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/wp-includes/ -> l10n.php (source)

   1  <?php
   2  /**
   3   * Core Translation API
   4   *
   5   * @package WordPress
   6   * @subpackage i18n
   7   * @since 1.2.0
   8   */
   9  
  10  /**
  11   * Retrieves the current locale.
  12   *
  13   * If the locale is set, then it will filter the locale in the {@see 'locale'}
  14   * filter hook and return the value.
  15   *
  16   * If the locale is not set already, then the WPLANG constant is used if it is
  17   * defined. Then it is filtered through the {@see 'locale'} filter hook and
  18   * the value for the locale global set and the locale is returned.
  19   *
  20   * The process to get the locale should only be done once, but the locale will
  21   * always be filtered using the {@see 'locale'} hook.
  22   *
  23   * @since 1.5.0
  24   *
  25   * @global string $locale           The current locale.
  26   * @global string $wp_local_package Locale code of the package.
  27   *
  28   * @return string The locale of the blog or from the {@see 'locale'} hook.
  29   */
  30  function get_locale() {
  31      global $locale, $wp_local_package;
  32  
  33      if ( isset( $locale ) ) {
  34          /** This filter is documented in wp-includes/l10n.php */
  35          return apply_filters( 'locale', $locale );
  36      }
  37  
  38      if ( isset( $wp_local_package ) ) {
  39          $locale = $wp_local_package;
  40      }
  41  
  42      // WPLANG was defined in wp-config.
  43      if ( defined( 'WPLANG' ) ) {
  44          $locale = WPLANG;
  45      }
  46  
  47      // If multisite, check options.
  48      if ( is_multisite() ) {
  49          // Don't check blog option when installing.
  50          if ( wp_installing() ) {
  51              $ms_locale = get_site_option( 'WPLANG' );
  52          } else {
  53              $ms_locale = get_option( 'WPLANG' );
  54              if ( false === $ms_locale ) {
  55                  $ms_locale = get_site_option( 'WPLANG' );
  56              }
  57          }
  58  
  59          if ( false !== $ms_locale ) {
  60              $locale = $ms_locale;
  61          }
  62      } else {
  63          $db_locale = get_option( 'WPLANG' );
  64          if ( false !== $db_locale ) {
  65              $locale = $db_locale;
  66          }
  67      }
  68  
  69      if ( empty( $locale ) ) {
  70          $locale = 'en_US';
  71      }
  72  
  73      /**
  74       * Filters the locale ID of the WordPress installation.
  75       *
  76       * @since 1.5.0
  77       *
  78       * @param string $locale The locale ID.
  79       */
  80      return apply_filters( 'locale', $locale );
  81  }
  82  
  83  /**
  84   * Retrieves the locale of a user.
  85   *
  86   * If the user has a locale set to a non-empty string then it will be
  87   * returned. Otherwise it returns the locale of get_locale().
  88   *
  89   * @since 4.7.0
  90   *
  91   * @param int|WP_User $user User's ID or a WP_User object. Defaults to current user.
  92   * @return string The locale of the user.
  93   */
  94  function get_user_locale( $user = 0 ) {
  95      $user_object = false;
  96  
  97      if ( 0 === $user && function_exists( 'wp_get_current_user' ) ) {
  98          $user_object = wp_get_current_user();
  99      } elseif ( $user instanceof WP_User ) {
 100          $user_object = $user;
 101      } elseif ( $user && is_numeric( $user ) ) {
 102          $user_object = get_user_by( 'id', $user );
 103      }
 104  
 105      if ( ! $user_object ) {
 106          return get_locale();
 107      }
 108  
 109      $locale = $user_object->locale;
 110  
 111      return $locale ? $locale : get_locale();
 112  }
 113  
 114  /**
 115   * Determines the current locale desired for the request.
 116   *
 117   * @since 5.0.0
 118   *
 119   * @global string $pagenow          The filename of the current screen.
 120   * @global string $wp_local_package Locale code of the package.
 121   *
 122   * @return string The determined locale.
 123   */
 124  function determine_locale() {
 125      /**
 126       * Filters the locale for the current request prior to the default determination process.
 127       *
 128       * Using this filter allows to override the default logic, effectively short-circuiting the function.
 129       *
 130       * @since 5.0.0
 131       *
 132       * @param string|null $locale The locale to return and short-circuit. Default null.
 133       */
 134      $determined_locale = apply_filters( 'pre_determine_locale', null );
 135  
 136      if ( $determined_locale && is_string( $determined_locale ) ) {
 137          return $determined_locale;
 138      }
 139  
 140      if (
 141          isset( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] &&
 142          ( ! empty( $_GET['wp_lang'] ) || ! empty( $_COOKIE['wp_lang'] ) )
 143      ) {
 144          if ( ! empty( $_GET['wp_lang'] ) ) {
 145              $determined_locale = sanitize_locale_name( $_GET['wp_lang'] );
 146          } else {
 147              $determined_locale = sanitize_locale_name( $_COOKIE['wp_lang'] );
 148          }
 149      } elseif (
 150          is_admin() ||
 151          ( isset( $_GET['_locale'] ) && 'user' === $_GET['_locale'] && wp_is_json_request() )
 152      ) {
 153          $determined_locale = get_user_locale();
 154      } elseif (
 155          ( ! empty( $_REQUEST['language'] ) || isset( $GLOBALS['wp_local_package'] ) )
 156          && wp_installing()
 157      ) {
 158          if ( ! empty( $_REQUEST['language'] ) ) {
 159              $determined_locale = sanitize_locale_name( $_REQUEST['language'] );
 160          } else {
 161              $determined_locale = $GLOBALS['wp_local_package'];
 162          }
 163      }
 164  
 165      if ( ! $determined_locale ) {
 166          $determined_locale = get_locale();
 167      }
 168  
 169      /**
 170       * Filters the locale for the current request.
 171       *
 172       * @since 5.0.0
 173       *
 174       * @param string $determined_locale The locale.
 175       */
 176      return apply_filters( 'determine_locale', $determined_locale );
 177  }
 178  
 179  /**
 180   * Retrieves the translation of $text.
 181   *
 182   * If there is no translation, or the text domain isn't loaded, the original text is returned.
 183   *
 184   * *Note:* Don't use translate() directly, use __() or related functions.
 185   *
 186   * @since 2.2.0
 187   * @since 5.5.0 Introduced `gettext-{$domain}` filter.
 188   *
 189   * @param string $text   Text to translate.
 190   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 191   *                       Default 'default'.
 192   * @return string Translated text.
 193   */
 194  function translate( $text, $domain = 'default' ) {
 195      $translations = get_translations_for_domain( $domain );
 196      $translation  = $translations->translate( $text );
 197  
 198      /**
 199       * Filters text with its translation.
 200       *
 201       * @since 2.0.11
 202       *
 203       * @param string $translation Translated text.
 204       * @param string $text        Text to translate.
 205       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 206       */
 207      $translation = apply_filters( 'gettext', $translation, $text, $domain );
 208  
 209      /**
 210       * Filters text with its translation for a domain.
 211       *
 212       * The dynamic portion of the hook name, `$domain`, refers to the text domain.
 213       *
 214       * @since 5.5.0
 215       *
 216       * @param string $translation Translated text.
 217       * @param string $text        Text to translate.
 218       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 219       */
 220      $translation = apply_filters( "gettext_{$domain}", $translation, $text, $domain );
 221  
 222      return $translation;
 223  }
 224  
 225  /**
 226   * Removes last item on a pipe-delimited string.
 227   *
 228   * Meant for removing the last item in a string, such as 'Role name|User role'. The original
 229   * string will be returned if no pipe '|' characters are found in the string.
 230   *
 231   * @since 2.8.0
 232   *
 233   * @param string $text A pipe-delimited string.
 234   * @return string Either $text or everything before the last pipe.
 235   */
 236  function before_last_bar( $text ) {
 237      $last_bar = strrpos( $text, '|' );
 238      if ( false === $last_bar ) {
 239          return $text;
 240      } else {
 241          return substr( $text, 0, $last_bar );
 242      }
 243  }
 244  
 245  /**
 246   * Retrieves the translation of $text in the context defined in $context.
 247   *
 248   * If there is no translation, or the text domain isn't loaded, the original text is returned.
 249   *
 250   * *Note:* Don't use translate_with_gettext_context() directly, use _x() or related functions.
 251   *
 252   * @since 2.8.0
 253   * @since 5.5.0 Introduced `gettext_with_context-{$domain}` filter.
 254   *
 255   * @param string $text    Text to translate.
 256   * @param string $context Context information for the translators.
 257   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 258   *                        Default 'default'.
 259   * @return string Translated text on success, original text on failure.
 260   */
 261  function translate_with_gettext_context( $text, $context, $domain = 'default' ) {
 262      $translations = get_translations_for_domain( $domain );
 263      $translation  = $translations->translate( $text, $context );
 264  
 265      /**
 266       * Filters text with its translation based on context information.
 267       *
 268       * @since 2.8.0
 269       *
 270       * @param string $translation Translated text.
 271       * @param string $text        Text to translate.
 272       * @param string $context     Context information for the translators.
 273       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 274       */
 275      $translation = apply_filters( 'gettext_with_context', $translation, $text, $context, $domain );
 276  
 277      /**
 278       * Filters text with its translation based on context information for a domain.
 279       *
 280       * The dynamic portion of the hook name, `$domain`, refers to the text domain.
 281       *
 282       * @since 5.5.0
 283       *
 284       * @param string $translation Translated text.
 285       * @param string $text        Text to translate.
 286       * @param string $context     Context information for the translators.
 287       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 288       */
 289      $translation = apply_filters( "gettext_with_context_{$domain}", $translation, $text, $context, $domain );
 290  
 291      return $translation;
 292  }
 293  
 294  /**
 295   * Retrieves the translation of $text.
 296   *
 297   * If there is no translation, or the text domain isn't loaded, the original text is returned.
 298   *
 299   * @since 2.1.0
 300   *
 301   * @param string $text   Text to translate.
 302   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 303   *                       Default 'default'.
 304   * @return string Translated text.
 305   */
 306  function __( $text, $domain = 'default' ) {
 307      return translate( $text, $domain );
 308  }
 309  
 310  /**
 311   * Retrieves the translation of $text and escapes it for safe use in an attribute.
 312   *
 313   * If there is no translation, or the text domain isn't loaded, the original text is returned.
 314   *
 315   * @since 2.8.0
 316   *
 317   * @param string $text   Text to translate.
 318   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 319   *                       Default 'default'.
 320   * @return string Translated text on success, original text on failure.
 321   */
 322  function esc_attr__( $text, $domain = 'default' ) {
 323      return esc_attr( translate( $text, $domain ) );
 324  }
 325  
 326  /**
 327   * Retrieves the translation of $text and escapes it for safe use in HTML output.
 328   *
 329   * If there is no translation, or the text domain isn't loaded, the original text
 330   * is escaped and returned.
 331   *
 332   * @since 2.8.0
 333   *
 334   * @param string $text   Text to translate.
 335   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 336   *                       Default 'default'.
 337   * @return string Translated text.
 338   */
 339  function esc_html__( $text, $domain = 'default' ) {
 340      return esc_html( translate( $text, $domain ) );
 341  }
 342  
 343  /**
 344   * Displays translated text.
 345   *
 346   * @since 1.2.0
 347   *
 348   * @param string $text   Text to translate.
 349   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 350   *                       Default 'default'.
 351   */
 352  function _e( $text, $domain = 'default' ) {
 353      echo translate( $text, $domain );
 354  }
 355  
 356  /**
 357   * Displays translated text that has been escaped for safe use in an attribute.
 358   *
 359   * Encodes `< > & " '` (less than, greater than, ampersand, double quote, single quote).
 360   * Will never double encode entities.
 361   *
 362   * If you need the value for use in PHP, use esc_attr__().
 363   *
 364   * @since 2.8.0
 365   *
 366   * @param string $text   Text to translate.
 367   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 368   *                       Default 'default'.
 369   */
 370  function esc_attr_e( $text, $domain = 'default' ) {
 371      echo esc_attr( translate( $text, $domain ) );
 372  }
 373  
 374  /**
 375   * Displays translated text that has been escaped for safe use in HTML output.
 376   *
 377   * If there is no translation, or the text domain isn't loaded, the original text
 378   * is escaped and displayed.
 379   *
 380   * If you need the value for use in PHP, use esc_html__().
 381   *
 382   * @since 2.8.0
 383   *
 384   * @param string $text   Text to translate.
 385   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 386   *                       Default 'default'.
 387   */
 388  function esc_html_e( $text, $domain = 'default' ) {
 389      echo esc_html( translate( $text, $domain ) );
 390  }
 391  
 392  /**
 393   * Retrieves translated string with gettext context.
 394   *
 395   * Quite a few times, there will be collisions with similar translatable text
 396   * found in more than two places, but with different translated context.
 397   *
 398   * By including the context in the pot file, translators can translate the two
 399   * strings differently.
 400   *
 401   * @since 2.8.0
 402   *
 403   * @param string $text    Text to translate.
 404   * @param string $context Context information for the translators.
 405   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 406   *                        Default 'default'.
 407   * @return string Translated context string without pipe.
 408   */
 409  function _x( $text, $context, $domain = 'default' ) {
 410      return translate_with_gettext_context( $text, $context, $domain );
 411  }
 412  
 413  /**
 414   * Displays translated string with gettext context.
 415   *
 416   * @since 3.0.0
 417   *
 418   * @param string $text    Text to translate.
 419   * @param string $context Context information for the translators.
 420   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 421   *                        Default 'default'.
 422   */
 423  function _ex( $text, $context, $domain = 'default' ) {
 424      echo _x( $text, $context, $domain );
 425  }
 426  
 427  /**
 428   * Translates string with gettext context, and escapes it for safe use in an attribute.
 429   *
 430   * If there is no translation, or the text domain isn't loaded, the original text
 431   * is escaped and returned.
 432   *
 433   * @since 2.8.0
 434   *
 435   * @param string $text    Text to translate.
 436   * @param string $context Context information for the translators.
 437   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 438   *                        Default 'default'.
 439   * @return string Translated text.
 440   */
 441  function esc_attr_x( $text, $context, $domain = 'default' ) {
 442      return esc_attr( translate_with_gettext_context( $text, $context, $domain ) );
 443  }
 444  
 445  /**
 446   * Translates string with gettext context, and escapes it for safe use in HTML output.
 447   *
 448   * If there is no translation, or the text domain isn't loaded, the original text
 449   * is escaped and returned.
 450   *
 451   * @since 2.9.0
 452   *
 453   * @param string $text    Text to translate.
 454   * @param string $context Context information for the translators.
 455   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 456   *                        Default 'default'.
 457   * @return string Translated text.
 458   */
 459  function esc_html_x( $text, $context, $domain = 'default' ) {
 460      return esc_html( translate_with_gettext_context( $text, $context, $domain ) );
 461  }
 462  
 463  /**
 464   * Translates and retrieves the singular or plural form based on the supplied number.
 465   *
 466   * Used when you want to use the appropriate form of a string based on whether a
 467   * number is singular or plural.
 468   *
 469   * Example:
 470   *
 471   *     printf( _n( '%s person', '%s people', $count, 'text-domain' ), number_format_i18n( $count ) );
 472   *
 473   * @since 2.8.0
 474   * @since 5.5.0 Introduced `ngettext-{$domain}` filter.
 475   *
 476   * @param string $single The text to be used if the number is singular.
 477   * @param string $plural The text to be used if the number is plural.
 478   * @param int    $number The number to compare against to use either the singular or plural form.
 479   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
 480   *                       Default 'default'.
 481   * @return string The translated singular or plural form.
 482   */
 483  function _n( $single, $plural, $number, $domain = 'default' ) {
 484      $translations = get_translations_for_domain( $domain );
 485      $translation  = $translations->translate_plural( $single, $plural, $number );
 486  
 487      /**
 488       * Filters the singular or plural form of a string.
 489       *
 490       * @since 2.2.0
 491       *
 492       * @param string $translation Translated text.
 493       * @param string $single      The text to be used if the number is singular.
 494       * @param string $plural      The text to be used if the number is plural.
 495       * @param int    $number      The number to compare against to use either the singular or plural form.
 496       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 497       */
 498      $translation = apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain );
 499  
 500      /**
 501       * Filters the singular or plural form of a string for a domain.
 502       *
 503       * The dynamic portion of the hook name, `$domain`, refers to the text domain.
 504       *
 505       * @since 5.5.0
 506       *
 507       * @param string $translation Translated text.
 508       * @param string $single      The text to be used if the number is singular.
 509       * @param string $plural      The text to be used if the number is plural.
 510       * @param int    $number      The number to compare against to use either the singular or plural form.
 511       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 512       */
 513      $translation = apply_filters( "ngettext_{$domain}", $translation, $single, $plural, $number, $domain );
 514  
 515      return $translation;
 516  }
 517  
 518  /**
 519   * Translates and retrieves the singular or plural form based on the supplied number, with gettext context.
 520   *
 521   * This is a hybrid of _n() and _x(). It supports context and plurals.
 522   *
 523   * Used when you want to use the appropriate form of a string with context based on whether a
 524   * number is singular or plural.
 525   *
 526   * Example of a generic phrase which is disambiguated via the context parameter:
 527   *
 528   *     printf( _nx( '%s group', '%s groups', $people, 'group of people', 'text-domain' ), number_format_i18n( $people ) );
 529   *     printf( _nx( '%s group', '%s groups', $animals, 'group of animals', 'text-domain' ), number_format_i18n( $animals ) );
 530   *
 531   * @since 2.8.0
 532   * @since 5.5.0 Introduced `ngettext_with_context-{$domain}` filter.
 533   *
 534   * @param string $single  The text to be used if the number is singular.
 535   * @param string $plural  The text to be used if the number is plural.
 536   * @param int    $number  The number to compare against to use either the singular or plural form.
 537   * @param string $context Context information for the translators.
 538   * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
 539   *                        Default 'default'.
 540   * @return string The translated singular or plural form.
 541   */
 542  function _nx( $single, $plural, $number, $context, $domain = 'default' ) {
 543      $translations = get_translations_for_domain( $domain );
 544      $translation  = $translations->translate_plural( $single, $plural, $number, $context );
 545  
 546      /**
 547       * Filters the singular or plural form of a string with gettext context.
 548       *
 549       * @since 2.8.0
 550       *
 551       * @param string $translation Translated text.
 552       * @param string $single      The text to be used if the number is singular.
 553       * @param string $plural      The text to be used if the number is plural.
 554       * @param int    $number      The number to compare against to use either the singular or plural form.
 555       * @param string $context     Context information for the translators.
 556       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 557       */
 558      $translation = apply_filters( 'ngettext_with_context', $translation, $single, $plural, $number, $context, $domain );
 559  
 560      /**
 561       * Filters the singular or plural form of a string with gettext context for a domain.
 562       *
 563       * The dynamic portion of the hook name, `$domain`, refers to the text domain.
 564       *
 565       * @since 5.5.0
 566       *
 567       * @param string $translation Translated text.
 568       * @param string $single      The text to be used if the number is singular.
 569       * @param string $plural      The text to be used if the number is plural.
 570       * @param int    $number      The number to compare against to use either the singular or plural form.
 571       * @param string $context     Context information for the translators.
 572       * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
 573       */
 574      $translation = apply_filters( "ngettext_with_context_{$domain}", $translation, $single, $plural, $number, $context, $domain );
 575  
 576      return $translation;
 577  }
 578  
 579  /**
 580   * Registers plural strings in POT file, but does not translate them.
 581   *
 582   * Used when you want to keep structures with translatable plural
 583   * strings and use them later when the number is known.
 584   *
 585   * Example:
 586   *
 587   *     $message = _n_noop( '%s post', '%s posts', 'text-domain' );
 588   *     ...
 589   *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
 590   *
 591   * @since 2.5.0
 592   *
 593   * @param string $singular Singular form to be localized.
 594   * @param string $plural   Plural form to be localized.
 595   * @param string $domain   Optional. Text domain. Unique identifier for retrieving translated strings.
 596   *                         Default null.
 597   * @return array {
 598   *     Array of translation information for the strings.
 599   *
 600   *     @type string      $0        Singular form to be localized. No longer used.
 601   *     @type string      $1        Plural form to be localized. No longer used.
 602   *     @type string      $singular Singular form to be localized.
 603   *     @type string      $plural   Plural form to be localized.
 604   *     @type null        $context  Context information for the translators.
 605   *     @type string|null $domain   Text domain.
 606   * }
 607   */
 608  function _n_noop( $singular, $plural, $domain = null ) {
 609      return array(
 610          0          => $singular,
 611          1          => $plural,
 612          'singular' => $singular,
 613          'plural'   => $plural,
 614          'context'  => null,
 615          'domain'   => $domain,
 616      );
 617  }
 618  
 619  /**
 620   * Registers plural strings with gettext context in POT file, but does not translate them.
 621   *
 622   * Used when you want to keep structures with translatable plural
 623   * strings and use them later when the number is known.
 624   *
 625   * Example of a generic phrase which is disambiguated via the context parameter:
 626   *
 627   *     $messages = array(
 628   *          'people'  => _nx_noop( '%s group', '%s groups', 'people', 'text-domain' ),
 629   *          'animals' => _nx_noop( '%s group', '%s groups', 'animals', 'text-domain' ),
 630   *     );
 631   *     ...
 632   *     $message = $messages[ $type ];
 633   *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
 634   *
 635   * @since 2.8.0
 636   *
 637   * @param string $singular Singular form to be localized.
 638   * @param string $plural   Plural form to be localized.
 639   * @param string $context  Context information for the translators.
 640   * @param string $domain   Optional. Text domain. Unique identifier for retrieving translated strings.
 641   *                         Default null.
 642   * @return array {
 643   *     Array of translation information for the strings.
 644   *
 645   *     @type string      $0        Singular form to be localized. No longer used.
 646   *     @type string      $1        Plural form to be localized. No longer used.
 647   *     @type string      $2        Context information for the translators. No longer used.
 648   *     @type string      $singular Singular form to be localized.
 649   *     @type string      $plural   Plural form to be localized.
 650   *     @type string      $context  Context information for the translators.
 651   *     @type string|null $domain   Text domain.
 652   * }
 653   */
 654  function _nx_noop( $singular, $plural, $context, $domain = null ) {
 655      return array(
 656          0          => $singular,
 657          1          => $plural,
 658          2          => $context,
 659          'singular' => $singular,
 660          'plural'   => $plural,
 661          'context'  => $context,
 662          'domain'   => $domain,
 663      );
 664  }
 665  
 666  /**
 667   * Translates and returns the singular or plural form of a string that's been registered
 668   * with _n_noop() or _nx_noop().
 669   *
 670   * Used when you want to use a translatable plural string once the number is known.
 671   *
 672   * Example:
 673   *
 674   *     $message = _n_noop( '%s post', '%s posts', 'text-domain' );
 675   *     ...
 676   *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
 677   *
 678   * @since 3.1.0
 679   *
 680   * @param array  $nooped_plural {
 681   *     Array that is usually a return value from _n_noop() or _nx_noop().
 682   *
 683   *     @type string      $singular Singular form to be localized.
 684   *     @type string      $plural   Plural form to be localized.
 685   *     @type string|null $context  Context information for the translators.
 686   *     @type string|null $domain   Text domain.
 687   * }
 688   * @param int    $count         Number of objects.
 689   * @param string $domain        Optional. Text domain. Unique identifier for retrieving translated strings. If $nooped_plural contains
 690   *                              a text domain passed to _n_noop() or _nx_noop(), it will override this value. Default 'default'.
 691   * @return string Either $singular or $plural translated text.
 692   */
 693  function translate_nooped_plural( $nooped_plural, $count, $domain = 'default' ) {
 694      if ( $nooped_plural['domain'] ) {
 695          $domain = $nooped_plural['domain'];
 696      }
 697  
 698      if ( $nooped_plural['context'] ) {
 699          return _nx( $nooped_plural['singular'], $nooped_plural['plural'], $count, $nooped_plural['context'], $domain );
 700      } else {
 701          return _n( $nooped_plural['singular'], $nooped_plural['plural'], $count, $domain );
 702      }
 703  }
 704  
 705  /**
 706   * Loads a .mo file into the text domain $domain.
 707   *
 708   * If the text domain already exists, the translations will be merged. If both
 709   * sets have the same string, the translation from the original value will be taken.
 710   *
 711   * On success, the .mo file will be placed in the $l10n global by $domain
 712   * and will be a MO object.
 713   *
 714   * @since 1.5.0
 715   * @since 6.1.0 Added the `$locale` parameter.
 716   *
 717   * @global MO[]                   $l10n                   An array of all currently loaded text domains.
 718   * @global MO[]                   $l10n_unloaded          An array of all text domains that have been unloaded again.
 719   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
 720   *
 721   * @param string $domain Text domain. Unique identifier for retrieving translated strings.
 722   * @param string $mofile Path to the .mo file.
 723   * @param string $locale Optional. Locale. Default is the current locale.
 724   * @return bool True on success, false on failure.
 725   */
 726  function load_textdomain( $domain, $mofile, $locale = null ) {
 727      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
 728      global $l10n, $l10n_unloaded, $wp_textdomain_registry;
 729  
 730      $l10n_unloaded = (array) $l10n_unloaded;
 731  
 732      if ( ! is_string( $domain ) ) {
 733          return false;
 734      }
 735  
 736      /**
 737       * Filters whether to short-circuit loading .mo file.
 738       *
 739       * Returning a non-null value from the filter will effectively short-circuit
 740       * the loading, returning the passed value instead.
 741       *
 742       * @since 6.3.0
 743       *
 744       * @param bool|null   $loaded The result of loading a .mo file. Default null.
 745       * @param string      $domain Text domain. Unique identifier for retrieving translated strings.
 746       * @param string      $mofile Path to the MO file.
 747       * @param string|null $locale Locale.
 748       */
 749      $loaded = apply_filters( 'pre_load_textdomain', null, $domain, $mofile, $locale );
 750      if ( null !== $loaded ) {
 751          if ( true === $loaded ) {
 752              unset( $l10n_unloaded[ $domain ] );
 753          }
 754  
 755          return $loaded;
 756      }
 757  
 758      /**
 759       * Filters whether to override the .mo file loading.
 760       *
 761       * @since 2.9.0
 762       * @since 6.2.0 Added the `$locale` parameter.
 763       *
 764       * @param bool        $override Whether to override the .mo file loading. Default false.
 765       * @param string      $domain   Text domain. Unique identifier for retrieving translated strings.
 766       * @param string      $mofile   Path to the MO file.
 767       * @param string|null $locale   Locale.
 768       */
 769      $plugin_override = apply_filters( 'override_load_textdomain', false, $domain, $mofile, $locale );
 770  
 771      if ( true === (bool) $plugin_override ) {
 772          unset( $l10n_unloaded[ $domain ] );
 773  
 774          return true;
 775      }
 776  
 777      /**
 778       * Fires before the MO translation file is loaded.
 779       *
 780       * @since 2.9.0
 781       *
 782       * @param string $domain Text domain. Unique identifier for retrieving translated strings.
 783       * @param string $mofile Path to the .mo file.
 784       */
 785      do_action( 'load_textdomain', $domain, $mofile );
 786  
 787      /**
 788       * Filters MO file path for loading translations for a specific text domain.
 789       *
 790       * @since 2.9.0
 791       *
 792       * @param string $mofile Path to the MO file.
 793       * @param string $domain Text domain. Unique identifier for retrieving translated strings.
 794       */
 795      $mofile = apply_filters( 'load_textdomain_mofile', $mofile, $domain );
 796  
 797      if ( ! $locale ) {
 798          $locale = determine_locale();
 799      }
 800  
 801      $i18n_controller = WP_Translation_Controller::get_instance();
 802  
 803      // Ensures the correct locale is set as the current one, in case it was filtered.
 804      $i18n_controller->set_locale( $locale );
 805  
 806      /**
 807       * Filters the preferred file format for translation files.
 808       *
 809       * Can be used to disable the use of PHP files for translations.
 810       *
 811       * @since 6.5.0
 812       *
 813       * @param string $preferred_format Preferred file format. Possible values: 'php', 'mo'. Default: 'php'.
 814       * @param string $domain           The text domain.
 815       */
 816      $preferred_format = apply_filters( 'translation_file_format', 'php', $domain );
 817      if ( ! in_array( $preferred_format, array( 'php', 'mo' ), true ) ) {
 818          $preferred_format = 'php';
 819      }
 820  
 821      $translation_files = array();
 822  
 823      if ( 'mo' !== $preferred_format ) {
 824          $translation_files[] = substr_replace( $mofile, ".l10n.$preferred_format", - strlen( '.mo' ) );
 825      }
 826  
 827      $translation_files[] = $mofile;
 828  
 829      foreach ( $translation_files as $file ) {
 830          /**
 831           * Filters the file path for loading translations for the given text domain.
 832           *
 833           * Similar to the {@see 'load_textdomain_mofile'} filter with the difference that
 834           * the file path could be for an MO or PHP file.
 835           *
 836           * @since 6.5.0
 837           * @since 6.6.0 Added the `$locale` parameter.
 838           *
 839           * @param string $file   Path to the translation file to load.
 840           * @param string $domain The text domain.
 841           * @param string $locale The locale.
 842           */
 843          $file = (string) apply_filters( 'load_translation_file', $file, $domain, $locale );
 844  
 845          $success = $i18n_controller->load_file( $file, $domain, $locale );
 846  
 847          if ( $success ) {
 848              if ( isset( $l10n[ $domain ] ) && $l10n[ $domain ] instanceof MO ) {
 849                  $i18n_controller->load_file( $l10n[ $domain ]->get_filename(), $domain, $locale );
 850              }
 851  
 852              // Unset NOOP_Translations reference in get_translations_for_domain().
 853              unset( $l10n[ $domain ] );
 854  
 855              $l10n[ $domain ] = new WP_Translations( $i18n_controller, $domain );
 856  
 857              $wp_textdomain_registry->set( $domain, $locale, dirname( $file ) );
 858  
 859              return true;
 860          }
 861      }
 862  
 863      return false;
 864  }
 865  
 866  /**
 867   * Unloads translations for a text domain.
 868   *
 869   * @since 3.0.0
 870   * @since 6.1.0 Added the `$reloadable` parameter.
 871   *
 872   * @global MO[] $l10n          An array of all currently loaded text domains.
 873   * @global MO[] $l10n_unloaded An array of all text domains that have been unloaded again.
 874   *
 875   * @param string $domain     Text domain. Unique identifier for retrieving translated strings.
 876   * @param bool   $reloadable Whether the text domain can be loaded just-in-time again.
 877   * @return bool Whether textdomain was unloaded.
 878   */
 879  function unload_textdomain( $domain, $reloadable = false ) {
 880      global $l10n, $l10n_unloaded;
 881  
 882      $l10n_unloaded = (array) $l10n_unloaded;
 883  
 884      /**
 885       * Filters whether to override the text domain unloading.
 886       *
 887       * @since 3.0.0
 888       * @since 6.1.0 Added the `$reloadable` parameter.
 889       *
 890       * @param bool   $override   Whether to override the text domain unloading. Default false.
 891       * @param string $domain     Text domain. Unique identifier for retrieving translated strings.
 892       * @param bool   $reloadable Whether the text domain can be loaded just-in-time again.
 893       */
 894      $plugin_override = apply_filters( 'override_unload_textdomain', false, $domain, $reloadable );
 895  
 896      if ( $plugin_override ) {
 897          if ( ! $reloadable ) {
 898              $l10n_unloaded[ $domain ] = true;
 899          }
 900  
 901          return true;
 902      }
 903  
 904      /**
 905       * Fires before the text domain is unloaded.
 906       *
 907       * @since 3.0.0
 908       * @since 6.1.0 Added the `$reloadable` parameter.
 909       *
 910       * @param string $domain     Text domain. Unique identifier for retrieving translated strings.
 911       * @param bool   $reloadable Whether the text domain can be loaded just-in-time again.
 912       */
 913      do_action( 'unload_textdomain', $domain, $reloadable );
 914  
 915      // Since multiple locales are supported, reloadable text domains don't actually need to be unloaded.
 916      if ( ! $reloadable ) {
 917          WP_Translation_Controller::get_instance()->unload_textdomain( $domain );
 918      }
 919  
 920      if ( isset( $l10n[ $domain ] ) ) {
 921          if ( $l10n[ $domain ] instanceof NOOP_Translations ) {
 922              unset( $l10n[ $domain ] );
 923  
 924              return false;
 925          }
 926  
 927          unset( $l10n[ $domain ] );
 928  
 929          if ( ! $reloadable ) {
 930              $l10n_unloaded[ $domain ] = true;
 931          }
 932  
 933          return true;
 934      }
 935  
 936      return false;
 937  }
 938  
 939  /**
 940   * Loads default translated strings based on locale.
 941   *
 942   * Loads the .mo file in WP_LANG_DIR constant path from WordPress root.
 943   * The translated (.mo) file is named based on the locale.
 944   *
 945   * @see load_textdomain()
 946   *
 947   * @since 1.5.0
 948   *
 949   * @param string $locale Optional. Locale to load. Default is the value of get_locale().
 950   * @return bool Whether the textdomain was loaded.
 951   */
 952  function load_default_textdomain( $locale = null ) {
 953      if ( null === $locale ) {
 954          $locale = determine_locale();
 955      }
 956  
 957      // Unload previously loaded strings so we can switch translations.
 958      unload_textdomain( 'default', true );
 959  
 960      $return = load_textdomain( 'default', WP_LANG_DIR . "/$locale.mo", $locale );
 961  
 962      if ( ( is_multisite() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) && ! file_exists( WP_LANG_DIR . "/admin-$locale.mo" ) ) {
 963          load_textdomain( 'default', WP_LANG_DIR . "/ms-$locale.mo", $locale );
 964          return $return;
 965      }
 966  
 967      if ( is_admin() || wp_installing() || ( defined( 'WP_REPAIRING' ) && WP_REPAIRING ) || doing_action( 'wp_maybe_auto_update' ) ) {
 968          load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo", $locale );
 969      }
 970  
 971      if ( is_network_admin() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) {
 972          load_textdomain( 'default', WP_LANG_DIR . "/admin-network-$locale.mo", $locale );
 973      }
 974  
 975      return $return;
 976  }
 977  
 978  /**
 979   * Loads a plugin's translated strings.
 980   *
 981   * If the path is not given then it will be the root of the plugin directory.
 982   *
 983   * The .mo file should be named based on the text domain with a dash, and then the locale exactly.
 984   *
 985   * @since 1.5.0
 986   * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
 987   * @since 6.7.0 Translations are no longer immediately loaded, but handed off to the just-in-time loading mechanism.
 988   *
 989   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
 990   * @global array<string, WP_Translations|NOOP_Translations> $l10n An array of all currently loaded text domains.
 991   *
 992   * @param string       $domain          Unique identifier for retrieving translated strings
 993   * @param string|false $deprecated      Optional. Deprecated. Use the $plugin_rel_path parameter instead.
 994   *                                      Default false.
 995   * @param string|false $plugin_rel_path Optional. Relative path to WP_PLUGIN_DIR where the .mo file resides.
 996   *                                      Default false.
 997   * @return bool True when textdomain is successfully loaded, false otherwise.
 998   */
 999  function load_plugin_textdomain( $domain, $deprecated = false, $plugin_rel_path = false ) {
1000      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
1001      /** @var array<string, WP_Translations|NOOP_Translations> $l10n */
1002      global $wp_textdomain_registry, $l10n;
1003  
1004      if ( ! is_string( $domain ) ) {
1005          return false;
1006      }
1007  
1008      if ( false !== $plugin_rel_path ) {
1009          $path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
1010      } elseif ( false !== $deprecated ) {
1011          _deprecated_argument( __FUNCTION__, '2.7.0' );
1012          $path = ABSPATH . trim( $deprecated, '/' );
1013      } else {
1014          $path = WP_PLUGIN_DIR;
1015      }
1016  
1017      $wp_textdomain_registry->set_custom_path( $domain, $path );
1018  
1019      // If just-in-time loading was triggered before, reset the entry so it can be tried again.
1020      if ( isset( $l10n[ $domain ] ) && $l10n[ $domain ] instanceof NOOP_Translations ) {
1021          unset( $l10n[ $domain ] );
1022      }
1023  
1024      return true;
1025  }
1026  
1027  /**
1028   * Loads the translated strings for a plugin residing in the mu-plugins directory.
1029   *
1030   * @since 3.0.0
1031   * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
1032   * @since 6.7.0 Translations are no longer immediately loaded, but handed off to the just-in-time loading mechanism.
1033   *
1034   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1035   * @global array<string, WP_Translations|NOOP_Translations> $l10n An array of all currently loaded text domains.
1036   *
1037   * @param string $domain             Text domain. Unique identifier for retrieving translated strings.
1038   * @param string $mu_plugin_rel_path Optional. Relative to `WPMU_PLUGIN_DIR` directory in which the .mo
1039   *                                   file resides. Default empty string.
1040   * @return bool True when textdomain is successfully loaded, false otherwise.
1041   */
1042  function load_muplugin_textdomain( $domain, $mu_plugin_rel_path = '' ) {
1043      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
1044      /** @var array<string, WP_Translations|NOOP_Translations> $l10n */
1045      global $wp_textdomain_registry, $l10n;
1046  
1047      if ( ! is_string( $domain ) ) {
1048          return false;
1049      }
1050  
1051      $path = WPMU_PLUGIN_DIR . '/' . ltrim( $mu_plugin_rel_path, '/' );
1052  
1053      $wp_textdomain_registry->set_custom_path( $domain, $path );
1054  
1055      // If just-in-time loading was triggered before, reset the entry so it can be tried again.
1056      if ( isset( $l10n[ $domain ] ) && $l10n[ $domain ] instanceof NOOP_Translations ) {
1057          unset( $l10n[ $domain ] );
1058      }
1059  
1060      return true;
1061  }
1062  
1063  /**
1064   * Loads the theme's translated strings.
1065   *
1066   * If the current locale exists as a .mo file in the theme's root directory, it
1067   * will be included in the translated strings by the $domain.
1068   *
1069   * The .mo files must be named based on the locale exactly.
1070   *
1071   * @since 1.5.0
1072   * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
1073   * @since 6.7.0 Translations are no longer immediately loaded, but handed off to the just-in-time loading mechanism.
1074   *
1075   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1076   * @global array<string, WP_Translations|NOOP_Translations> $l10n An array of all currently loaded text domains.
1077   *
1078   * @param string       $domain Text domain. Unique identifier for retrieving translated strings.
1079   * @param string|false $path   Optional. Path to the directory containing the .mo file.
1080   *                             Default false.
1081   * @return bool True when textdomain is successfully loaded, false otherwise.
1082   */
1083  function load_theme_textdomain( $domain, $path = false ) {
1084      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
1085      /** @var array<string, WP_Translations|NOOP_Translations> $l10n */
1086      global $wp_textdomain_registry, $l10n;
1087  
1088      if ( ! is_string( $domain ) ) {
1089          return false;
1090      }
1091  
1092      if ( ! $path ) {
1093          $path = get_template_directory();
1094      }
1095  
1096      $wp_textdomain_registry->set_custom_path( $domain, $path );
1097  
1098      // If just-in-time loading was triggered before, reset the entry so it can be tried again.
1099      if ( isset( $l10n[ $domain ] ) && $l10n[ $domain ] instanceof NOOP_Translations ) {
1100          unset( $l10n[ $domain ] );
1101      }
1102  
1103      return true;
1104  }
1105  
1106  /**
1107   * Loads the child theme's translated strings.
1108   *
1109   * If the current locale exists as a .mo file in the child theme's
1110   * root directory, it will be included in the translated strings by the $domain.
1111   *
1112   * The .mo files must be named based on the locale exactly.
1113   *
1114   * @since 2.9.0
1115   *
1116   * @param string       $domain Text domain. Unique identifier for retrieving translated strings.
1117   * @param string|false $path   Optional. Path to the directory containing the .mo file.
1118   *                             Default false.
1119   * @return bool True when the theme textdomain is successfully loaded, false otherwise.
1120   */
1121  function load_child_theme_textdomain( $domain, $path = false ) {
1122      if ( ! $path ) {
1123          $path = get_stylesheet_directory();
1124      }
1125      return load_theme_textdomain( $domain, $path );
1126  }
1127  
1128  /**
1129   * Loads the script translated strings.
1130   *
1131   * @since 5.0.0
1132   * @since 5.0.2 Uses load_script_translations() to load translation data.
1133   * @since 5.1.0 The `$domain` parameter was made optional.
1134   *
1135   * @see WP_Scripts::set_translations()
1136   *
1137   * @param string $handle Name of the script to register a translation domain to.
1138   * @param string $domain Optional. Text domain. Default 'default'.
1139   * @param string $path   Optional. The full file path to the directory containing translation files.
1140   * @return string|false The translated strings in JSON encoding on success,
1141   *                      false if the script textdomain could not be loaded.
1142   */
1143  function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
1144      $wp_scripts = wp_scripts();
1145  
1146      if ( ! isset( $wp_scripts->registered[ $handle ] ) ) {
1147          return false;
1148      }
1149  
1150      $src = $wp_scripts->registered[ $handle ]->src;
1151  
1152      if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $wp_scripts->content_url && str_starts_with( $src, $wp_scripts->content_url ) ) ) {
1153          $src = $wp_scripts->base_url . $src;
1154      }
1155  
1156      return _load_script_textdomain_from_src( $handle, $src, $domain, $path, false );
1157  }
1158  
1159  /**
1160   * Loads the translation data for a given script module ID and text domain.
1161   *
1162   * Works like {@see load_script_textdomain()} but for script modules registered
1163   * via {@see wp_register_script_module()}.
1164   *
1165   * @since 7.0.0
1166   *
1167   * @param string $id     The script module identifier.
1168   * @param string $domain Optional. Text domain. Default 'default'.
1169   * @param string $path   Optional. The full file path to the directory containing translation files.
1170   * @return string|false The JSON-encoded translated strings for the given script module and text domain.
1171   *                      False if there are none.
1172   */
1173  function load_script_module_textdomain( string $id, string $domain = 'default', string $path = '' ) {
1174      $module = wp_script_modules()->get_registered( $id );
1175      if ( null === $module ) {
1176          return false;
1177      }
1178      $src = $module['src'];
1179  
1180      // Ensure src is an absolute URL for path resolution.
1181      if ( ! preg_match( '|^(https?:)?//|', $src ) ) {
1182          $src = site_url( $src );
1183      }
1184  
1185      return _load_script_textdomain_from_src( $id, $src, $domain, $path, true );
1186  }
1187  
1188  /**
1189   * Resolves and loads the translation JSON file for a given script or script module source URL.
1190   *
1191   * This is a shared implementation used by {@see load_script_textdomain()} and
1192   * {@see load_script_module_textdomain()} to avoid duplicating the path
1193   * resolution and file lookup logic.
1194   *
1195   * @since 7.0.0
1196   * @access private
1197   *
1198   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1199   *
1200   * @param string $handle    Name of the script or script module identifier to register a translation domain to.
1201   * @param string $src       Absolute source URL of the script or script module.
1202   * @param string $domain    Text domain.
1203   * @param string $path      The full file path to the directory containing translation files,
1204   *                          or an empty string to use the default path from the text domain registry.
1205   * @param bool   $is_module Whether the source belongs to a script module (true) or a classic script (false).
1206   * @return string|false The JSON-encoded translated strings on success, false otherwise.
1207   */
1208  function _load_script_textdomain_from_src( string $handle, string $src, string $domain, string $path, bool $is_module ) {
1209      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
1210      global $wp_textdomain_registry;
1211  
1212      $locale = determine_locale();
1213  
1214      if ( ! $path ) {
1215          $path = $wp_textdomain_registry->get( $domain, $locale );
1216      }
1217  
1218      if ( $path ) {
1219          $path = untrailingslashit( $path );
1220      }
1221  
1222      // If a path was given and the handle file exists simply return it.
1223      $file_base       = 'default' === $domain ? $locale : $domain . '-' . $locale;
1224      $handle_filename = $file_base . '-' . $handle . '.json';
1225  
1226      if ( $path ) {
1227          $translations = load_script_translations( $path . '/' . $handle_filename, $handle, $domain );
1228  
1229          if ( $translations ) {
1230              return $translations;
1231          }
1232      }
1233  
1234      $relative       = false;
1235      $languages_path = WP_LANG_DIR;
1236  
1237      $src_url = wp_parse_url( $src );
1238      if ( ! $src_url ) {
1239          return load_script_translations( false, $handle, $domain );
1240      }
1241      $src_url['path'] ??= '';
1242  
1243      $content_url = wp_parse_url( content_url() );
1244      if ( ! $content_url ) {
1245          return load_script_translations( false, $handle, $domain );
1246      }
1247  
1248      $plugins_url = wp_parse_url( plugins_url() );
1249      $site_url    = wp_parse_url( site_url() );
1250      $theme_root  = get_theme_root();
1251  
1252      // If the host is the same or it's a relative URL.
1253      if (
1254          ( ! isset( $content_url['path'] ) || str_starts_with( $src_url['path'], $content_url['path'] ) ) &&
1255          ( ! isset( $src_url['host'] ) || ! isset( $content_url['host'] ) || $src_url['host'] === $content_url['host'] )
1256      ) {
1257          // Make the src relative the specific plugin or theme.
1258          if ( isset( $content_url['path'] ) ) {
1259              $relative = substr( $src_url['path'], strlen( $content_url['path'] ) );
1260          } else {
1261              $relative = $src_url['path'];
1262          }
1263          $relative = trim( $relative, '/' );
1264          $relative = explode( '/', $relative );
1265  
1266          /*
1267           * Ensure correct languages path when using a custom `WP_PLUGIN_DIR` / `WP_PLUGIN_URL` configuration,
1268           * a custom theme root, and/or using Multisite with subdirectories.
1269           * See https://core.trac.wordpress.org/ticket/60891 and https://core.trac.wordpress.org/ticket/62016.
1270           */
1271  
1272          $theme_dir = array_slice( explode( '/', $theme_root ), -1 );
1273          $dirname   = $theme_dir[0] === $relative[0] ? 'themes' : 'plugins';
1274  
1275          $languages_path = WP_LANG_DIR . '/' . $dirname;
1276  
1277          $relative = array_slice( $relative, 2 ); // Remove plugins/<plugin name> or themes/<theme name>.
1278          $relative = implode( '/', $relative );
1279      } elseif (
1280          ( ! isset( $plugins_url['path'] ) || str_starts_with( $src_url['path'], $plugins_url['path'] ) ) &&
1281          ( ! isset( $src_url['host'] ) || ! isset( $plugins_url['host'] ) || $src_url['host'] === $plugins_url['host'] )
1282      ) {
1283          // Make the src relative the specific plugin.
1284          if ( isset( $plugins_url['path'] ) ) {
1285              $relative = substr( $src_url['path'], strlen( $plugins_url['path'] ) );
1286          } else {
1287              $relative = $src_url['path'];
1288          }
1289          $relative = trim( $relative, '/' );
1290          $relative = explode( '/', $relative );
1291  
1292          $languages_path = WP_LANG_DIR . '/plugins';
1293  
1294          $relative = array_slice( $relative, 1 ); // Remove <plugin name>.
1295          $relative = implode( '/', $relative );
1296      } elseif ( ! isset( $src_url['host'] ) || ! isset( $site_url['host'] ) || $src_url['host'] === $site_url['host'] ) {
1297          if ( ! isset( $site_url['path'] ) ) {
1298              $relative = trim( $src_url['path'], '/' );
1299          } elseif ( str_starts_with( $src_url['path'], trailingslashit( $site_url['path'] ) ) ) {
1300              // Make the src relative to the WP root.
1301              $relative = substr( $src_url['path'], strlen( $site_url['path'] ) );
1302              $relative = trim( $relative, '/' );
1303          }
1304      }
1305  
1306      /**
1307       * Filters the relative path of scripts used for finding translation files.
1308       *
1309       * @since 5.0.2
1310       * @since 7.0.0 The `$is_module` parameter was added.
1311       *
1312       * @param string|false $relative  The relative path of the script. False if it could not be determined.
1313       * @param string       $src       The full source URL of the script.
1314       * @param bool         $is_module Whether the source belongs to a script module (true) or a classic script (false).
1315       */
1316      $relative = apply_filters( 'load_script_textdomain_relative_path', $relative, $src, $is_module );
1317  
1318      // If the source is not from WP.
1319      if ( ! is_string( $relative ) ) {
1320          return load_script_translations( false, $handle, $domain );
1321      }
1322  
1323      // Translations are always based on the unminified filename.
1324      if ( str_ends_with( $relative, '.min.js' ) ) {
1325          $relative = substr( $relative, 0, -7 ) . '.js';
1326      }
1327  
1328      $md5_filename = $file_base . '-' . md5( $relative ) . '.json';
1329  
1330      if ( $path ) {
1331          $translations = load_script_translations( $path . '/' . $md5_filename, $handle, $domain );
1332  
1333          if ( $translations ) {
1334              return $translations;
1335          }
1336      }
1337  
1338      $translations = load_script_translations( $languages_path . '/' . $md5_filename, $handle, $domain );
1339  
1340      if ( $translations ) {
1341          return $translations;
1342      }
1343  
1344      return load_script_translations( false, $handle, $domain );
1345  }
1346  
1347  /**
1348   * Loads the translation data for the given script handle and text domain.
1349   *
1350   * @since 5.0.2
1351   *
1352   * @param string|false $file   Path to the translation file to load. False if there isn't one.
1353   * @param string       $handle Name of the script to register a translation domain to.
1354   * @param string       $domain The text domain.
1355   * @return string|false The JSON-encoded translated strings for the given script handle and text domain.
1356   *                      False if there are none.
1357   */
1358  function load_script_translations( $file, $handle, $domain ) {
1359      /**
1360       * Pre-filters script translations for the given file, script handle and text domain.
1361       *
1362       * Returning a non-null value allows to override the default logic, effectively short-circuiting the function.
1363       *
1364       * @since 5.0.2
1365       *
1366       * @param string|false|null $translations JSON-encoded translation data. Default null.
1367       * @param string|false      $file         Path to the translation file to load. False if there isn't one.
1368       * @param string            $handle       Name of the script to register a translation domain to.
1369       * @param string            $domain       The text domain.
1370       */
1371      $translations = apply_filters( 'pre_load_script_translations', null, $file, $handle, $domain );
1372  
1373      if ( null !== $translations ) {
1374          return $translations;
1375      }
1376  
1377      /**
1378       * Filters the file path for loading script translations for the given script handle and text domain.
1379       *
1380       * @since 5.0.2
1381       *
1382       * @param string|false $file   Path to the translation file to load. False if there isn't one.
1383       * @param string       $handle Name of the script to register a translation domain to.
1384       * @param string       $domain The text domain.
1385       */
1386      $file = apply_filters( 'load_script_translation_file', $file, $handle, $domain );
1387  
1388      if ( ! $file || ! is_readable( $file ) ) {
1389          return false;
1390      }
1391  
1392      $translations = file_get_contents( $file );
1393  
1394      /**
1395       * Filters script translations for the given file, script handle and text domain.
1396       *
1397       * @since 5.0.2
1398       *
1399       * @param string $translations JSON-encoded translation data.
1400       * @param string $file         Path to the translation file that was loaded.
1401       * @param string $handle       Name of the script to register a translation domain to.
1402       * @param string $domain       The text domain.
1403       */
1404      return apply_filters( 'load_script_translations', $translations, $file, $handle, $domain );
1405  }
1406  
1407  /**
1408   * Loads plugin and theme text domains just-in-time.
1409   *
1410   * When a textdomain is encountered for the first time, we try to load
1411   * the translation file from `wp-content/languages`, removing the need
1412   * to call load_plugin_textdomain() or load_theme_textdomain().
1413   *
1414   * @since 4.6.0
1415   * @access private
1416   *
1417   * @global MO[]                   $l10n_unloaded          An array of all text domains that have been unloaded again.
1418   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1419   *
1420   * @param string $domain Text domain. Unique identifier for retrieving translated strings.
1421   * @return bool True when the textdomain is successfully loaded, false otherwise.
1422   */
1423  function _load_textdomain_just_in_time( $domain ) {
1424      /** @var WP_Textdomain_Registry $wp_textdomain_registry */
1425      global $l10n_unloaded, $wp_textdomain_registry;
1426  
1427      $l10n_unloaded = (array) $l10n_unloaded;
1428  
1429      // Short-circuit if domain is 'default' which is reserved for core.
1430      if ( 'default' === $domain || isset( $l10n_unloaded[ $domain ] ) ) {
1431          return false;
1432      }
1433  
1434      if ( ! $wp_textdomain_registry->has( $domain ) ) {
1435          return false;
1436      }
1437  
1438      $locale = determine_locale();
1439      $path   = $wp_textdomain_registry->get( $domain, $locale );
1440      if ( ! $path ) {
1441          return false;
1442      }
1443  
1444      if ( ! doing_action( 'after_setup_theme' ) && ! did_action( 'after_setup_theme' ) ) {
1445          _doing_it_wrong(
1446              __FUNCTION__,
1447              sprintf(
1448                  /* translators: 1: The text domain. 2: 'init'. */
1449                  __( 'Translation loading for the %1$s domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the %2$s action or later.' ),
1450                  '<code>' . $domain . '</code>',
1451                  '<code>init</code>'
1452              ),
1453              '6.7.0'
1454          );
1455      }
1456  
1457      // Themes with their language directory outside of WP_LANG_DIR have a different file name.
1458      $template_directory   = trailingslashit( get_template_directory() );
1459      $stylesheet_directory = trailingslashit( get_stylesheet_directory() );
1460      if ( str_starts_with( $path, $template_directory ) || str_starts_with( $path, $stylesheet_directory ) ) {
1461          $mofile = "{$path}{$locale}.mo";
1462      } else {
1463          $mofile = "{$path}{$domain}-{$locale}.mo";
1464      }
1465  
1466      return load_textdomain( $domain, $mofile, $locale );
1467  }
1468  
1469  /**
1470   * Returns the Translations instance for a text domain.
1471   *
1472   * If there isn't one, returns empty Translations instance.
1473   *
1474   * @since 2.8.0
1475   *
1476   * @global MO[] $l10n An array of all currently loaded text domains.
1477   *
1478   * @param string $domain Text domain. Unique identifier for retrieving translated strings.
1479   * @return Translations|NOOP_Translations A Translations instance.
1480   */
1481  function get_translations_for_domain( $domain ) {
1482      global $l10n;
1483      if ( isset( $l10n[ $domain ] ) || ( _load_textdomain_just_in_time( $domain ) && isset( $l10n[ $domain ] ) ) ) {
1484          return $l10n[ $domain ];
1485      }
1486  
1487      static $noop_translations = null;
1488      if ( null === $noop_translations ) {
1489          $noop_translations = new NOOP_Translations();
1490      }
1491  
1492      $l10n[ $domain ] = &$noop_translations;
1493  
1494      return $noop_translations;
1495  }
1496  
1497  /**
1498   * Determines whether there are translations for the text domain.
1499   *
1500   * @since 3.0.0
1501   *
1502   * @global MO[] $l10n An array of all currently loaded text domains.
1503   *
1504   * @param string $domain Text domain. Unique identifier for retrieving translated strings.
1505   * @return bool Whether there are translations.
1506   */
1507  function is_textdomain_loaded( $domain ) {
1508      global $l10n;
1509      return isset( $l10n[ $domain ] ) && ! $l10n[ $domain ] instanceof NOOP_Translations;
1510  }
1511  
1512  /**
1513   * Translates role name.
1514   *
1515   * Since the role names are in the database and not in the source there
1516   * are dummy gettext calls to get them into the POT file and this function
1517   * properly translates them back.
1518   *
1519   * The before_last_bar() call is needed, because older installations keep the roles
1520   * using the old context format: 'Role name|User role' and just skipping the
1521   * content after the last bar is easier than fixing them in the DB. New installations
1522   * won't suffer from that problem.
1523   *
1524   * @since 2.8.0
1525   * @since 5.2.0 Added the `$domain` parameter.
1526   *
1527   * @param string $name   The role name.
1528   * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
1529   *                       Default 'default'.
1530   * @return string Translated role name on success, original name on failure.
1531   */
1532  function translate_user_role( $name, $domain = 'default' ) {
1533      return translate_with_gettext_context( before_last_bar( $name ), 'User role', $domain );
1534  }
1535  
1536  /**
1537   * Gets all available languages based on the presence of *.mo and *.l10n.php files in a given directory.
1538   *
1539   * The default directory is WP_LANG_DIR.
1540   *
1541   * @since 3.0.0
1542   * @since 4.7.0 The results are now filterable with the {@see 'get_available_languages'} filter.
1543   * @since 6.5.0 The initial file list is now cached and also takes into account *.l10n.php files.
1544   *
1545   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1546   *
1547   * @param string $dir A directory to search for language files.
1548   *                    Default WP_LANG_DIR.
1549   * @return string[] An array of language codes or an empty array if no languages are present.
1550   *                  Language codes are formed by stripping the file extension from the language file names.
1551   */
1552  function get_available_languages( $dir = null ) {
1553      global $wp_textdomain_registry;
1554  
1555      $languages = array();
1556  
1557      $path       = $dir ?? WP_LANG_DIR;
1558      $lang_files = $wp_textdomain_registry->get_language_files_from_path( $path );
1559  
1560      if ( $lang_files ) {
1561          foreach ( $lang_files as $lang_file ) {
1562              $lang_file = basename( $lang_file, '.mo' );
1563              $lang_file = basename( $lang_file, '.l10n.php' );
1564  
1565              if ( ! str_starts_with( $lang_file, 'continents-cities' ) && ! str_starts_with( $lang_file, 'ms-' ) &&
1566                  ! str_starts_with( $lang_file, 'admin-' ) ) {
1567                  $languages[] = $lang_file;
1568              }
1569          }
1570      }
1571  
1572      /**
1573       * Filters the list of available language codes.
1574       *
1575       * @since 4.7.0
1576       *
1577       * @param string[] $languages An array of available language codes.
1578       * @param string   $dir       The directory where the language files were found.
1579       */
1580      return apply_filters( 'get_available_languages', array_unique( $languages ), $dir );
1581  }
1582  
1583  /**
1584   * Gets installed translations.
1585   *
1586   * Looks in the wp-content/languages directory for translations of
1587   * plugins or themes.
1588   *
1589   * @since 3.7.0
1590   *
1591   * @global WP_Textdomain_Registry $wp_textdomain_registry WordPress Textdomain Registry.
1592   *
1593   * @param string $type What to search for. Accepts 'plugins', 'themes', 'core'.
1594   * @return array Array of language data.
1595   */
1596  function wp_get_installed_translations( $type ) {
1597      global $wp_textdomain_registry;
1598  
1599      if ( 'themes' !== $type && 'plugins' !== $type && 'core' !== $type ) {
1600          return array();
1601      }
1602  
1603      $dir = 'core' === $type ? WP_LANG_DIR : WP_LANG_DIR . "/$type";
1604  
1605      if ( ! is_dir( $dir ) ) {
1606          return array();
1607      }
1608  
1609      $files = $wp_textdomain_registry->get_language_files_from_path( $dir );
1610      if ( ! $files ) {
1611          return array();
1612      }
1613  
1614      $language_data = array();
1615  
1616      foreach ( $files as $file ) {
1617          if ( ! preg_match( '/(?:(.+)-)?([a-z]{2,3}(?:_[A-Z]{2})?(?:_[a-z0-9]+)?)\.(?:mo|l10n\.php)/', basename( $file ), $match ) ) {
1618              continue;
1619          }
1620  
1621          list( , $textdomain, $language ) = $match;
1622          if ( '' === $textdomain ) {
1623              $textdomain = 'default';
1624          }
1625  
1626          if ( str_ends_with( $file, '.mo' ) ) {
1627              $pofile = substr_replace( $file, '.po', - strlen( '.mo' ) );
1628  
1629              if ( ! file_exists( $pofile ) ) {
1630                  continue;
1631              }
1632  
1633              $language_data[ $textdomain ][ $language ] = wp_get_pomo_file_data( $pofile );
1634          } else {
1635              $pofile = substr_replace( $file, '.po', - strlen( '.l10n.php' ) );
1636  
1637              // If both a PO and a PHP file exist, prefer the PO file.
1638              if ( file_exists( $pofile ) ) {
1639                  continue;
1640              }
1641  
1642              $language_data[ $textdomain ][ $language ] = wp_get_l10n_php_file_data( $file );
1643          }
1644      }
1645      return $language_data;
1646  }
1647  
1648  /**
1649   * Extracts headers from a PO file.
1650   *
1651   * @since 3.7.0
1652   *
1653   * @param string $po_file Path to PO file.
1654   * @return string[] Array of PO file header values keyed by header name.
1655   */
1656  function wp_get_pomo_file_data( $po_file ) {
1657      $headers = get_file_data(
1658          $po_file,
1659          array(
1660              'POT-Creation-Date'  => '"POT-Creation-Date',
1661              'PO-Revision-Date'   => '"PO-Revision-Date',
1662              'Project-Id-Version' => '"Project-Id-Version',
1663              'X-Generator'        => '"X-Generator',
1664          )
1665      );
1666      foreach ( $headers as $header => $value ) {
1667          // Remove possible contextual '\n' and closing double quote.
1668          $headers[ $header ] = preg_replace( '~(\\\n)?"$~', '', $value );
1669      }
1670      return $headers;
1671  }
1672  
1673  /**
1674   * Extracts headers from a PHP translation file.
1675   *
1676   * @since 6.6.0
1677   *
1678   * @param string $php_file Path to a `.l10n.php` file.
1679   * @return string[] Array of file header values keyed by header name.
1680   */
1681  function wp_get_l10n_php_file_data( $php_file ) {
1682      $data = (array) include $php_file;
1683  
1684      unset( $data['messages'] );
1685      $headers = array(
1686          'POT-Creation-Date'  => 'pot-creation-date',
1687          'PO-Revision-Date'   => 'po-revision-date',
1688          'Project-Id-Version' => 'project-id-version',
1689          'X-Generator'        => 'x-generator',
1690      );
1691  
1692      $result = array(
1693          'POT-Creation-Date'  => '',
1694          'PO-Revision-Date'   => '',
1695          'Project-Id-Version' => '',
1696          'X-Generator'        => '',
1697      );
1698  
1699      foreach ( $headers as $po_header => $php_header ) {
1700          if ( isset( $data[ $php_header ] ) ) {
1701              $result[ $po_header ] = $data[ $php_header ];
1702          }
1703      }
1704  
1705      return $result;
1706  }
1707  
1708  /**
1709   * Displays or returns a Language selector.
1710   *
1711   * @since 4.0.0
1712   * @since 4.3.0 Introduced the `echo` argument.
1713   * @since 4.7.0 Introduced the `show_option_site_default` argument.
1714   * @since 5.1.0 Introduced the `show_option_en_us` argument.
1715   * @since 5.9.0 Introduced the `explicit_option_en_us` argument.
1716   *
1717   * @see get_available_languages()
1718   * @see wp_get_available_translations()
1719   *
1720   * @param string|array $args {
1721   *     Optional. Array or string of arguments for outputting the language selector.
1722   *
1723   *     @type string   $id                           ID attribute of the select element. Default 'locale'.
1724   *     @type string   $name                         Name attribute of the select element. Default 'locale'.
1725   *     @type string[] $languages                    List of installed languages, contain only the locales.
1726   *                                                  Default empty array.
1727   *     @type array    $translations                 List of available translations. Default result of
1728   *                                                  wp_get_available_translations().
1729   *     @type string   $selected                     Language which should be selected. Default empty.
1730   *     @type bool|int $echo                         Whether to echo the generated markup. Accepts 0, 1, or their
1731   *                                                  boolean equivalents. Default 1.
1732   *     @type bool     $show_available_translations  Whether to show available translations. Default true.
1733   *     @type bool     $show_option_site_default     Whether to show an option to fall back to the site's locale. Default false.
1734   *     @type bool     $show_option_en_us            Whether to show an option for English (United States). Default true.
1735   *     @type bool     $explicit_option_en_us        Whether the English (United States) option uses an explicit value of en_US
1736   *                                                  instead of an empty value. Default false.
1737   * }
1738   * @return string HTML dropdown list of languages.
1739   */
1740  function wp_dropdown_languages( $args = array() ) {
1741  
1742      $parsed_args = wp_parse_args(
1743          $args,
1744          array(
1745              'id'                          => 'locale',
1746              'name'                        => 'locale',
1747              'languages'                   => array(),
1748              'translations'                => array(),
1749              'selected'                    => '',
1750              'echo'                        => 1,
1751              'show_available_translations' => true,
1752              'show_option_site_default'    => false,
1753              'show_option_en_us'           => true,
1754              'explicit_option_en_us'       => false,
1755          )
1756      );
1757  
1758      // Bail if no ID or no name.
1759      if ( ! $parsed_args['id'] || ! $parsed_args['name'] ) {
1760          return;
1761      }
1762  
1763      // English (United States) uses an empty string for the value attribute.
1764      if ( 'en_US' === $parsed_args['selected'] && ! $parsed_args['explicit_option_en_us'] ) {
1765          $parsed_args['selected'] = '';
1766      }
1767  
1768      $translations = $parsed_args['translations'];
1769      if ( empty( $translations ) ) {
1770          require_once  ABSPATH . 'wp-admin/includes/translation-install.php';
1771          $translations = wp_get_available_translations();
1772      }
1773  
1774      /*
1775       * $parsed_args['languages'] should only contain the locales. Find the locale in
1776       * $translations to get the native name. Fall back to locale.
1777       */
1778      $languages = array();
1779      foreach ( $parsed_args['languages'] as $locale ) {
1780          if ( isset( $translations[ $locale ] ) ) {
1781              $translation = $translations[ $locale ];
1782              $languages[] = array(
1783                  'language'    => $translation['language'],
1784                  'native_name' => $translation['native_name'],
1785                  'lang'        => current( $translation['iso'] ),
1786              );
1787  
1788              // Remove installed language from available translations.
1789              unset( $translations[ $locale ] );
1790          } else {
1791              $languages[] = array(
1792                  'language'    => $locale,
1793                  'native_name' => $locale,
1794                  'lang'        => '',
1795              );
1796          }
1797      }
1798  
1799      $translations_available = ( ! empty( $translations ) && $parsed_args['show_available_translations'] );
1800  
1801      // Holds the HTML markup.
1802      $structure = array();
1803  
1804      // List installed languages.
1805      if ( $translations_available ) {
1806          $structure[] = '<optgroup label="' . esc_attr_x( 'Installed', 'translations' ) . '">';
1807      }
1808  
1809      // Site default.
1810      if ( $parsed_args['show_option_site_default'] ) {
1811          $structure[] = sprintf(
1812              '<option value="site-default" data-installed="1"%s>%s</option>',
1813              selected( 'site-default', $parsed_args['selected'], false ),
1814              _x( 'Site Default', 'default site language' )
1815          );
1816      }
1817  
1818      if ( $parsed_args['show_option_en_us'] ) {
1819          $value       = ( $parsed_args['explicit_option_en_us'] ) ? 'en_US' : '';
1820          $structure[] = sprintf(
1821              '<option value="%s" lang="en" data-installed="1"%s>English (United States)</option>',
1822              esc_attr( $value ),
1823              selected( '', $parsed_args['selected'], false )
1824          );
1825      }
1826  
1827      // List installed languages.
1828      foreach ( $languages as $language ) {
1829          $structure[] = sprintf(
1830              '<option value="%s" lang="%s"%s data-installed="1">%s</option>',
1831              esc_attr( $language['language'] ),
1832              esc_attr( $language['lang'] ),
1833              selected( $language['language'], $parsed_args['selected'], false ),
1834              esc_html( $language['native_name'] )
1835          );
1836      }
1837      if ( $translations_available ) {
1838          $structure[] = '</optgroup>';
1839      }
1840  
1841      // List available translations.
1842      if ( $translations_available ) {
1843          $structure[] = '<optgroup label="' . esc_attr_x( 'Available', 'translations' ) . '">';
1844          foreach ( $translations as $translation ) {
1845              $structure[] = sprintf(
1846                  '<option value="%s" lang="%s"%s>%s</option>',
1847                  esc_attr( $translation['language'] ),
1848                  esc_attr( current( $translation['iso'] ) ),
1849                  selected( $translation['language'], $parsed_args['selected'], false ),
1850                  esc_html( $translation['native_name'] )
1851              );
1852          }
1853          $structure[] = '</optgroup>';
1854      }
1855  
1856      // Combine the output string.
1857      $output  = sprintf( '<select name="%s" id="%s">', esc_attr( $parsed_args['name'] ), esc_attr( $parsed_args['id'] ) );
1858      $output .= implode( "\n", $structure );
1859      $output .= '</select>';
1860  
1861      if ( $parsed_args['echo'] ) {
1862          echo $output;
1863      }
1864  
1865      return $output;
1866  }
1867  
1868  /**
1869   * Determines whether the current locale is right-to-left (RTL).
1870   *
1871   * For more information on this and similar theme functions, check out
1872   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1873   * Conditional Tags} article in the Theme Developer Handbook.
1874   *
1875   * @since 3.0.0
1876   *
1877   * @global WP_Locale $wp_locale WordPress date and time locale object.
1878   *
1879   * @return bool Whether locale is RTL.
1880   */
1881  function is_rtl() {
1882      global $wp_locale;
1883      if ( ! ( $wp_locale instanceof WP_Locale ) ) {
1884          return false;
1885      }
1886      return $wp_locale->is_rtl();
1887  }
1888  
1889  /**
1890   * Switches the translations according to the given locale.
1891   *
1892   * @since 4.7.0
1893   *
1894   * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
1895   *
1896   * @param string $locale The locale.
1897   * @return bool True on success, false on failure.
1898   */
1899  function switch_to_locale( $locale ) {
1900      /* @var WP_Locale_Switcher $wp_locale_switcher */
1901      global $wp_locale_switcher;
1902  
1903      if ( ! $wp_locale_switcher ) {
1904          return false;
1905      }
1906  
1907      return $wp_locale_switcher->switch_to_locale( $locale );
1908  }
1909  
1910  /**
1911   * Switches the translations according to the given user's locale.
1912   *
1913   * @since 6.2.0
1914   *
1915   * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
1916   *
1917   * @param int $user_id User ID.
1918   * @return bool True on success, false on failure.
1919   */
1920  function switch_to_user_locale( $user_id ) {
1921      /* @var WP_Locale_Switcher $wp_locale_switcher */
1922      global $wp_locale_switcher;
1923  
1924      if ( ! $wp_locale_switcher ) {
1925          return false;
1926      }
1927  
1928      return $wp_locale_switcher->switch_to_user_locale( $user_id );
1929  }
1930  
1931  /**
1932   * Restores the translations according to the previous locale.
1933   *
1934   * @since 4.7.0
1935   *
1936   * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
1937   *
1938   * @return string|false Locale on success, false on error.
1939   */
1940  function restore_previous_locale() {
1941      /* @var WP_Locale_Switcher $wp_locale_switcher */
1942      global $wp_locale_switcher;
1943  
1944      if ( ! $wp_locale_switcher ) {
1945          return false;
1946      }
1947  
1948      return $wp_locale_switcher->restore_previous_locale();
1949  }
1950  
1951  /**
1952   * Restores the translations according to the original locale.
1953   *
1954   * @since 4.7.0
1955   *
1956   * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
1957   *
1958   * @return string|false Locale on success, false on error.
1959   */
1960  function restore_current_locale() {
1961      /* @var WP_Locale_Switcher $wp_locale_switcher */
1962      global $wp_locale_switcher;
1963  
1964      if ( ! $wp_locale_switcher ) {
1965          return false;
1966      }
1967  
1968      return $wp_locale_switcher->restore_current_locale();
1969  }
1970  
1971  /**
1972   * Determines whether switch_to_locale() is in effect.
1973   *
1974   * @since 4.7.0
1975   *
1976   * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object.
1977   *
1978   * @return bool True if the locale has been switched, false otherwise.
1979   */
1980  function is_locale_switched() {
1981      /* @var WP_Locale_Switcher $wp_locale_switcher */
1982      global $wp_locale_switcher;
1983  
1984      return $wp_locale_switcher->is_switched();
1985  }
1986  
1987  /**
1988   * Translates the provided settings value using its i18n schema.
1989   *
1990   * @since 5.9.0
1991   * @access private
1992   *
1993   * @param string|string[]|array[]|object $i18n_schema I18n schema for the setting.
1994   * @param string|string[]|array[]        $settings    Value for the settings.
1995   * @param string                         $textdomain  Textdomain to use with translations.
1996   *
1997   * @return string|string[]|array[] Translated settings.
1998   */
1999  function translate_settings_using_i18n_schema( $i18n_schema, $settings, $textdomain ) {
2000      if ( empty( $i18n_schema ) || empty( $settings ) || empty( $textdomain ) ) {
2001          return $settings;
2002      }
2003  
2004      if ( is_string( $i18n_schema ) && is_string( $settings ) ) {
2005          return translate_with_gettext_context( $settings, $i18n_schema, $textdomain );
2006      }
2007      if ( is_array( $i18n_schema ) && is_array( $settings ) ) {
2008          $translated_settings = array();
2009          foreach ( $settings as $value ) {
2010              $translated_settings[] = translate_settings_using_i18n_schema( $i18n_schema[0], $value, $textdomain );
2011          }
2012          return $translated_settings;
2013      }
2014      if ( is_object( $i18n_schema ) && is_array( $settings ) ) {
2015          $group_key           = '*';
2016          $translated_settings = array();
2017          foreach ( $settings as $key => $value ) {
2018              if ( isset( $i18n_schema->$key ) ) {
2019                  $translated_settings[ $key ] = translate_settings_using_i18n_schema( $i18n_schema->$key, $value, $textdomain );
2020              } elseif ( isset( $i18n_schema->$group_key ) ) {
2021                  $translated_settings[ $key ] = translate_settings_using_i18n_schema( $i18n_schema->$group_key, $value, $textdomain );
2022              } else {
2023                  $translated_settings[ $key ] = $value;
2024              }
2025          }
2026          return $translated_settings;
2027      }
2028      return $settings;
2029  }
2030  
2031  /**
2032   * Retrieves the list item separator based on the locale.
2033   *
2034   * @since 6.0.0
2035   *
2036   * @global WP_Locale $wp_locale WordPress date and time locale object.
2037   *
2038   * @return string Locale-specific list item separator.
2039   */
2040  function wp_get_list_item_separator() {
2041      global $wp_locale;
2042  
2043      if ( ! ( $wp_locale instanceof WP_Locale ) ) {
2044          // Default value of WP_Locale::get_list_item_separator().
2045          /* translators: Used between list items, there is a space after the comma. */
2046          return __( ', ' );
2047      }
2048  
2049      return $wp_locale->get_list_item_separator();
2050  }
2051  
2052  /**
2053   * Retrieves the word count type based on the locale.
2054   *
2055   * @since 6.2.0
2056   *
2057   * @global WP_Locale $wp_locale WordPress date and time locale object.
2058   *
2059   * @return string Locale-specific word count type. Possible values are `characters_excluding_spaces`,
2060   *                `characters_including_spaces`, or `words`. Defaults to `words`.
2061   */
2062  function wp_get_word_count_type() {
2063      global $wp_locale;
2064  
2065      if ( ! ( $wp_locale instanceof WP_Locale ) ) {
2066          // Default value of WP_Locale::get_word_count_type().
2067          return 'words';
2068      }
2069  
2070      return $wp_locale->get_word_count_type();
2071  }
2072  
2073  /**
2074   * Returns a boolean to indicate whether a translation exists for a given string with optional text domain and locale.
2075   *
2076   * @since 6.7.0
2077   *
2078   * @param string  $singular   Singular translation to check.
2079   * @param string  $textdomain Optional. Text domain. Default 'default'.
2080   * @param ?string $locale     Optional. Locale. Default current locale.
2081   * @return bool  True if the translation exists, false otherwise.
2082   */
2083  function has_translation( string $singular, string $textdomain = 'default', ?string $locale = null ): bool {
2084      return WP_Translation_Controller::get_instance()->has_translation( $singular, $textdomain, $locale );
2085  }


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