) $cc, explode( ',', $content ) );
 332                              break;
 333                          case 'bcc':
 334                              $bcc = array_merge( (array) $bcc, explode( ',', $content ) );
 335                              break;
 336                          case 'reply-to':
 337                              $reply_to = array_merge( (array) $reply_to, explode( ',', $content ) );
 338                              break;
 339                          default:
 340                              // Add it to our grand headers array.
 341                              $headers[ trim( $name ) ] = trim( $content );
 342                              break;
 343                      }
 344                  }
 345              }
 346          }
 347  
 348          // Empty out the values that may be set.
 349          $phpmailer->clearAllRecipients();
 350          $phpmailer->clearAttachments();
 351          $phpmailer->clearCustomHeaders();
 352          $phpmailer->clearReplyTos();
 353  
 354          // Set "From" name and email.
 355  
 356          // If we don't have a name from the input headers.
 357          if ( ! isset( $from_name ) ) {
 358              $from_name = 'WordPress';
 359          }
 360  
 361          /*
 362           * If we don't have an email from the input headers, default to wordpress@$sitename
 363           * Some hosts will block outgoing mail from this address if it doesn't exist,
 364           * but there's no easy alternative. Defaulting to admin_email might appear to be
 365           * another option, but some hosts may refuse to relay mail from an unknown domain.
 366           * See https://core.trac.wordpress.org/ticket/5007.
 367           */
 368          if ( ! isset( $from_email ) ) {
 369              // Get the site domain and get rid of www.
 370              $sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
 371              if ( 'www.' === substr( $sitename, 0, 4 ) ) {
 372                  $sitename = substr( $sitename, 4 );
 373              }
 374  
 375              $from_email = 'wordpress@' . $sitename;
 376          }
 377  
 378          /**
 379           * Filters the email address to send from.
 380           *
 381           * @since 2.2.0
 382           *
 383           * @param string $from_email Email address to send from.
 384           */
 385          $from_email = apply_filters( 'wp_mail_from', $from_email );
 386  
 387          /**
 388           * Filters the name to associate with the "from" email address.
 389           *
 390           * @since 2.3.0
 391           *
 392           * @param string $from_name Name associated with the "from" email address.
 393           */
 394          $from_name = apply_filters( 'wp_mail_from_name', $from_name );
 395  
 396          try {
 397              $phpmailer->setFrom( $from_email, $from_name, false );
 398          } catch ( PHPMailer\PHPMailer\Exception $e ) {
 399              $mail_error_data                             = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
 400              $mail_error_data['phpmailer_exception_code'] = $e->getCode();
 401  
 402              /** This filter is documented in wp-includes/pluggable.php */
 403              do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );
 404  
 405              return false;
 406          }
 407  
 408          // Set mail's subject and body.
 409          $phpmailer->Subject = $subject;
 410          $phpmailer->Body    = $message;
 411  
 412          // Set destination addresses, using appropriate methods for handling addresses.
 413          $address_headers = compact( 'to', 'cc', 'bcc', 'reply_to' );
 414  
 415          foreach ( $address_headers as $address_header => $addresses ) {
 416              if ( empty( $addresses ) ) {
 417                  continue;
 418              }
 419  
 420              foreach ( (array) $addresses as $address ) {
 421                  try {
 422                      // Break $recipient into name and address parts if in the format "Foo <bar@baz.com>".
 423                      $recipient_name = '';
 424  
 425                      if ( preg_match( '/(.*)<(.+)>/', $address, $matches ) ) {
 426                          if ( count( $matches ) == 3 ) {
 427                              $recipient_name = $matches[1];
 428                              $address        = $matches[2];
 429                          }
 430                      }
 431  
 432                      switch ( $address_header ) {
 433                          case 'to':
 434                              $phpmailer->addAddress( $address, $recipient_name );
 435                              break;
 436                          case 'cc':
 437                              $phpmailer->addCc( $address, $recipient_name );
 438                              break;
 439                          case 'bcc':
 440                              $phpmailer->addBcc( $address, $recipient_name );
 441                              break;
 442                          case 'reply_to':
 443                              $phpmailer->addReplyTo( $address, $recipient_name );
 444                              break;
 445                      }
 446                  } catch ( PHPMailer\PHPMailer\Exception $e ) {
 447                      continue;
 448                  }
 449              }
 450          }
 451  
 452          // Set to use PHP's mail().
 453          $phpmailer->isMail();
 454  
 455          // Set Content-Type and charset.
 456  
 457          // If we don't have a content-type from the input headers.
 458          if ( ! isset( $content_type ) ) {
 459              $content_type = 'text/plain';
 460          }
 461  
 462          /**
 463           * Filters the wp_mail() content type.
 464           *
 465           * @since 2.3.0
 466           *
 467           * @param string $content_type Default wp_mail() content type.
 468           */
 469          $content_type = apply_filters( 'wp_mail_content_type', $content_type );
 470  
 471          $phpmailer->ContentType = $content_type;
 472  
 473          // Set whether it's plaintext, depending on $content_type.
 474          if ( 'text/html' === $content_type ) {
 475              $phpmailer->isHTML( true );
 476          }
 477  
 478          // If we don't have a charset from the input headers.
 479          if ( ! isset( $charset ) ) {
 480              $charset = get_bloginfo( 'charset' );
 481          }
 482  
 483          /**
 484           * Filters the default wp_mail() charset.
 485           *
 486           * @since 2.3.0
 487           *
 488           * @param string $charset Default email charset.
 489           */
 490          $phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );
 491  
 492          // Set custom headers.
 493          if ( ! empty( $headers ) ) {
 494              foreach ( (array) $headers as $name => $content ) {
 495                  // Only add custom headers not added automatically by PHPMailer.
 496                  if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer' ), true ) ) {
 497                      try {
 498                          $phpmailer->addCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
 499                      } catch ( PHPMailer\PHPMailer\Exception $e ) {
 500                          continue;
 501                      }
 502                  }
 503              }
 504  
 505              if ( false !== stripos( $content_type, 'multipart' ) && ! empty( $boundary ) ) {
 506                  $phpmailer->addCustomHeader( sprintf( 'Content-Type: %s; boundary="%s"', $content_type, $boundary ) );
 507              }
 508          }
 509  
 510          if ( ! empty( $attachments ) ) {
 511              foreach ( $attachments as $attachment ) {
 512                  try {
 513                      $phpmailer->addAttachment( $attachment );
 514                  } catch ( PHPMailer\PHPMailer\Exception $e ) {
 515                      continue;
 516                  }
 517              }
 518          }
 519  
 520          /**
 521           * Fires after PHPMailer is initialized.
 522           *
 523           * @since 2.2.0
 524           *
 525           * @param PHPMailer $phpmailer The PHPMailer instance (passed by reference).
 526           */
 527          do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );
 528  
 529          // Send!
 530          try {
 531              return $phpmailer->send();
 532          } catch ( PHPMailer\PHPMailer\Exception $e ) {
 533  
 534              $mail_error_data                             = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
 535              $mail_error_data['phpmailer_exception_code'] = $e->getCode();
 536  
 537              /**
 538               * Fires after a PHPMailer\PHPMailer\Exception is caught.
 539               *
 540               * @since 4.4.0
 541               *
 542               * @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array
 543               *                        containing the mail recipient, subject, message, headers, and attachments.
 544               */
 545              do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );
 546  
 547              return false;
 548          }
 549      }
 550  endif;
 551  
 552  if ( ! function_exists( 'wp_authenticate' ) ) :
 553      /**
 554       * Authenticate a user, confirming the login credentials are valid.
 555       *
 556       * @since 2.5.0
 557       * @since 4.5.0 `$username` now accepts an email address.
 558       *
 559       * @param string $username User's username or email address.
 560       * @param string $password User's password.
 561       * @return WP_User|WP_Error WP_User object if the credentials are valid,
 562       *                          otherwise WP_Error.
 563       */
 564  	function wp_authenticate( $username, $password ) {
 565          $username = sanitize_user( $username );
 566          $password = trim( $password );
 567  
 568          /**
 569           * Filters whether a set of user login credentials are valid.
 570           *
 571           * A WP_User object is returned if the credentials authenticate a user.
 572           * WP_Error or null otherwise.
 573           *
 574           * @since 2.8.0
 575           * @since 4.5.0 `$username` now accepts an email address.
 576           *
 577           * @param null|WP_User|WP_Error $user     WP_User if the user is authenticated.
 578           *                                        WP_Error or null otherwise.
 579           * @param string                $username Username or email address.
 580           * @param string                $password User password
 581           */
 582          $user = apply_filters( 'authenticate', null, $username, $password );
 583  
 584          if ( null == $user ) {
 585              // TODO: What should the error message be? (Or would these even happen?)
 586              // Only needed if all authentication handlers fail to return anything.
 587              $user = new WP_Error( 'authentication_failed', __( '<strong>Error</strong>: Invalid username, email address or incorrect password.' ) );
 588          }
 589  
 590          $ignore_codes = array( 'empty_username', 'empty_password' );
 591  
 592          if ( is_wp_error( $user ) && ! in_array( $user->get_error_code(), $ignore_codes, true ) ) {
 593              $error = $user;
 594  
 595              /**
 596               * Fires after a user login has failed.
 597               *
 598               * @since 2.5.0
 599               * @since 4.5.0 The value of `$username` can now be an email address.
 600               * @since 5.4.0 The `$error` parameter was added.
 601               *
 602               * @param string   $username Username or email address.
 603               * @param WP_Error $error    A WP_Error object with the authentication failure details.
 604               */
 605              do_action( 'wp_login_failed', $username, $error );
 606          }
 607  
 608          return $user;
 609      }
 610  endif;
 611  
 612  if ( ! function_exists( 'wp_logout' ) ) :
 613      /**
 614       * Log the current user out.
 615       *
 616       * @since 2.5.0
 617       */
 618  	function wp_logout() {
 619          $user_id = get_current_user_id();
 620  
 621          wp_destroy_current_session();
 622          wp_clear_auth_cookie();
 623          wp_set_current_user( 0 );
 624  
 625          /**
 626           * Fires after a user is logged out.
 627           *
 628           * @since 1.5.0
 629           * @since 5.5.0 Added the `$user_id` parameter.
 630           *
 631           * @param int $user_id ID of the user that was logged out.
 632           */
 633          do_action( 'wp_logout', $user_id );
 634      }
 635  endif;
 636  
 637  if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
 638      /**
 639       * Validates authentication cookie.
 640       *
 641       * The checks include making sure that the authentication cookie is set and
 642       * pulling in the contents (if $cookie is not used).
 643       *
 644       * Makes sure the cookie is not expired. Verifies the hash in cookie is what is
 645       * should be and compares the two.
 646       *
 647       * @since 2.5.0
 648       *
 649       * @global int $login_grace_period
 650       *
 651       * @param string $cookie Optional. If used, will validate contents instead of cookie's.
 652       * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 653       * @return int|false User ID if valid cookie, false if invalid.
 654       */
 655  	function wp_validate_auth_cookie( $cookie = '', $scheme = '' ) {
 656          $cookie_elements = wp_parse_auth_cookie( $cookie, $scheme );
 657          if ( ! $cookie_elements ) {
 658              /**
 659               * Fires if an authentication cookie is malformed.
 660               *
 661               * @since 2.7.0
 662               *
 663               * @param string $cookie Malformed auth cookie.
 664               * @param string $scheme Authentication scheme. Values include 'auth', 'secure_auth',
 665               *                       or 'logged_in'.
 666               */
 667              do_action( 'auth_cookie_malformed', $cookie, $scheme );
 668              return false;
 669          }
 670  
 671          $scheme     = $cookie_elements['scheme'];
 672          $username   = $cookie_elements['username'];
 673          $hmac       = $cookie_elements['hmac'];
 674          $token      = $cookie_elements['token'];
 675          $expired    = $cookie_elements['expiration'];
 676          $expiration = $cookie_elements['expiration'];
 677  
 678          // Allow a grace period for POST and Ajax requests.
 679          if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
 680              $expired += HOUR_IN_SECONDS;
 681          }
 682  
 683          // Quick check to see if an honest cookie has expired.
 684          if ( $expired < time() ) {
 685              /**
 686               * Fires once an authentication cookie has expired.
 687               *
 688               * @since 2.7.0
 689               *
 690               * @param string[] $cookie_elements An array of data for the authentication cookie.
 691               */
 692              do_action( 'auth_cookie_expired', $cookie_elements );
 693              return false;
 694          }
 695  
 696          $user = get_user_by( 'login', $username );
 697          if ( ! $user ) {
 698              /**
 699               * Fires if a bad username is entered in the user authentication process.
 700               *
 701               * @since 2.7.0
 702               *
 703               * @param string[] $cookie_elements An array of data for the authentication cookie.
 704               */
 705              do_action( 'auth_cookie_bad_username', $cookie_elements );
 706              return false;
 707          }
 708  
 709          $pass_frag = substr( $user->user_pass, 8, 4 );
 710  
 711          $key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );
 712  
 713          // If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
 714          $algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
 715          $hash = hash_hmac( $algo, $username . '|' . $expiration . '|' . $token, $key );
 716  
 717          if ( ! hash_equals( $hash, $hmac ) ) {
 718              /**
 719               * Fires if a bad authentication cookie hash is encountered.
 720               *
 721               * @since 2.7.0
 722               *
 723               * @param string[] $cookie_elements An array of data for the authentication cookie.
 724               */
 725              do_action( 'auth_cookie_bad_hash', $cookie_elements );
 726              return false;
 727          }
 728  
 729          $manager = WP_Session_Tokens::get_instance( $user->ID );
 730          if ( ! $manager->verify( $token ) ) {
 731              /**
 732               * Fires if a bad session token is encountered.
 733               *
 734               * @since 4.0.0
 735               *
 736               * @param string[] $cookie_elements An array of data for the authentication cookie.
 737               */
 738              do_action( 'auth_cookie_bad_session_token', $cookie_elements );
 739              return false;
 740          }
 741  
 742          // Ajax/POST grace period set above.
 743          if ( $expiration < time() ) {
 744              $GLOBALS['login_grace_period'] = 1;
 745          }
 746  
 747          /**
 748           * Fires once an authentication cookie has been validated.
 749           *
 750           * @since 2.7.0
 751           *
 752           * @param string[] $cookie_elements An array of data for the authentication cookie.
 753           * @param WP_User  $user            User object.
 754           */
 755          do_action( 'auth_cookie_valid', $cookie_elements, $user );
 756  
 757          return $user->ID;
 758      }
 759  endif;
 760  
 761  if ( ! function_exists( 'wp_generate_auth_cookie' ) ) :
 762      /**
 763       * Generates authentication cookie contents.
 764       *
 765       * @since 2.5.0
 766       * @since 4.0.0 The `$token` parameter was added.
 767       *
 768       * @param int    $user_id    User ID.
 769       * @param int    $expiration The time the cookie expires as a UNIX timestamp.
 770       * @param string $scheme     Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 771       *                           Default 'auth'.
 772       * @param string $token      User's session token to use for this cookie.
 773       * @return string Authentication cookie contents. Empty string if user does not exist.
 774       */
 775  	function wp_generate_auth_cookie( $user_id, $expiration, $scheme = 'auth', $token = '' ) {
 776          $user = get_userdata( $user_id );
 777          if ( ! $user ) {
 778              return '';
 779          }
 780  
 781          if ( ! $token ) {
 782              $manager = WP_Session_Tokens::get_instance( $user_id );
 783              $token   = $manager->create( $expiration );
 784          }
 785  
 786          $pass_frag = substr( $user->user_pass, 8, 4 );
 787  
 788          $key = wp_hash( $user->user_login . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );
 789  
 790          // If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
 791          $algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
 792          $hash = hash_hmac( $algo, $user->user_login . '|' . $expiration . '|' . $token, $key );
 793  
 794          $cookie = $user->user_login . '|' . $expiration . '|' . $token . '|' . $hash;
 795  
 796          /**
 797           * Filters the authentication cookie.
 798           *
 799           * @since 2.5.0
 800           * @since 4.0.0 The `$token` parameter was added.
 801           *
 802           * @param string $cookie     Authentication cookie.
 803           * @param int    $user_id    User ID.
 804           * @param int    $expiration The time the cookie expires as a UNIX timestamp.
 805           * @param string $scheme     Cookie scheme used. Accepts 'auth', 'secure_auth', or 'logged_in'.
 806           * @param string $token      User's session token used.
 807           */
 808          return apply_filters( 'auth_cookie', $cookie, $user_id, $expiration, $scheme, $token );
 809      }
 810  endif;
 811  
 812  if ( ! function_exists( 'wp_parse_auth_cookie' ) ) :
 813      /**
 814       * Parses a cookie into its components.
 815       *
 816       * @since 2.7.0
 817       *
 818       * @param string $cookie Authentication cookie.
 819       * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
 820       * @return string[]|false Authentication cookie components.
 821       */
 822  	function wp_parse_auth_cookie( $cookie = '', $scheme = '' ) {
 823          if ( empty( $cookie ) ) {
 824              switch ( $scheme ) {
 825                  case 'auth':
 826                      $cookie_name = AUTH_COOKIE;
 827                      break;
 828                  case 'secure_auth':
 829                      $cookie_name = SECURE_AUTH_COOKIE;
 830                      break;
 831                  case 'logged_in':
 832                      $cookie_name = LOGGED_IN_COOKIE;
 833                      break;
 834                  default:
 835                      if ( is_ssl() ) {
 836                          $cookie_name = SECURE_AUTH_COOKIE;
 837                          $scheme      = 'secure_auth';
 838                      } else {
 839                          $cookie_name = AUTH_COOKIE;
 840                          $scheme      = 'auth';
 841                      }
 842              }
 843  
 844              if ( empty( $_COOKIE[ $cookie_name ] ) ) {
 845                  return false;
 846              }
 847              $cookie = $_COOKIE[ $cookie_name ];
 848          }
 849  
 850          $cookie_elements = explode( '|', $cookie );
 851          if ( count( $cookie_elements ) !== 4 ) {
 852              return false;
 853          }
 854  
 855          list( $username, $expiration, $token, $hmac ) = $cookie_elements;
 856  
 857          return compact( 'username', 'expiration', 'token', 'hmac', 'scheme' );
 858      }
 859  endif;
 860  
 861  if ( ! function_exists( 'wp_set_auth_cookie' ) ) :
 862      /**
 863       * Sets the authentication cookies based on user ID.
 864       *
 865       * The $remember parameter increases the time that the cookie will be kept. The
 866       * default the cookie is kept without remembering is two days. When $remember is
 867       * set, the cookies will be kept for 14 days or two weeks.
 868       *
 869       * @since 2.5.0
 870       * @since 4.3.0 Added the `$token` parameter.
 871       *
 872       * @param int         $user_id  User ID.
 873       * @param bool        $remember Whether to remember the user.
 874       * @param bool|string $secure   Whether the auth cookie should only be sent over HTTPS. Default is an empty
 875       *                              string which means the value of `is_ssl()` will be used.
 876       * @param string      $token    Optional. User's session token to use for this cookie.
 877       */
 878  	function wp_set_auth_cookie( $user_id, $remember = false, $secure = '', $token = '' ) {
 879          if ( $remember ) {
 880              /**
 881               * Filters the duration of the authentication cookie expiration period.
 882               *
 883               * @since 2.8.0
 884               *
 885               * @param int  $length   Duration of the expiration period in seconds.
 886               * @param int  $user_id  User ID.
 887               * @param bool $remember Whether to remember the user login. Default false.
 888               */
 889              $expiration = time() + apply_filters( 'auth_cookie_expiration', 14 * DAY_IN_SECONDS, $user_id, $remember );
 890  
 891              /*
 892               * Ensure the browser will continue to send the cookie after the expiration time is reached.
 893               * Needed for the login grace period in wp_validate_auth_cookie().
 894               */
 895              $expire = $expiration + ( 12 * HOUR_IN_SECONDS );
 896          } else {
 897              /** This filter is documented in wp-includes/pluggable.php */
 898              $expiration = time() + apply_filters( 'auth_cookie_expiration', 2 * DAY_IN_SECONDS, $user_id, $remember );
 899              $expire     = 0;
 900          }
 901  
 902          if ( '' === $secure ) {
 903              $secure = is_ssl();
 904          }
 905  
 906          // Front-end cookie is secure when the auth cookie is secure and the site's home URL uses HTTPS.
 907          $secure_logged_in_cookie = $secure && 'https' === parse_url( get_option( 'home' ), PHP_URL_SCHEME );
 908  
 909          /**
 910           * Filters whether the auth cookie should only be sent over HTTPS.
 911           *
 912           * @since 3.1.0
 913           *
 914           * @param bool $secure  Whether the cookie should only be sent over HTTPS.
 915           * @param int  $user_id User ID.
 916           */
 917          $secure = apply_filters( 'secure_auth_cookie', $secure, $user_id );
 918  
 919          /**
 920           * Filters whether the logged in cookie should only be sent over HTTPS.
 921           *
 922           * @since 3.1.0
 923           *
 924           * @param bool $secure_logged_in_cookie Whether the logged in cookie should only be sent over HTTPS.
 925           * @param int  $user_id                 User ID.
 926           * @param bool $secure                  Whether the auth cookie should only be sent over HTTPS.
 927           */
 928          $secure_logged_in_cookie = apply_filters( 'secure_logged_in_cookie', $secure_logged_in_cookie, $user_id, $secure );
 929  
 930          if ( $secure ) {
 931              $auth_cookie_name = SECURE_AUTH_COOKIE;
 932              $scheme           = 'secure_auth';
 933          } else {
 934              $auth_cookie_name = AUTH_COOKIE;
 935              $scheme           = 'auth';
 936          }
 937  
 938          if ( '' === $token ) {
 939              $manager = WP_Session_Tokens::get_instance( $user_id );
 940              $token   = $manager->create( $expiration );
 941          }
 942  
 943          $auth_cookie      = wp_generate_auth_cookie( $user_id, $expiration, $scheme, $token );
 944          $logged_in_cookie = wp_generate_auth_cookie( $user_id, $expiration, 'logged_in', $token );
 945  
 946          /**
 947           * Fires immediately before the authentication cookie is set.
 948           *
 949           * @since 2.5.0
 950           * @since 4.9.0 The `$token` parameter was added.
 951           *
 952           * @param string $auth_cookie Authentication cookie value.
 953           * @param int    $expire      The time the login grace period expires as a UNIX timestamp.
 954           *                            Default is 12 hours past the cookie's expiration time.
 955           * @param int    $expiration  The time when the authentication cookie expires as a UNIX timestamp.
 956           *                            Default is 14 days from now.
 957           * @param int    $user_id     User ID.
 958           * @param string $scheme      Authentication scheme. Values include 'auth' or 'secure_auth'.
 959           * @param string $token       User's session token to use for this cookie.
 960           */
 961          do_action( 'set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme, $token );
 962  
 963          /**
 964           * Fires immediately before the logged-in authentication cookie is set.
 965           *
 966           * @since 2.6.0
 967           * @since 4.9.0 The `$token` parameter was added.
 968           *
 969           * @param string $logged_in_cookie The logged-in cookie value.
 970           * @param int    $expire           The time the login grace period expires as a UNIX timestamp.
 971           *                                 Default is 12 hours past the cookie's expiration time.
 972           * @param int    $expiration       The time when the logged-in authentication cookie expires as a UNIX timestamp.
 973           *                                 Default is 14 days from now.
 974           * @param int    $user_id          User ID.
 975           * @param string $scheme           Authentication scheme. Default 'logged_in'.
 976           * @param string $token            User's session token to use for this cookie.
 977           */
 978          do_action( 'set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in', $token );
 979  
 980          /**
 981           * Allows preventing auth cookies from actually being sent to the client.
 982           *
 983           * @since 4.7.4
 984           *
 985           * @param bool $send Whether to send auth cookies to the client.
 986           */
 987          if ( ! apply_filters( 'send_auth_cookies', true ) ) {
 988              return;
 989          }
 990  
 991          setcookie( $auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
 992          setcookie( $auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
 993          setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
 994          if ( COOKIEPATH != SITECOOKIEPATH ) {
 995              setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
 996          }
 997      }
 998  endif;
 999  
1000  if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
1001      /**
1002       * Removes all of the cookies associated with authentication.
1003       *
1004       * @since 2.5.0
1005       */
1006  	function wp_clear_auth_cookie() {
1007          /**
1008           * Fires just before the authentication cookies are cleared.
1009           *
1010           * @since 2.7.0
1011           */
1012          do_action( 'clear_auth_cookie' );
1013  
1014          /** This filter is documented in wp-includes/pluggable.php */
1015          if ( ! apply_filters( 'send_auth_cookies', true ) ) {
1016              return;
1017          }
1018  
1019          // Auth cookies.
1020          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
1021          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
1022          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
1023          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
1024          setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1025          setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1026  
1027          // Settings cookies.
1028          setcookie( 'wp-settings-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
1029          setcookie( 'wp-settings-time-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
1030  
1031          // Old cookies.
1032          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1033          setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1034          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1035          setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1036  
1037          // Even older cookies.
1038          setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1039          setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1040          setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1041          setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
1042  
1043          // Post password cookie.
1044          setcookie( 'wp-postpass_' . COOKIEHASH, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
1045      }
1046  endif;
1047  
1048  if ( ! function_exists( 'is_user_logged_in' ) ) :
1049      /**
1050       * Determines whether the current visitor is a logged in user.
1051       *
1052       * For more information on this and similar theme functions, check out
1053       * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1054       * Conditional Tags} article in the Theme Developer Handbook.
1055       *
1056       * @since 2.0.0
1057       *
1058       * @return bool True if user is logged in, false if not logged in.
1059       */
1060  	function is_user_logged_in() {
1061          $user = wp_get_current_user();
1062  
1063          return $user->exists();
1064      }
1065  endif;
1066  
1067  if ( ! function_exists( 'auth_redirect' ) ) :
1068      /**
1069       * Checks if a user is logged in, if not it redirects them to the login page.
1070       *
1071       * When this code is called from a page, it checks to see if the user viewing the page is logged in.
1072       * If the user is not logged in, they are redirected to the login page. The user is redirected
1073       * in such a way that, upon logging in, they will be sent directly to the page they were originally
1074       * trying to access.
1075       *
1076       * @since 1.5.0
1077       */
1078  	function auth_redirect() {
1079          $secure = ( is_ssl() || force_ssl_admin() );
1080  
1081          /**
1082           * Filters whether to use a secure authentication redirect.
1083           *
1084           * @since 3.1.0
1085           *
1086           * @param bool $secure Whether to use a secure authentication redirect. Default false.
1087           */
1088          $secure = apply_filters( 'secure_auth_redirect', $secure );
1089  
1090          // If https is required and request is http, redirect.
1091          if ( $secure && ! is_ssl() && false !== strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
1092              if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
1093                  wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
1094                  exit;
1095              } else {
1096                  wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1097                  exit;
1098              }
1099          }
1100  
1101          /**
1102           * Filters the authentication redirect scheme.
1103           *
1104           * @since 2.9.0
1105           *
1106           * @param string $scheme Authentication redirect scheme. Default empty.
1107           */
1108          $scheme = apply_filters( 'auth_redirect_scheme', '' );
1109  
1110          $user_id = wp_validate_auth_cookie( '', $scheme );
1111          if ( $user_id ) {
1112              /**
1113               * Fires before the authentication redirect.
1114               *
1115               * @since 2.8.0
1116               *
1117               * @param int $user_id User ID.
1118               */
1119              do_action( 'auth_redirect', $user_id );
1120  
1121              // If the user wants ssl but the session is not ssl, redirect.
1122              if ( ! $secure && get_user_option( 'use_ssl', $user_id ) && false !== strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
1123                  if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
1124                      wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
1125                      exit;
1126                  } else {
1127                      wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1128                      exit;
1129                  }
1130              }
1131  
1132              return; // The cookie is good, so we're done.
1133          }
1134  
1135          // The cookie is no good, so force login.
1136          nocache_headers();
1137  
1138          $redirect = ( strpos( $_SERVER['REQUEST_URI'], '/options.php' ) && wp_get_referer() ) ? wp_get_referer() : set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1139  
1140          $login_url = wp_login_url( $redirect, true );
1141  
1142          wp_redirect( $login_url );
1143          exit;
1144      }
1145  endif;
1146  
1147  if ( ! function_exists( 'check_admin_referer' ) ) :
1148      /**
1149       * Ensures intent by verifying that a user was referred from another admin page with the correct security nonce.
1150       *
1151       * This function ensures the user intends to perform a given action, which helps protect against clickjacking style
1152       * attacks. It verifies intent, not authorisation, therefore it does not verify the user's capabilities. This should
1153       * be performed with `current_user_can()` or similar.
1154       *
1155       * If the nonce value is invalid, the function will exit with an "Are You Sure?" style message.
1156       *
1157       * @since 1.2.0
1158       * @since 2.5.0 The `$query_arg` parameter was added.
1159       *
1160       * @param int|string $action    The nonce action.
1161       * @param string     $query_arg Optional. Key to check for nonce in `$_REQUEST`. Default '_wpnonce'.
1162       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
1163       *                   2 if the nonce is valid and generated between 12-24 hours ago.
1164       *                   False if the nonce is invalid.
1165       */
1166  	function check_admin_referer( $action = -1, $query_arg = '_wpnonce' ) {
1167          if ( -1 === $action ) {
1168              _doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.2.0' );
1169          }
1170  
1171          $adminurl = strtolower( admin_url() );
1172          $referer  = strtolower( wp_get_referer() );
1173          $result   = isset( $_REQUEST[ $query_arg ] ) ? wp_verify_nonce( $_REQUEST[ $query_arg ], $action ) : false;
1174  
1175          /**
1176           * Fires once the admin request has been validated or not.
1177           *
1178           * @since 1.5.1
1179           *
1180           * @param string    $action The nonce action.
1181           * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
1182           *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
1183           */
1184          do_action( 'check_admin_referer', $action, $result );
1185  
1186          if ( ! $result && ! ( -1 === $action && strpos( $referer, $adminurl ) === 0 ) ) {
1187              wp_nonce_ays( $action );
1188              die();
1189          }
1190  
1191          return $result;
1192      }
1193  endif;
1194  
1195  if ( ! function_exists( 'check_ajax_referer' ) ) :
1196      /**
1197       * Verifies the Ajax request to prevent processing requests external of the blog.
1198       *
1199       * @since 2.0.3
1200       *
1201       * @param int|string   $action    Action nonce.
1202       * @param false|string $query_arg Optional. Key to check for the nonce in `$_REQUEST` (since 2.5). If false,
1203       *                                `$_REQUEST` values will be evaluated for '_ajax_nonce', and '_wpnonce'
1204       *                                (in that order). Default false.
1205       * @param bool         $die       Optional. Whether to die early when the nonce cannot be verified.
1206       *                                Default true.
1207       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
1208       *                   2 if the nonce is valid and generated between 12-24 hours ago.
1209       *                   False if the nonce is invalid.
1210       */
1211  	function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) {
1212          if ( -1 == $action ) {
1213              _doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '4.7' );
1214          }
1215  
1216          $nonce = '';
1217  
1218          if ( $query_arg && isset( $_REQUEST[ $query_arg ] ) ) {
1219              $nonce = $_REQUEST[ $query_arg ];
1220          } elseif ( isset( $_REQUEST['_ajax_nonce'] ) ) {
1221              $nonce = $_REQUEST['_ajax_nonce'];
1222          } elseif ( isset( $_REQUEST['_wpnonce'] ) ) {
1223              $nonce = $_REQUEST['_wpnonce'];
1224          }
1225  
1226          $result = wp_verify_nonce( $nonce, $action );
1227  
1228          /**
1229           * Fires once the Ajax request has been validated or not.
1230           *
1231           * @since 2.1.0
1232           *
1233           * @param string    $action The Ajax nonce action.
1234           * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
1235           *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
1236           */
1237          do_action( 'check_ajax_referer', $action, $result );
1238  
1239          if ( $die && false === $result ) {
1240              if ( wp_doing_ajax() ) {
1241                  wp_die( -1, 403 );
1242              } else {
1243                  die( '-1' );
1244              }
1245          }
1246  
1247          return $result;
1248      }
1249  endif;
1250  
1251  if ( ! function_exists( 'wp_redirect' ) ) :
1252      /**
1253       * Redirects to another page.
1254       *
1255       * Note: wp_redirect() does not exit automatically, and should almost always be
1256       * followed by a call to `exit;`:
1257       *
1258       *     wp_redirect( $url );
1259       *     exit;
1260       *
1261       * Exiting can also be selectively manipulated by using wp_redirect() as a conditional
1262       * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_location'} filters:
1263       *
1264       *     if ( wp_redirect( $url ) ) {
1265       *         exit;
1266       *     }
1267       *
1268       * @since 1.5.1
1269       * @since 5.1.0 The `$x_redirect_by` parameter was added.
1270       * @since 5.4.0 On invalid status codes, wp_die() is called.
1271       *
1272       * @global bool $is_IIS
1273       *
1274       * @param string $location      The path or URL to redirect to.
1275       * @param int    $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
1276       * @param string $x_redirect_by Optional. The application doing the redirect. Default 'WordPress'.
1277       * @return bool False if the redirect was cancelled, true otherwise.
1278       */
1279  	function wp_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
1280          global $is_IIS;
1281  
1282          /**
1283           * Filters the redirect location.
1284           *
1285           * @since 2.1.0
1286           *
1287           * @param string $location The path or URL to redirect to.
1288           * @param int    $status   The HTTP response status code to use.
1289           */
1290          $location = apply_filters( 'wp_redirect', $location, $status );
1291  
1292          /**
1293           * Filters the redirect HTTP response status code to use.
1294           *
1295           * @since 2.3.0
1296           *
1297           * @param int    $status   The HTTP response status code to use.
1298           * @param string $location The path or URL to redirect to.
1299           */
1300          $status = apply_filters( 'wp_redirect_status', $status, $location );
1301  
1302          if ( ! $location ) {
1303              return false;
1304          }
1305  
1306          if ( $status < 300 || 399 < $status ) {
1307              wp_die( __( 'HTTP redirect status code must be a redirection code, 3xx.' ) );
1308          }
1309  
1310          $location = wp_sanitize_redirect( $location );
1311  
1312          if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
1313              status_header( $status ); // This causes problems on IIS and some FastCGI setups.
1314          }
1315  
1316          /**
1317           * Filters the X-Redirect-By header.
1318           *
1319           * Allows applications to identify themselves when they're doing a redirect.
1320           *
1321           * @since 5.1.0
1322           *
1323           * @param string $x_redirect_by The application doing the redirect.
1324           * @param int    $status        Status code to use.
1325           * @param string $location      The path to redirect to.
1326           */
1327          $x_redirect_by = apply_filters( 'x_redirect_by', $x_redirect_by, $status, $location );
1328          if ( is_string( $x_redirect_by ) ) {
1329              header( "X-Redirect-By: $x_redirect_by" );
1330          }
1331  
1332          header( "Location: $location", true, $status );
1333  
1334          return true;
1335      }
1336  endif;
1337  
1338  if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
1339      /**
1340       * Sanitizes a URL for use in a redirect.
1341       *
1342       * @since 2.3.0
1343       *
1344       * @param string $location The path to redirect to.
1345       * @return string Redirect-sanitized URL.
1346       */
1347  	function wp_sanitize_redirect( $location ) {
1348          // Encode spaces.
1349          $location = str_replace( ' ', '%20', $location );
1350  
1351          $regex    = '/
1352          (
1353              (?: [\xC2-\xDF][\x80-\xBF]        # double-byte sequences   110xxxxx 10xxxxxx
1354              |   \xE0[\xA0-\xBF][\x80-\xBF]    # triple-byte sequences   1110xxxx 10xxxxxx * 2
1355              |   [\xE1-\xEC][\x80-\xBF]{2}
1356              |   \xED[\x80-\x9F][\x80-\xBF]
1357              |   [\xEE-\xEF][\x80-\xBF]{2}
1358              |   \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
1359              |   [\xF1-\xF3][\x80-\xBF]{3}
1360              |   \xF4[\x80-\x8F][\x80-\xBF]{2}
1361          ){1,40}                              # ...one or more times
1362          )/x';
1363          $location = preg_replace_callback( $regex, '_wp_sanitize_utf8_in_redirect', $location );
1364          $location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location );
1365          $location = wp_kses_no_null( $location );
1366  
1367          // Remove %0D and %0A from location.
1368          $strip = array( '%0d', '%0a', '%0D', '%0A' );
1369          return _deep_replace( $strip, $location );
1370      }
1371  
1372      /**
1373       * URL encode UTF-8 characters in a URL.
1374       *
1375       * @ignore
1376       * @since 4.2.0
1377       * @access private
1378       *
1379       * @see wp_sanitize_redirect()
1380       *
1381       * @param array $matches RegEx matches against the redirect location.
1382       * @return string URL-encoded version of the first RegEx match.
1383       */
1384  	function _wp_sanitize_utf8_in_redirect( $matches ) {
1385          return urlencode( $matches[0] );
1386      }
1387  endif;
1388  
1389  if ( ! function_exists( 'wp_safe_redirect' ) ) :
1390      /**
1391       * Performs a safe (local) redirect, using wp_redirect().
1392       *
1393       * Checks whether the $location is using an allowed host, if it has an absolute
1394       * path. A plugin can therefore set or remove allowed host(s) to or from the
1395       * list.
1396       *
1397       * If the host is not allowed, then the redirect defaults to wp-admin on the siteurl
1398       * instead. This prevents malicious redirects which redirect to another host,
1399       * but only used in a few places.
1400       *
1401       * Note: wp_safe_redirect() does not exit automatically, and should almost always be
1402       * followed by a call to `exit;`:
1403       *
1404       *     wp_safe_redirect( $url );
1405       *     exit;
1406       *
1407       * Exiting can also be selectively manipulated by using wp_safe_redirect() as a conditional
1408       * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_location'} filters:
1409       *
1410       *     if ( wp_safe_redirect( $url ) ) {
1411       *         exit;
1412       *     }
1413       *
1414       * @since 2.3.0
1415       * @since 5.1.0 The return value from wp_redirect() is now passed on, and the `$x_redirect_by` parameter was added.
1416       *
1417       * @param string $location      The path or URL to redirect to.
1418       * @param int    $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
1419       * @param string $x_redirect_by Optional. The application doing the redirect. Default 'WordPress'.
1420       * @return bool False if the redirect was cancelled, true otherwise.
1421       */
1422  	function wp_safe_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
1423  
1424          // Need to look at the URL the way it will end up in wp_redirect().
1425          $location = wp_sanitize_redirect( $location );
1426  
1427          /**
1428           * Filters the redirect fallback URL for when the provided redirect is not safe (local).
1429           *
1430           * @since 4.3.0
1431           *
1432           * @param string $fallback_url The fallback URL to use by default.
1433           * @param int    $status       The HTTP response status code to use.
1434           */
1435          $location = wp_validate_redirect( $location, apply_filters( 'wp_safe_redirect_fallback', admin_url(), $status ) );
1436  
1437          return wp_redirect( $location, $status, $x_redirect_by );
1438      }
1439  endif;
1440  
1441  if ( ! function_exists( 'wp_validate_redirect' ) ) :
1442      /**
1443       * Validates a URL for use in a redirect.
1444       *
1445       * Checks whether the $location is using an allowed host, if it has an absolute
1446       * path. A plugin can therefore set or remove allowed host(s) to or from the
1447       * list.
1448       *
1449       * If the host is not allowed, then the redirect is to $default supplied
1450       *
1451       * @since 2.8.1
1452       *
1453       * @param string $location The redirect to validate
1454       * @param string $default  The value to return if $location is not allowed
1455       * @return string redirect-sanitized URL
1456       */
1457  	function wp_validate_redirect( $location, $default = '' ) {
1458          $location = wp_sanitize_redirect( trim( $location, " \t\n\r\0\x08\x0B" ) );
1459          // Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
1460          if ( '//' === substr( $location, 0, 2 ) ) {
1461              $location = 'http:' . $location;
1462          }
1463  
1464          // In PHP 5 parse_url() may fail if the URL query part contains 'http://'.
1465          // See https://bugs.php.net/bug.php?id=38143
1466          $cut  = strpos( $location, '?' );
1467          $test = $cut ? substr( $location, 0, $cut ) : $location;
1468  
1469          $lp = parse_url( $test );
1470  
1471          // Give up if malformed URL.
1472          if ( false === $lp ) {
1473              return $default;
1474          }
1475  
1476          // Allow only 'http' and 'https' schemes. No 'data:', etc.
1477          if ( isset( $lp['scheme'] ) && ! ( 'http' === $lp['scheme'] || 'https' === $lp['scheme'] ) ) {
1478              return $default;
1479          }
1480  
1481          if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
1482              $path = '';
1483              if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
1484                  $path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
1485                  $path = wp_normalize_path( $path );
1486              }
1487              $location = '/' . ltrim( $path . '/', '/' ) . $location;
1488          }
1489  
1490          // Reject if certain components are set but host is not.
1491          // This catches URLs like https:host.com for which parse_url() does not set the host field.
1492          if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
1493              return $default;
1494          }
1495  
1496          // Reject malformed components parse_url() can return on odd inputs.
1497          foreach ( array( 'user', 'pass', 'host' ) as $component ) {
1498              if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
1499                  return $default;
1500              }
1501          }
1502  
1503          $wpp = parse_url( home_url() );
1504  
1505          /**
1506           * Filters the list of allowed hosts to redirect to.
1507           *
1508           * @since 2.3.0
1509           *
1510           * @param string[] $hosts An array of allowed host names.
1511           * @param string   $host  The host name of the redirect destination; empty string if not set.
1512           */
1513          $allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );
1514  
1515          if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) {
1516              $location = $default;
1517          }
1518  
1519          return $location;
1520      }
1521  endif;
1522  
1523  if ( ! function_exists( 'wp_notify_postauthor' ) ) :
1524      /**
1525       * Notify an author (and/or others) of a comment/trackback/pingback on a post.
1526       *
1527       * @since 1.0.0
1528       *
1529       * @param int|WP_Comment $comment_id Comment ID or WP_Comment object.
1530       * @param string         $deprecated Not used
1531       * @return bool True on completion. False if no email addresses were specified.
1532       */
1533  	function wp_notify_postauthor( $comment_id, $deprecated = null ) {
1534          if ( null !== $deprecated ) {
1535              _deprecated_argument( __FUNCTION__, '3.8.0' );
1536          }
1537  
1538          $comment = get_comment( $comment_id );
1539          if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {
1540              return false;
1541          }
1542  
1543          $post   = get_post( $comment->comment_post_ID );
1544          $author = get_userdata( $post->post_author );
1545  
1546          // Who to notify? By default, just the post author, but others can be added.
1547          $emails = array();
1548          if ( $author ) {
1549              $emails[] = $author->user_email;
1550          }
1551  
1552          /**
1553           * Filters the list of email addresses to receive a comment notification.
1554           *
1555           * By default, only post authors are notified of comments. This filter allows
1556           * others to be added.
1557           *
1558           * @since 3.7.0
1559           *
1560           * @param string[] $emails     An array of email addresses to receive a comment notification.
1561           * @param int      $comment_id The comment ID.
1562           */
1563          $emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );
1564          $emails = array_filter( $emails );
1565  
1566          // If there are no addresses to send the comment to, bail.
1567          if ( ! count( $emails ) ) {
1568              return false;
1569          }
1570  
1571          // Facilitate unsetting below without knowing the keys.
1572          $emails = array_flip( $emails );
1573  
1574          /**
1575           * Filters whether to notify comment authors of their comments on their own posts.
1576           *
1577           * By default, comment authors aren't notified of their comments on their own
1578           * posts. This filter allows you to override that.
1579           *
1580           * @since 3.8.0
1581           *
1582           * @param bool $notify     Whether to notify the post author of their own comment.
1583           *                         Default false.
1584           * @param int  $comment_id The comment ID.
1585           */
1586          $notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );
1587  
1588          // The comment was left by the author.
1589          if ( $author && ! $notify_author && $comment->user_id == $post->post_author ) {
1590              unset( $emails[ $author->user_email ] );
1591          }
1592  
1593          // The author moderated a comment on their own post.
1594          if ( $author && ! $notify_author && get_current_user_id() == $post->post_author ) {
1595              unset( $emails[ $author->user_email ] );
1596          }
1597  
1598          // The post author is no longer a member of the blog.
1599          if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {
1600              unset( $emails[ $author->user_email ] );
1601          }
1602  
1603          // If there's no email to send the comment to, bail, otherwise flip array back around for use below.
1604          if ( ! count( $emails ) ) {
1605              return false;
1606          } else {
1607              $emails = array_flip( $emails );
1608          }
1609  
1610          $switched_locale = switch_to_locale( get_locale() );
1611  
1612          $comment_author_domain = '';
1613          if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
1614              $comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
1615          }
1616  
1617          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1618          // We want to reverse this for the plain text arena of emails.
1619          $blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1620          $comment_content = wp_specialchars_decode( $comment->comment_content );
1621  
1622          switch ( $comment->comment_type ) {
1623              case 'trackback':
1624                  /* translators: %s: Post title. */
1625                  $notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
1626                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1627                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1628                  /* translators: %s: Trackback/pingback/comment author URL. */
1629                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1630                  /* translators: %s: Comment text. */
1631                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1632                  $notify_message .= __( 'You can see all trackbacks on this post here:' ) . "\r\n";
1633                  /* translators: Trackback notification email subject. 1: Site title, 2: Post title. */
1634                  $subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );
1635                  break;
1636  
1637              case 'pingback':
1638                  /* translators: %s: Post title. */
1639                  $notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
1640                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1641                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1642                  /* translators: %s: Trackback/pingback/comment author URL. */
1643                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1644                  /* translators: %s: Comment text. */
1645                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1646                  $notify_message .= __( 'You can see all pingbacks on this post here:' ) . "\r\n";
1647                  /* translators: Pingback notification email subject. 1: Site title, 2: Post title. */
1648                  $subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );
1649                  break;
1650  
1651              default: // Comments.
1652                  /* translators: %s: Post title. */
1653                  $notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
1654                  /* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
1655                  $notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1656                  /* translators: %s: Comment author email. */
1657                  $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
1658                  /* translators: %s: Trackback/pingback/comment author URL. */
1659                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1660  
1661                  if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {
1662                      /* translators: Comment moderation. %s: Parent comment edit URL. */
1663                      $notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
1664                  }
1665  
1666                  /* translators: %s: Comment text. */
1667                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1668                  $notify_message .= __( 'You can see all comments on this post here:' ) . "\r\n";
1669                  /* translators: Comment notification email subject. 1: Site title, 2: Post title. */
1670                  $subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );
1671                  break;
1672          }
1673  
1674          $notify_message .= get_permalink( $comment->comment_post_ID ) . "#comments\r\n\r\n";
1675          /* translators: %s: Comment URL. */
1676          $notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "\r\n";
1677  
1678          if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {
1679              if ( EMPTY_TRASH_DAYS ) {
1680                  /* translators: Comment moderation. %s: Comment action URL. */
1681                  $notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1682              } else {
1683                  /* translators: Comment moderation. %s: Comment action URL. */
1684                  $notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1685              }
1686              /* translators: Comment moderation. %s: Comment action URL. */
1687              $notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
1688          }
1689  
1690          $wp_email = 'wordpress@' . preg_replace( '#^www\.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );
1691  
1692          if ( '' === $comment->comment_author ) {
1693              $from = "From: \"$blogname\" <$wp_email>";
1694              if ( '' !== $comment->comment_author_email ) {
1695                  $reply_to = "Reply-To: $comment->comment_author_email";
1696              }
1697          } else {
1698              $from = "From: \"$comment->comment_author\" <$wp_email>";
1699              if ( '' !== $comment->comment_author_email ) {
1700                  $reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
1701              }
1702          }
1703  
1704          $message_headers = "$from\n"
1705          . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
1706  
1707          if ( isset( $reply_to ) ) {
1708              $message_headers .= $reply_to . "\n";
1709          }
1710  
1711          /**
1712           * Filters the comment notification email text.
1713           *
1714           * @since 1.5.2
1715           *
1716           * @param string $notify_message The comment notification email text.
1717           * @param int    $comment_id     Comment ID.
1718           */
1719          $notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );
1720  
1721          /**
1722           * Filters the comment notification email subject.
1723           *
1724           * @since 1.5.2
1725           *
1726           * @param string $subject    The comment notification email subject.
1727           * @param int    $comment_id Comment ID.
1728           */
1729          $subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );
1730  
1731          /**
1732           * Filters the comment notification email headers.
1733           *
1734           * @since 1.5.2
1735           *
1736           * @param string $message_headers Headers for the comment notification email.
1737           * @param int    $comment_id      Comment ID.
1738           */
1739          $message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );
1740  
1741          foreach ( $emails as $email ) {
1742              wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
1743          }
1744  
1745          if ( $switched_locale ) {
1746              restore_previous_locale();
1747          }
1748  
1749          return true;
1750      }
1751  endif;
1752  
1753  if ( ! function_exists( 'wp_notify_moderator' ) ) :
1754      /**
1755       * Notifies the moderator of the site about a new comment that is awaiting approval.
1756       *
1757       * @since 1.0.0
1758       *
1759       * @global wpdb $wpdb WordPress database abstraction object.
1760       *
1761       * Uses the {@see 'notify_moderator'} filter to determine whether the site moderator
1762       * should be notified, overriding the site setting.
1763       *
1764       * @param int $comment_id Comment ID.
1765       * @return true Always returns true.
1766       */
1767  	function wp_notify_moderator( $comment_id ) {
1768          global $wpdb;
1769  
1770          $maybe_notify = get_option( 'moderation_notify' );
1771  
1772          /**
1773           * Filters whether to send the site moderator email notifications, overriding the site setting.
1774           *
1775           * @since 4.4.0
1776           *
1777           * @param bool $maybe_notify Whether to notify blog moderator.
1778           * @param int  $comment_ID   The id of the comment for the notification.
1779           */
1780          $maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );
1781  
1782          if ( ! $maybe_notify ) {
1783              return true;
1784          }
1785  
1786          $comment = get_comment( $comment_id );
1787          $post    = get_post( $comment->comment_post_ID );
1788          $user    = get_userdata( $post->post_author );
1789          // Send to the administration and to the post author if the author can modify the comment.
1790          $emails = array( get_option( 'admin_email' ) );
1791          if ( $user && user_can( $user->ID, 'edit_comment', $comment_id ) && ! empty( $user->user_email ) ) {
1792              if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
1793                  $emails[] = $user->user_email;
1794              }
1795          }
1796  
1797          $switched_locale = switch_to_locale( get_locale() );
1798  
1799          $comment_author_domain = '';
1800          if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
1801              $comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
1802          }
1803  
1804          $comments_waiting = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '0'" );
1805  
1806          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1807          // We want to reverse this for the plain text arena of emails.
1808          $blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1809          $comment_content = wp_specialchars_decode( $comment->comment_content );
1810  
1811          switch ( $comment->comment_type ) {
1812              case 'trackback':
1813                  /* translators: %s: Post title. */
1814                  $notify_message  = sprintf( __( 'A new trackback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1815                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1816                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1817                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1818                  /* translators: %s: Trackback/pingback/comment author URL. */
1819                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1820                  $notify_message .= __( 'Trackback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
1821                  break;
1822  
1823              case 'pingback':
1824                  /* translators: %s: Post title. */
1825                  $notify_message  = sprintf( __( 'A new pingback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1826                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1827                  /* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
1828                  $notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1829                  /* translators: %s: Trackback/pingback/comment author URL. */
1830                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1831                  $notify_message .= __( 'Pingback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
1832                  break;
1833  
1834              default: // Comments.
1835                  /* translators: %s: Post title. */
1836                  $notify_message  = sprintf( __( 'A new comment on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
1837                  $notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
1838                  /* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
1839                  $notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
1840                  /* translators: %s: Comment author email. */
1841                  $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
1842                  /* translators: %s: Trackback/pingback/comment author URL. */
1843                  $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
1844  
1845                  if ( $comment->comment_parent ) {
1846                      /* translators: Comment moderation. %s: Parent comment edit URL. */
1847                      $notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
1848                  }
1849  
1850                  /* translators: %s: Comment text. */
1851                  $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
1852                  break;
1853          }
1854  
1855          /* translators: Comment moderation. %s: Comment action URL. */
1856          $notify_message .= sprintf( __( 'Approve it: %s' ), admin_url( "comment.php?action=approve&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1857  
1858          if ( EMPTY_TRASH_DAYS ) {
1859              /* translators: Comment moderation. %s: Comment action URL. */
1860              $notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1861          } else {
1862              /* translators: Comment moderation. %s: Comment action URL. */
1863              $notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1864          }
1865  
1866          /* translators: Comment moderation. %s: Comment action URL. */
1867          $notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment_id}#wpbody-content" ) ) . "\r\n";
1868  
1869          $notify_message .= sprintf(
1870              /* translators: Comment moderation. %s: Number of comments awaiting approval. */
1871              _n(
1872                  'Currently %s comment is waiting for approval. Please visit the moderation panel:',
1873                  'Currently %s comments are waiting for approval. Please visit the moderation panel:',
1874                  $comments_waiting
1875              ),
1876              number_format_i18n( $comments_waiting )
1877          ) . "\r\n";
1878          $notify_message .= admin_url( 'edit-comments.php?comment_status=moderated#wpbody-content' ) . "\r\n";
1879  
1880          /* translators: Comment moderation notification email subject. 1: Site title, 2: Post title. */
1881          $subject         = sprintf( __( '[%1$s] Please moderate: "%2$s"' ), $blogname, $post->post_title );
1882          $message_headers = '';
1883  
1884          /**
1885           * Filters the list of recipients for comment moderation emails.
1886           *
1887           * @since 3.7.0
1888           *
1889           * @param string[] $emails     List of email addresses to notify for comment moderation.
1890           * @param int      $comment_id Comment ID.
1891           */
1892          $emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );
1893  
1894          /**
1895           * Filters the comment moderation email text.
1896           *
1897           * @since 1.5.2
1898           *
1899           * @param string $notify_message Text of the comment moderation email.
1900           * @param int    $comment_id     Comment ID.
1901           */
1902          $notify_message = apply_filters( 'comment_moderation_text', $notify_message, $comment_id );
1903  
1904          /**
1905           * Filters the comment moderation email subject.
1906           *
1907           * @since 1.5.2
1908           *
1909           * @param string $subject    Subject of the comment moderation email.
1910           * @param int    $comment_id Comment ID.
1911           */
1912          $subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id );
1913  
1914          /**
1915           * Filters the comment moderation email headers.
1916           *
1917           * @since 2.8.0
1918           *
1919           * @param string $message_headers Headers for the comment moderation email.
1920           * @param int    $comment_id      Comment ID.
1921           */
1922          $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id );
1923  
1924          foreach ( $emails as $email ) {
1925              wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
1926          }
1927  
1928          if ( $switched_locale ) {
1929              restore_previous_locale();
1930          }
1931  
1932          return true;
1933      }
1934  endif;
1935  
1936  if ( ! function_exists( 'wp_password_change_notification' ) ) :
1937      /**
1938       * Notify the blog admin of a user changing password, normally via email.
1939       *
1940       * @since 2.7.0
1941       *
1942       * @param WP_User $user User object.
1943       */
1944  	function wp_password_change_notification( $user ) {
1945          // Send a copy of password change notification to the admin,
1946          // but check to see if it's the admin whose password we're changing, and skip this.
1947          if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
1948              /* translators: %s: User name. */
1949              $message = sprintf( __( 'Password changed for user: %s' ), $user->user_login ) . "\r\n";
1950              // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
1951              // We want to reverse this for the plain text arena of emails.
1952              $blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
1953  
1954              $wp_password_change_notification_email = array(
1955                  'to'      => get_option( 'admin_email' ),
1956                  /* translators: Password change notification email subject. %s: Site title. */
1957                  'subject' => __( '[%s] Password Changed' ),
1958                  'message' => $message,
1959                  'headers' => '',
1960              );
1961  
1962              /**
1963               * Filters the contents of the password change notification email sent to the site admin.
1964               *
1965               * @since 4.9.0
1966               *
1967               * @param array   $wp_password_change_notification_email {
1968               *     Used to build wp_mail().
1969               *
1970               *     @type string $to      The intended recipient - site admin email address.
1971               *     @type string $subject The subject of the email.
1972               *     @type string $message The body of the email.
1973               *     @type string $headers The headers of the email.
1974               * }
1975               * @param WP_User $user     User object for user whose password was changed.
1976               * @param string  $blogname The site title.
1977               */
1978              $wp_password_change_notification_email = apply_filters( 'wp_password_change_notification_email', $wp_password_change_notification_email, $user, $blogname );
1979  
1980              wp_mail(
1981                  $wp_password_change_notification_email['to'],
1982                  wp_specialchars_decode( sprintf( $wp_password_change_notification_email['subject'], $blogname ) ),
1983                  $wp_password_change_notification_email['message'],
1984                  $wp_password_change_notification_email['headers']
1985              );
1986          }
1987      }
1988  endif;
1989  
1990  if ( ! function_exists( 'wp_new_user_notification' ) ) :
1991      /**
1992       * Email login credentials to a newly-registered user.
1993       *
1994       * A new user registration notification is also sent to admin email.
1995       *
1996       * @since 2.0.0
1997       * @since 4.3.0 The `$plaintext_pass` parameter was changed to `$notify`.
1998       * @since 4.3.1 The `$plaintext_pass` parameter was deprecated. `$notify` added as a third parameter.
1999       * @since 4.6.0 The `$notify` parameter accepts 'user' for sending notification only to the user created.
2000       *
2001       * @param int    $user_id    User ID.
2002       * @param null   $deprecated Not used (argument deprecated).
2003       * @param string $notify     Optional. Type of notification that should happen. Accepts 'admin' or an empty
2004       *                           string (admin only), 'user', or 'both' (admin and user). Default empty.
2005       */
2006  	function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) {
2007          if ( null !== $deprecated ) {
2008              _deprecated_argument( __FUNCTION__, '4.3.1' );
2009          }
2010  
2011          // Accepts only 'user', 'admin' , 'both' or default '' as $notify.
2012          if ( ! in_array( $notify, array( 'user', 'admin', 'both', '' ), true ) ) {
2013              return;
2014          }
2015  
2016          $user = get_userdata( $user_id );
2017  
2018          // The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
2019          // We want to reverse this for the plain text arena of emails.
2020          $blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
2021  
2022          if ( 'user' !== $notify ) {
2023              $switched_locale = switch_to_locale( get_locale() );
2024  
2025              /* translators: %s: Site title. */
2026              $message = sprintf( __( 'New user registration on your site %s:' ), $blogname ) . "\r\n\r\n";
2027              /* translators: %s: User login. */
2028              $message .= sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
2029              /* translators: %s: User email address. */
2030              $message .= sprintf( __( 'Email: %s' ), $user->user_email ) . "\r\n";
2031  
2032              $wp_new_user_notification_email_admin = array(
2033                  'to'      => get_option( 'admin_email' ),
2034                  /* translators: New user registration notification email subject. %s: Site title. */
2035                  'subject' => __( '[%s] New User Registration' ),
2036                  'message' => $message,
2037                  'headers' => '',
2038              );
2039  
2040              /**
2041               * Filters the contents of the new user notification email sent to the site admin.
2042               *
2043               * @since 4.9.0
2044               *
2045               * @param array   $wp_new_user_notification_email_admin {
2046               *     Used to build wp_mail().
2047               *
2048               *     @type string $to      The intended recipient - site admin email address.
2049               *     @type string $subject The subject of the email.
2050               *     @type string $message The body of the email.
2051               *     @type string $headers The headers of the email.
2052               * }
2053               * @param WP_User $user     User object for new user.
2054               * @param string  $blogname The site title.
2055               */
2056              $wp_new_user_notification_email_admin = apply_filters( 'wp_new_user_notification_email_admin', $wp_new_user_notification_email_admin, $user, $blogname );
2057  
2058              wp_mail(
2059                  $wp_new_user_notification_email_admin['to'],
2060                  wp_specialchars_decode( sprintf( $wp_new_user_notification_email_admin['subject'], $blogname ) ),
2061                  $wp_new_user_notification_email_admin['message'],
2062                  $wp_new_user_notification_email_admin['headers']
2063              );
2064  
2065              if ( $switched_locale ) {
2066                  restore_previous_locale();
2067              }
2068          }
2069  
2070          // `$deprecated` was pre-4.3 `$plaintext_pass`. An empty `$plaintext_pass` didn't sent a user notification.
2071          if ( 'admin' === $notify || ( empty( $deprecated ) && empty( $notify ) ) ) {
2072              return;
2073          }
2074  
2075          $key = get_password_reset_key( $user );
2076          if ( is_wp_error( $key ) ) {
2077              return;
2078          }
2079  
2080          $switched_locale = switch_to_locale( get_user_locale( $user ) );
2081  
2082          /* translators: %s: User login. */
2083          $message  = sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
2084          $message .= __( 'To set your password, visit the following address:' ) . "\r\n\r\n";
2085          $message .= network_site_url( "wp-login.php?action=rp&key=$key&login=" . rawurlencode( $user->user_login ), 'login' ) . "\r\n\r\n";
2086  
2087          $message .= wp_login_url() . "\r\n";
2088  
2089          $wp_new_user_notification_email = array(
2090              'to'      => $user->user_email,
2091              /* translators: Login details notification email subject. %s: Site title. */
2092              'subject' => __( '[%s] Login Details' ),
2093              'message' => $message,
2094              'headers' => '',
2095          );
2096  
2097          /**
2098           * Filters the contents of the new user notification email sent to the new user.
2099           *
2100           * @since 4.9.0
2101           *
2102           * @param array   $wp_new_user_notification_email {
2103           *     Used to build wp_mail().
2104           *
2105           *     @type string $to      The intended recipient - New user email address.
2106           *     @type string $subject The subject of the email.
2107           *     @type string $message The body of the email.
2108           *     @type string $headers The headers of the email.
2109           * }
2110           * @param WP_User $user     User object for new user.
2111           * @param string  $blogname The site title.
2112           */
2113          $wp_new_user_notification_email = apply_filters( 'wp_new_user_notification_email', $wp_new_user_notification_email, $user, $blogname );
2114  
2115          wp_mail(
2116              $wp_new_user_notification_email['to'],
2117              wp_specialchars_decode( sprintf( $wp_new_user_notification_email['subject'], $blogname ) ),
2118              $wp_new_user_notification_email['message'],
2119              $wp_new_user_notification_email['headers']
2120          );
2121  
2122          if ( $switched_locale ) {
2123              restore_previous_locale();
2124          }
2125      }
2126  endif;
2127  
2128  if ( ! function_exists( 'wp_nonce_tick' ) ) :
2129      /**
2130       * Returns the time-dependent variable for nonce creation.
2131       *
2132       * A nonce has a lifespan of two ticks. Nonces in their second tick may be
2133       * updated, e.g. by autosave.
2134       *
2135       * @since 2.5.0
2136       *
2137       * @return float Float value rounded up to the next highest integer.
2138       */
2139  	function wp_nonce_tick() {
2140          /**
2141           * Filters the lifespan of nonces in seconds.
2142           *
2143           * @since 2.5.0
2144           *
2145           * @param int $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
2146           */
2147          $nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS );
2148  
2149          return ceil( time() / ( $nonce_life / 2 ) );
2150      }
2151  endif;
2152  
2153  if ( ! function_exists( 'wp_verify_nonce' ) ) :
2154      /**
2155       * Verifies that a correct security nonce was used with time limit.
2156       *
2157       * A nonce is valid for 24 hours (by default).
2158       *
2159       * @since 2.0.3
2160       *
2161       * @param string     $nonce  Nonce value that was used for verification, usually via a form field.
2162       * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
2163       * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
2164       *                   2 if the nonce is valid and generated between 12-24 hours ago.
2165       *                   False if the nonce is invalid.
2166       */
2167  	function wp_verify_nonce( $nonce, $action = -1 ) {
2168          $nonce = (string) $nonce;
2169          $user  = wp_get_current_user();
2170          $uid   = (int) $user->ID;
2171          if ( ! $uid ) {
2172              /**
2173               * Filters whether the user who generated the nonce is logged out.
2174               *
2175               * @since 3.5.0
2176               *
2177               * @param int    $uid    ID of the nonce-owning user.
2178               * @param string $action The nonce action.
2179               */
2180              $uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
2181          }
2182  
2183          if ( empty( $nonce ) ) {
2184              return false;
2185          }
2186  
2187          $token = wp_get_session_token();
2188          $i     = wp_nonce_tick();
2189  
2190          // Nonce generated 0-12 hours ago.
2191          $expected = substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2192          if ( hash_equals( $expected, $nonce ) ) {
2193              return 1;
2194          }
2195  
2196          // Nonce generated 12-24 hours ago.
2197          $expected = substr( wp_hash( ( $i - 1 ) . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2198          if ( hash_equals( $expected, $nonce ) ) {
2199              return 2;
2200          }
2201  
2202          /**
2203           * Fires when nonce verification fails.
2204           *
2205           * @since 4.4.0
2206           *
2207           * @param string     $nonce  The invalid nonce.
2208           * @param string|int $action The nonce action.
2209           * @param WP_User    $user   The current user object.
2210           * @param string     $token  The user's session token.
2211           */
2212          do_action( 'wp_verify_nonce_failed', $nonce, $action, $user, $token );
2213  
2214          // Invalid nonce.
2215          return false;
2216      }
2217  endif;
2218  
2219  if ( ! function_exists( 'wp_create_nonce' ) ) :
2220      /**
2221       * Creates a cryptographic token tied to a specific action, user, user session,
2222       * and window of time.
2223       *
2224       * @since 2.0.3
2225       * @since 4.0.0 Session tokens were integrated with nonce creation
2226       *
2227       * @param string|int $action Scalar value to add context to the nonce.
2228       * @return string The token.
2229       */
2230  	function wp_create_nonce( $action = -1 ) {
2231          $user = wp_get_current_user();
2232          $uid  = (int) $user->ID;
2233          if ( ! $uid ) {
2234              /** This filter is documented in wp-includes/pluggable.php */
2235              $uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
2236          }
2237  
2238          $token = wp_get_session_token();
2239          $i     = wp_nonce_tick();
2240  
2241          return substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
2242      }
2243  endif;
2244  
2245  if ( ! function_exists( 'wp_salt' ) ) :
2246      /**
2247       * Returns a salt to add to hashes.
2248       *
2249       * Salts are created using secret keys. Secret keys are located in two places:
2250       * in the database and in the wp-config.php file. The secret key in the database
2251       * is randomly generated and will be appended to the secret keys in wp-config.php.
2252       *
2253       * The secret keys in wp-config.php should be updated to strong, random keys to maximize
2254       * security. Below is an example of how the secret key constants are defined.
2255       * Do not paste this example directly into wp-config.php. Instead, have a
2256       * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
2257       * for you.
2258       *
2259       *     define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
2260       *     define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
2261       *     define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
2262       *     define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
2263       *     define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
2264       *     define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
2265       *     define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
2266       *     define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
2267       *
2268       * Salting passwords helps against tools which has stored hashed values of
2269       * common dictionary strings. The added values makes it harder to crack.
2270       *
2271       * @since 2.5.0
2272       *
2273       * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
2274       *
2275       * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
2276       * @return string Salt value
2277       */
2278  	function wp_salt( $scheme = 'auth' ) {
2279          static $cached_salts = array();
2280          if ( isset( $cached_salts[ $scheme ] ) ) {
2281              /**
2282               * Filters the WordPress salt.
2283               *
2284               * @since 2.5.0
2285               *
2286               * @param string $cached_salt Cached salt for the given scheme.
2287               * @param string $scheme      Authentication scheme. Values include 'auth',
2288               *                            'secure_auth', 'logged_in', and 'nonce'.
2289               */
2290              return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
2291          }
2292  
2293          static $duplicated_keys;
2294          if ( null === $duplicated_keys ) {
2295              $duplicated_keys = array( 'put your unique phrase here' => true );
2296              foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
2297                  foreach ( array( 'KEY', 'SALT' ) as $second ) {
2298                      if ( ! defined( "{$first}_{$second}" ) ) {
2299                          continue;
2300                      }
2301                      $value                     = constant( "{$first}_{$second}" );
2302                      $duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
2303                  }
2304              }
2305          }
2306  
2307          $values = array(
2308              'key'  => '',
2309              'salt' => '',
2310          );
2311          if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
2312              $values['key'] = SECRET_KEY;
2313          }
2314          if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
2315              $values['salt'] = SECRET_SALT;
2316          }
2317  
2318          if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ), true ) ) {
2319              foreach ( array( 'key', 'salt' ) as $type ) {
2320                  $const = strtoupper( "{$scheme}_{$type}" );
2321                  if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
2322                      $values[ $type ] = constant( $const );
2323                  } elseif ( ! $values[ $type ] ) {
2324                      $values[ $type ] = get_site_option( "{$scheme}_{$type}" );
2325                      if ( ! $values[ $type ] ) {
2326                          $values[ $type ] = wp_generate_password( 64, true, true );
2327                          update_site_option( "{$scheme}_{$type}", $values[ $type ] );
2328                      }
2329                  }
2330              }
2331          } else {
2332              if ( ! $values['key'] ) {
2333                  $values['key'] = get_site_option( 'secret_key' );
2334                  if ( ! $values['key'] ) {
2335                      $values['key'] = wp_generate_password( 64, true, true );
2336                      update_site_option( 'secret_key', $values['key'] );
2337                  }
2338              }
2339              $values['salt'] = hash_hmac( 'md5', $scheme, $values['key'] );
2340          }
2341  
2342          $cached_salts[ $scheme ] = $values['key'] . $values['salt'];
2343  
2344          /** This filter is documented in wp-includes/pluggable.php */
2345          return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
2346      }
2347  endif;
2348  
2349  if ( ! function_exists( 'wp_hash' ) ) :
2350      /**
2351       * Get hash of given string.
2352       *
2353       * @since 2.0.3
2354       *
2355       * @param string $data   Plain text to hash
2356       * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce)
2357       * @return string Hash of $data
2358       */
2359  	function wp_hash( $data, $scheme = 'auth' ) {
2360          $salt = wp_salt( $scheme );
2361  
2362          return hash_hmac( 'md5', $data, $salt );
2363      }
2364  endif;
2365  
2366  if ( ! function_exists( 'wp_hash_password' ) ) :
2367      /**
2368       * Create a hash (encrypt) of a plain text password.
2369       *
2370       * For integration with other applications, this function can be overwritten to
2371       * instead use the other package password checking algorithm.
2372       *
2373       * @since 2.5.0
2374       *
2375       * @global PasswordHash $wp_hasher PHPass object
2376       *
2377       * @param string $password Plain text user password to hash
2378       * @return string The hash string of the password
2379       */
2380  	function wp_hash_password( $password ) {
2381          global $wp_hasher;
2382  
2383          if ( empty( $wp_hasher ) ) {
2384              require_once  ABSPATH . WPINC . '/class-phpass.php';
2385              // By default, use the portable hash from phpass.
2386              $wp_hasher = new PasswordHash( 8, true );
2387          }
2388  
2389          return $wp_hasher->HashPassword( trim( $password ) );
2390      }
2391  endif;
2392  
2393  if ( ! function_exists( 'wp_check_password' ) ) :
2394      /**
2395       * Checks the plaintext password against the encrypted Password.
2396       *
2397       * Maintains compatibility between old version and the new cookie authentication
2398       * protocol using PHPass library. The $hash parameter is the encrypted password
2399       * and the function compares the plain text password when encrypted similarly
2400       * against the already encrypted password to see if they match.
2401       *
2402       * For integration with other applications, this function can be overwritten to
2403       * instead use the other package password checking algorithm.
2404       *
2405       * @since 2.5.0
2406       *
2407       * @global PasswordHash $wp_hasher PHPass object used for checking the password
2408       *                                 against the $hash + $password
2409       * @uses PasswordHash::CheckPassword
2410       *
2411       * @param string     $password Plaintext user's password
2412       * @param string     $hash     Hash of the user's password to check against.
2413       * @param string|int $user_id  Optional. User ID.
2414       * @return bool False, if the $password does not match the hashed password
2415       */
2416  	function wp_check_password( $password, $hash, $user_id = '' ) {
2417          global $wp_hasher;
2418  
2419          // If the hash is still md5...
2420          if ( strlen( $hash ) <= 32 ) {
2421              $check = hash_equals( $hash, md5( $password ) );
2422              if ( $check && $user_id ) {
2423                  // Rehash using new hash.
2424                  wp_set_password( $password, $user_id );
2425                  $hash = wp_hash_password( $password );
2426              }
2427  
2428              /**
2429               * Filters whether the plaintext password matches the encrypted password.
2430               *
2431               * @since 2.5.0
2432               *
2433               * @param bool       $check    Whether the passwords match.
2434               * @param string     $password The plaintext password.
2435               * @param string     $hash     The hashed password.
2436               * @param string|int $user_id  User ID. Can be empty.
2437               */
2438              return apply_filters( 'check_password', $check, $password, $hash, $user_id );
2439          }
2440  
2441          // If the stored hash is longer than an MD5,
2442          // presume the new style phpass portable hash.
2443          if ( empty( $wp_hasher ) ) {
2444              require_once  ABSPATH . WPINC . '/class-phpass.php';
2445              // By default, use the portable hash from phpass.
2446              $wp_hasher = new PasswordHash( 8, true );
2447          }
2448  
2449          $check = $wp_hasher->CheckPassword( $password, $hash );
2450  
2451          /** This filter is documented in wp-includes/pluggable.php */
2452          return apply_filters( 'check_password', $check, $password, $hash, $user_id );
2453      }
2454  endif;
2455  
2456  if ( ! function_exists( 'wp_generate_password' ) ) :
2457      /**
2458       * Generates a random password drawn from the defined set of characters.
2459       *
2460       * Uses wp_rand() is used to create passwords with far less predictability
2461       * than similar native PHP functions like `rand()` or `mt_rand()`.
2462       *
2463       * @since 2.5.0
2464       *
2465       * @param int  $length              Optional. The length of password to generate. Default 12.
2466       * @param bool $special_chars       Optional. Whether to include standard special characters.
2467       *                                  Default true.
2468       * @param bool $extra_special_chars Optional. Whether to include other special characters.
2469       *                                  Used when generating secret keys and salts. Default false.
2470       * @return string The random password.
2471       */
2472  	function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
2473          $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
2474          if ( $special_chars ) {
2475              $chars .= '!@#$%^&*()';
2476          }
2477          if ( $extra_special_chars ) {
2478              $chars .= '-_ []{}<>~`+=,.;:/?|';
2479          }
2480  
2481          $password = '';
2482          for ( $i = 0; $i < $length; $i++ ) {
2483              $password .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
2484          }
2485  
2486          /**
2487           * Filters the randomly-generated password.
2488           *
2489           * @since 3.0.0
2490           * @since 5.3.0 Added the `$length`, `$special_chars`, and `$extra_special_chars` parameters.
2491           *
2492           * @param string $password            The generated password.
2493           * @param int    $length              The length of password to generate.
2494           * @param bool   $special_chars       Whether to include standard special characters.
2495           * @param bool   $extra_special_chars Whether to include other special characters.
2496           */
2497          return apply_filters( 'random_password', $password, $length, $special_chars, $extra_special_chars );
2498      }
2499  endif;
2500  
2501  if ( ! function_exists( 'wp_rand' ) ) :
2502      /**
2503       * Generates a random number.
2504       *
2505       * @since 2.6.2
2506       * @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available.
2507       *
2508       * @global string $rnd_value
2509       *
2510       * @param int $min Lower limit for the generated number
2511       * @param int $max Upper limit for the generated number
2512       * @return int A random number between min and max
2513       */
2514  	function wp_rand( $min = 0, $max = 0 ) {
2515          global $rnd_value;
2516  
2517          // Some misconfigured 32-bit environments (Entropy PHP, for example)
2518          // truncate integers larger than PHP_INT_MAX to PHP_INT_MAX rather than overflowing them to floats.
2519          $max_random_number = 3000000000 === 2147483647 ? (float) '4294967295' : 4294967295; // 4294967295 = 0xffffffff
2520  
2521          // We only handle ints, floats are truncated to their integer value.
2522          $min = (int) $min;
2523          $max = (int) $max;
2524  
2525          // Use PHP's CSPRNG, or a compatible method.
2526          static $use_random_int_functionality = true;
2527          if ( $use_random_int_functionality ) {
2528              try {
2529                  $_max = ( 0 != $max ) ? $max : $max_random_number;
2530                  // wp_rand() can accept arguments in either order, PHP cannot.
2531                  $_max = max( $min, $_max );
2532                  $_min = min( $min, $_max );
2533                  $val  = random_int( $_min, $_max );
2534                  if ( false !== $val ) {
2535                      return absint( $val );
2536                  } else {
2537                      $use_random_int_functionality = false;
2538                  }
2539              } catch ( Error $e ) {
2540                  $use_random_int_functionality = false;
2541              } catch ( Exception $e ) {
2542                  $use_random_int_functionality = false;
2543              }
2544          }
2545  
2546          // Reset $rnd_value after 14 uses.
2547          // 32 (md5) + 40 (sha1) + 40 (sha1) / 8 = 14 random numbers from $rnd_value.
2548          if ( strlen( $rnd_value ) < 8 ) {
2549              if ( defined( 'WP_SETUP_CONFIG' ) ) {
2550                  static $seed = '';
2551              } else {
2552                  $seed = get_transient( 'random_seed' );
2553              }
2554              $rnd_value  = md5( uniqid( microtime() . mt_rand(), true ) . $seed );
2555              $rnd_value .= sha1( $rnd_value );
2556              $rnd_value .= sha1( $rnd_value . $seed );
2557              $seed       = md5( $seed . $rnd_value );
2558              if ( ! defined( 'WP_SETUP_CONFIG' ) && ! defined( 'WP_INSTALLING' ) ) {
2559                  set_transient( 'random_seed', $seed );
2560              }
2561          }
2562  
2563          // Take the first 8 digits for our value.
2564          $value = substr( $rnd_value, 0, 8 );
2565  
2566          // Strip the first eight, leaving the remainder for the next call to wp_rand().
2567          $rnd_value = substr( $rnd_value, 8 );
2568  
2569          $value = abs( hexdec( $value ) );
2570  
2571          // Reduce the value to be within the min - max range.
2572          if ( 0 != $max ) {
2573              $value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 );
2574          }
2575  
2576          return abs( (int) $value );
2577      }
2578  endif;
2579  
2580  if ( ! function_exists( 'wp_set_password' ) ) :
2581      /**
2582       * Updates the user's password with a new encrypted one.
2583       *
2584       * For integration with other applications, this function can be overwritten to
2585       * instead use the other package password checking algorithm.
2586       *
2587       * Please note: This function should be used sparingly and is really only meant for single-time
2588       * application. Leveraging this improperly in a plugin or theme could result in an endless loop
2589       * of password resets if precautions are not taken to ensure it does not execute on every page load.
2590       *
2591       * @since 2.5.0
2592       *
2593       * @global wpdb $wpdb WordPress database abstraction object.
2594       *
2595       * @param string $password The plaintext new user password
2596       * @param int    $user_id  User ID
2597       */
2598  	function wp_set_password( $password, $user_id ) {
2599          global $wpdb;
2600  
2601          $hash = wp_hash_password( $password );
2602          $wpdb->update(
2603              $wpdb->users,
2604              array(
2605                  'user_pass'           => $hash,
2606                  'user_activation_key' => '',
2607              ),
2608              array( 'ID' => $user_id )
2609          );
2610  
2611          clean_user_cache( $user_id );
2612      }
2613  endif;
2614  
2615  if ( ! function_exists( 'get_avatar' ) ) :
2616      /**
2617       * Retrieve the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
2618       *
2619       * @since 2.5.0
2620       * @since 4.2.0 Optional `$args` parameter added.
2621       *
2622       * @param mixed  $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash,
2623       *                            user email, WP_User object, WP_Post object, or WP_Comment object.
2624       * @param int    $size        Optional. Height and width of the avatar image file in pixels. Default 96.
2625       * @param string $default     Optional. URL for the default image or a default type. Accepts '404'
2626       *                            (return a 404 instead of a default image), 'retro' (8bit), 'monsterid'
2627       *                            (monster), 'wavatar' (cartoon face), 'indenticon' (the "quilt"),
2628       *                            'mystery', 'mm', or 'mysteryman' (The Oyster Man), 'blank' (transparent GIF),
2629       *                            or 'gravatar_default' (the Gravatar logo). Default is the value of the
2630       *                            'avatar_default' option, with a fallback of 'mystery'.
2631       * @param string $alt         Optional. Alternative text to use in img tag. Default empty.
2632       * @param array  $args {
2633       *     Optional. Extra arguments to retrieve the avatar.
2634       *
2635       *     @type int          $height        Display height of the avatar in pixels. Defaults to $size.
2636       *     @type int          $width         Display width of the avatar in pixels. Defaults to $size.
2637       *     @type bool         $force_default Whether to always show the default image, never the Gravatar. Default false.
2638       *     @type string       $rating        What rating to display avatars up to. Accepts 'G', 'PG', 'R', 'X', and are
2639       *                                       judged in that order. Default is the value of the 'avatar_rating' option.
2640       *     @type string       $scheme        URL scheme to use. See set_url_scheme() for accepted values.
2641       *                                       Default null.
2642       *     @type array|string $class         Array or string of additional classes to add to the img element.
2643       *                                       Default null.
2644       *     @type bool         $force_display Whether to always show the avatar - ignores the show_avatars option.
2645       *                                       Default false.
2646       *     @type string       $loading       Value for the `loading` attribute.
2647       *                                       Default null.
2648       *     @type string       $extra_attr    HTML attributes to insert in the IMG element. Is not sanitized. Default empty.
2649       * }
2650       * @return string|false `<img>` tag for the user's avatar. False on failure.
2651       */
2652  	function get_avatar( $id_or_email, $size = 96, $default = '', $alt = '', $args = null ) {
2653          $defaults = array(
2654              // get_avatar_data() args.
2655              'size'          => 96,
2656              'height'        => null,
2657              'width'         => null,
2658              'default'       => get_option( 'avatar_default', 'mystery' ),
2659              'force_default' => false,
2660              'rating'        => get_option( 'avatar_rating' ),
2661              'scheme'        => null,
2662              'alt'           => '',
2663              'class'         => null,
2664              'force_display' => false,
2665              'loading'       => null,
2666              'extra_attr'    => '',
2667          );
2668  
2669          if ( wp_lazy_loading_enabled( 'img', 'get_avatar' ) ) {
2670              $defaults['loading'] = 'lazy';
2671          }
2672  
2673          if ( empty( $args ) ) {
2674              $args = array();
2675          }
2676  
2677          $args['size']    = (int) $size;
2678          $args['default'] = $default;
2679          $args['alt']     = $alt;
2680  
2681          $args = wp_parse_args( $args, $defaults );
2682  
2683          if ( empty( $args['height'] ) ) {
2684              $args['height'] = $args['size'];
2685          }
2686          if ( empty( $args['width'] ) ) {
2687              $args['width'] = $args['size'];
2688          }
2689  
2690          if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
2691              $id_or_email = get_comment( $id_or_email );
2692          }
2693  
2694          /**
2695           * Allows the HTML for a user's avatar to be returned early.
2696           *
2697           * Passing a non-null value will effectively short-circuit get_avatar(), passing
2698           * the value through the {@see 'get_avatar'} filter and returning early.
2699           *
2700           * @since 4.2.0
2701           *
2702           * @param string|null $avatar      HTML for the user's avatar. Default null.
2703           * @param mixed       $id_or_email The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
2704           *                                 user email, WP_User object, WP_Post object, or WP_Comment object.
2705           * @param array       $args        Arguments passed to get_avatar_url(), after processing.
2706           */
2707          $avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args );
2708  
2709          if ( ! is_null( $avatar ) ) {
2710              /** This filter is documented in wp-includes/pluggable.php */
2711              return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
2712          }
2713  
2714          if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) {
2715              return false;
2716          }
2717  
2718          $url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) );
2719  
2720          $args = get_avatar_data( $id_or_email, $args );
2721  
2722          $url = $args['url'];
2723  
2724          if ( ! $url || is_wp_error( $url ) ) {
2725              return false;
2726          }
2727  
2728          $class = array( 'avatar', 'avatar-' . (int) $args['size'], 'photo' );
2729  
2730          if ( ! $args['found_avatar'] || $args['force_default'] ) {
2731              $class[] = 'avatar-default';
2732          }
2733  
2734          if ( $args['class'] ) {
2735              if ( is_array( $args['class'] ) ) {
2736                  $class = array_merge( $class, $args['class'] );
2737              } else {
2738                  $class[] = $args['class'];
2739              }
2740          }
2741  
2742          // Add `loading` attribute.
2743          $extra_attr = $args['extra_attr'];
2744          $loading    = $args['loading'];
2745  
2746          if ( in_array( $loading, array( 'lazy', 'eager' ), true ) && ! preg_match( '/\bloading\s*=/', $extra_attr ) ) {
2747              if ( ! empty( $extra_attr ) ) {
2748                  $extra_attr .= ' ';
2749              }
2750  
2751              $extra_attr .= "loading='{$loading}'";
2752          }
2753  
2754          $avatar = sprintf(
2755              "<img alt='%s' src='%s' srcset='%s' class='%s' height='%d' width='%d' %s/>",
2756              esc_attr( $args['alt'] ),
2757              esc_url( $url ),
2758              esc_url( $url2x ) . ' 2x',
2759              esc_attr( implode( ' ', $class ) ),
2760              (int) $args['height'],
2761              (int) $args['width'],
2762              $extra_attr
2763          );
2764  
2765          /**
2766           * Filters the HTML for a user's avatar.
2767           *
2768           * @since 2.5.0
2769           * @since 4.2.0 The `$args` parameter was added.
2770           *
2771           * @param string $avatar      HTML for the user's avatar.
2772           * @param mixed  $id_or_email The avatar to retrieve. Accepts a user_id, Gravatar MD5 hash,
2773           *                            user email, WP_User object, WP_Post object, or WP_Comment object.
2774           * @param int    $size        Square avatar width and height in pixels to retrieve.
2775           * @param string $default     URL for the default image or a default type. Accepts '404', 'retro', 'monsterid',
2776           *                            'wavatar', 'indenticon', 'mystery', 'mm', 'mysteryman', 'blank', or 'gravatar_default'.
2777           *                            Default is the value of the 'avatar_default' option, with a fallback of 'mystery'.
2778           * @param string $alt         Alternative text to use in the avatar image tag. Default empty.
2779           * @param array  $args        Arguments passed to get_avatar_data(), after processing.
2780           */
2781          return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
2782      }
2783  endif;
2784  
2785  if ( ! function_exists( 'wp_text_diff' ) ) :
2786      /**
2787       * Displays a human readable HTML representation of the difference between two strings.
2788       *
2789       * The Diff is available for getting the changes between versions. The output is
2790       * HTML, so the primary use is for displaying the changes. If the two strings
2791       * are equivalent, then an empty string will be returned.
2792       *
2793       * @since 2.6.0
2794       *
2795       * @see wp_parse_args() Used to change defaults to user defined settings.
2796       * @uses Text_Diff
2797       * @uses WP_Text_Diff_Renderer_Table
2798       *
2799       * @param string       $left_string  "old" (left) version of string
2800       * @param string       $right_string "new" (right) version of string
2801       * @param string|array $args {
2802       *     Associative array of options to pass to WP_Text_Diff_Renderer_Table().
2803       *
2804       *     @type string $title           Titles the diff in a manner compatible
2805       *                                   with the output. Default empty.
2806       *     @type string $title_left      Change the HTML to the left of the title.
2807       *                                   Default empty.
2808       *     @type string $title_right     Change the HTML to the right of the title.
2809       *                                   Default empty.
2810       *     @type bool   $show_split_view True for split view (two columns), false for
2811       *                                   un-split view (single column). Default true.
2812       * }
2813       * @return string Empty string if strings are equivalent or HTML with differences.
2814       */
2815  	function wp_text_diff( $left_string, $right_string, $args = null ) {
2816          $defaults = array(
2817              'title'           => '',
2818              'title_left'      => '',
2819              'title_right'     => '',
2820              'show_split_view' => true,
2821          );
2822          $args     = wp_parse_args( $args, $defaults );
2823  
2824          if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) {
2825              require  ABSPATH . WPINC . '/wp-diff.php';
2826          }
2827  
2828          $left_string  = normalize_whitespace( $left_string );
2829          $right_string = normalize_whitespace( $right_string );
2830  
2831          $left_lines  = explode( "\n", $left_string );
2832          $right_lines = explode( "\n", $right_string );
2833          $text_diff   = new Text_Diff( $left_lines, $right_lines );
2834          $renderer    = new WP_Text_Diff_Renderer_Table( $args );
2835          $diff        = $renderer->render( $text_diff );
2836  
2837          if ( ! $diff ) {
2838              return '';
2839          }
2840  
2841          $r = "<table class='diff'>\n";
2842  
2843          if ( ! empty( $args['show_split_view'] ) ) {
2844              $r .= "<col class='content diffsplit left' /><col class='content diffsplit middle' /><col class='content diffsplit right' />";
2845          } else {
2846              $r .= "<col class='content' />";
2847          }
2848  
2849          if ( $args['title'] || $args['title_left'] || $args['title_right'] ) {
2850              $r .= '<thead>';
2851          }
2852          if ( $args['title'] ) {
2853              $r .= "<tr class='diff-title'><th colspan='4'>$args[title]</th></tr>\n";
2854          }
2855          if ( $args['title_left'] || $args['title_right'] ) {
2856              $r .= "<tr class='diff-sub-title'>\n";
2857              $r .= "\t<td></td><th>$args[title_left]</th>\n";
2858              $r .= "\t<td></td><th>$args[title_right]</th>\n";
2859              $r .= "</tr>\n";
2860          }
2861          if ( $args['title'] || $args['title_left'] || $args['title_right'] ) {
2862              $r .= "</thead>\n";
2863          }
2864  
2865          $r .= "<tbody>\n$diff\n</tbody>\n";
2866          $r .= '</table>';
2867  
2868          return $r;
2869      }
2870  endif;


Generated : Tue Jan 26 08:20:01 2021 Cross-referenced by PHPXref