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assets
block-bindings
block-patterns
block-supports
blocks
certificates
css
customize
fonts
html-api
images
interactivity-api
js
l10n
php-compat
pomo
rest-api
sitemaps
sodium_compat
style-engine
theme-compat
widgets
Files:
admin-bar.php
atomlib.php
author-template.php
block-bindings.php
block-editor.php
block-patterns.php
block-template-utils.php
block-template.php
blocks.php
bookmark-template.php
bookmark.php
cache-compat.php
cache.php
canonical.php
capabilities.php
category-template.php
category.php
class-IXR.php
class-avif-info.php
class-feed.php
class-http.php
class-json.php
class-oembed.php
class-phpass.php
class-phpmailer.php
class-pop3.php
class-requests.php
class-simplepie.php
class-smtp.php
class-snoopy.php
class-walker-category-dropdown.php
class-walker-category.php
class-walker-comment.php
class-walker-nav-menu.php
class-walker-page-dropdown.php
class-walker-page.php
class-wp-admin-bar.php
class-wp-ajax-response.php
class-wp-application-passwords.php
class-wp-block-bindings-registry.php
class-wp-block-bindings-source.php
class-wp-block-editor-context.php
class-wp-block-list.php
class-wp-block-parser-block.php
class-wp-block-parser-frame.php
class-wp-block-parser.php
class-wp-block-pattern-categories-registry.php
class-wp-block-patterns-registry.php
class-wp-block-styles-registry.php
class-wp-block-supports.php
class-wp-block-template.php
class-wp-block-type-registry.php
class-wp-block-type.php
class-wp-block.php
class-wp-classic-to-block-menu-converter.php
class-wp-comment-query.php
class-wp-comment.php
class-wp-customize-control.php
class-wp-customize-manager.php
class-wp-customize-nav-menus.php
class-wp-customize-panel.php
class-wp-customize-section.php
class-wp-customize-setting.php
class-wp-customize-widgets.php
class-wp-date-query.php
class-wp-dependencies.php
class-wp-dependency.php
class-wp-duotone.php
class-wp-editor.php
class-wp-embed.php
class-wp-error.php
class-wp-fatal-error-handler.php
class-wp-feed-cache-transient.php
class-wp-feed-cache.php
class-wp-hook.php
class-wp-http-cookie.php
class-wp-http-curl.php
class-wp-http-encoding.php
class-wp-http-ixr-client.php
class-wp-http-proxy.php
class-wp-http-requests-hooks.php
class-wp-http-requests-response.php
class-wp-http-response.php
class-wp-http-streams.php
class-wp-http.php
class-wp-image-editor-gd.php
class-wp-image-editor-imagick.php
class-wp-image-editor.php
class-wp-list-util.php
class-wp-locale-switcher.php
class-wp-locale.php
class-wp-matchesmapregex.php
class-wp-meta-query.php
class-wp-metadata-lazyloader.php
class-wp-navigation-fallback.php
class-wp-network-query.php
class-wp-network.php
class-wp-object-cache.php
class-wp-oembed-controller.php
class-wp-oembed.php
class-wp-paused-extensions-storage.php
class-wp-plugin-dependencies.php
class-wp-post-type.php
class-wp-post.php
class-wp-query.php
class-wp-recovery-mode-cookie-service.php
class-wp-recovery-mode-email-service.php
class-wp-recovery-mode-key-service.php
class-wp-recovery-mode-link-service.php
class-wp-recovery-mode.php
class-wp-rewrite.php
class-wp-role.php
class-wp-roles.php
class-wp-script-modules.php
class-wp-scripts.php
class-wp-session-tokens.php
class-wp-simplepie-file.php
class-wp-simplepie-sanitize-kses.php
class-wp-site-query.php
class-wp-site.php
class-wp-styles.php
class-wp-tax-query.php
class-wp-taxonomy.php
class-wp-term-query.php
class-wp-term.php
class-wp-text-diff-renderer-inline.php
class-wp-text-diff-renderer-table.php
class-wp-textdomain-registry.php
class-wp-theme-json-data.php
class-wp-theme-json-resolver.php
class-wp-theme-json-schema.php
class-wp-theme-json.php
class-wp-theme.php
class-wp-token-map.php
class-wp-user-meta-session-tokens.php
class-wp-user-query.php
class-wp-user-request.php
class-wp-user.php
class-wp-walker.php
class-wp-widget-factory.php
class-wp-widget.php
class-wp-xmlrpc-server.php
class-wp.php
class-wpdb.php
class.wp-dependencies.php
class.wp-scripts.php
class.wp-styles.php
comment-template.php
comment.php
compat.php
cron.php
date.php
default-constants.php
default-filters.php
default-widgets.php
deprecated.php
embed-template.php
embed.php
error-protection.php
feed-atom-comments.php
feed-atom.php
feed-rdf.php
feed-rss.php
feed-rss2-comments.php
feed-rss2.php
feed.php
fonts.php
formatting.php
functions.php
functions.wp-scripts.php
functions.wp-styles.php
general-template.php
global-styles-and-settings.php
http.php
https-detection.php
https-migration.php
kses.php
l10n.php
link-template.php
load.php
locale.php
media-template.php
media.php
meta.php
ms-blogs.php
ms-default-constants.php
ms-default-filters.php
ms-deprecated.php
ms-files.php
ms-functions.php
ms-load.php
ms-network.php
ms-settings.php
ms-site.php
nav-menu-template.php
nav-menu.php
option.php
pluggable-deprecated.php
pluggable.php
plugin.php
post-formats.php
post-template.php
post-thumbnail-template.php
post.php
query.php
registration-functions.php
registration.php
rest-api.php
revision.php
rewrite.php
robots-template.php
rss-functions.php
rss.php
script-loader.php
script-modules.php
session.php
shortcodes.php
sitemaps.php
spl-autoload-compat.php
style-engine.php
taxonomy.php
template-canvas.php
template-loader.php
template.php
theme-previews.php
theme-templates.php
theme.php
update.php
user.php
vars.php
version.php
widgets.php
wp-db.php
wp-diff.php
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Edit File: class-wp-locale-switcher.php
<?php /** * Locale API: WP_Locale_Switcher class * * @package WordPress * @subpackage i18n * @since 4.7.0 */ /** * Core class used for switching locales. * * @since 4.7.0 */ #[AllowDynamicProperties] class WP_Locale_Switcher { /** * Locale switching stack. * * @since 6.2.0 * @var array */ private $stack = array(); /** * Original locale. * * @since 4.7.0 * @var string */ private $original_locale; /** * Holds all available languages. * * @since 4.7.0 * @var string[] An array of language codes (file names without the .mo extension). */ private $available_languages; /** * Constructor. * * Stores the original locale as well as a list of all available languages. * * @since 4.7.0 */ public function __construct() { $this->original_locale = determine_locale(); $this->available_languages = array_merge( array( 'en_US' ), get_available_languages() ); } /** * Initializes the locale switcher. * * Hooks into the {@see 'locale'} and {@see 'determine_locale'} filters * to change the locale on the fly. * * @since 4.7.0 */ public function init() { add_filter( 'locale', array( $this, 'filter_locale' ) ); add_filter( 'determine_locale', array( $this, 'filter_locale' ) ); } /** * Switches the translations according to the given locale. * * @since 4.7.0 * * @param string $locale The locale to switch to. * @param int|false $user_id Optional. User ID as context. Default false. * @return bool True on success, false on failure. */ public function switch_to_locale( $locale, $user_id = false ) { $current_locale = determine_locale(); if ( $current_locale === $locale ) { return false; } if ( ! in_array( $locale, $this->available_languages, true ) ) { return false; } $this->stack[] = array( $locale, $user_id ); $this->change_locale( $locale ); /** * Fires when the locale is switched. * * @since 4.7.0 * @since 6.2.0 The `$user_id` parameter was added. * * @param string $locale The new locale. * @param false|int $user_id User ID for context if available. */ do_action( 'switch_locale', $locale, $user_id ); return true; } /** * Switches the translations according to the given user's locale. * * @since 6.2.0 * * @param int $user_id User ID. * @return bool True on success, false on failure. */ public function switch_to_user_locale( $user_id ) { $locale = get_user_locale( $user_id ); return $this->switch_to_locale( $locale, $user_id ); } /** * Restores the translations according to the previous locale. * * @since 4.7.0 * * @return string|false Locale on success, false on failure. */ public function restore_previous_locale() { $previous_locale = array_pop( $this->stack ); if ( null === $previous_locale ) { // The stack is empty, bail. return false; } $entry = end( $this->stack ); $locale = is_array( $entry ) ? $entry[0] : false; if ( ! $locale ) { // There's nothing left in the stack: go back to the original locale. $locale = $this->original_locale; } $this->change_locale( $locale ); /** * Fires when the locale is restored to the previous one. * * @since 4.7.0 * * @param string $locale The new locale. * @param string $previous_locale The previous locale. */ do_action( 'restore_previous_locale', $locale, $previous_locale[0] ); return $locale; } /** * Restores the translations according to the original locale. * * @since 4.7.0 * * @return string|false Locale on success, false on failure. */ public function restore_current_locale() { if ( empty( $this->stack ) ) { return false; } $this->stack = array( array( $this->original_locale, false ) ); return $this->restore_previous_locale(); } /** * Whether switch_to_locale() is in effect. * * @since 4.7.0 * * @return bool True if the locale has been switched, false otherwise. */ public function is_switched() { return ! empty( $this->stack ); } /** * Returns the locale currently switched to. * * @since 6.2.0 * * @return string|false Locale if the locale has been switched, false otherwise. */ public function get_switched_locale() { $entry = end( $this->stack ); if ( $entry ) { return $entry[0]; } return false; } /** * Returns the user ID related to the currently switched locale. * * @since 6.2.0 * * @return int|false User ID if set and if the locale has been switched, false otherwise. */ public function get_switched_user_id() { $entry = end( $this->stack ); if ( $entry ) { return $entry[1]; } return false; } /** * Filters the locale of the WordPress installation. * * @since 4.7.0 * * @param string $locale The locale of the WordPress installation. * @return string The locale currently being switched to. */ public function filter_locale( $locale ) { $switched_locale = $this->get_switched_locale(); if ( $switched_locale ) { return $switched_locale; } return $locale; } /** * Load translations for a given locale. * * When switching to a locale, translations for this locale must be loaded from scratch. * * @since 4.7.0 * * @global Mo[] $l10n An array of all currently loaded text domains. * * @param string $locale The locale to load translations for. */ private function load_translations( $locale ) { global $l10n; $domains = $l10n ? array_keys( $l10n ) : array(); load_default_textdomain( $locale ); foreach ( $domains as $domain ) { // The default text domain is handled by `load_default_textdomain()`. if ( 'default' === $domain ) { continue; } /* * Unload current text domain but allow them to be reloaded * after switching back or to another locale. */ unload_textdomain( $domain, true ); get_translations_for_domain( $domain ); } } /** * Changes the site's locale to the given one. * * Loads the translations, changes the global `$wp_locale` object and updates * all post type labels. * * @since 4.7.0 * * @global WP_Locale $wp_locale WordPress date and time locale object. * * @param string $locale The locale to change to. */ private function change_locale( $locale ) { global $wp_locale; $this->load_translations( $locale ); $wp_locale = new WP_Locale(); WP_Translation_Controller::get_instance()->set_locale( $locale ); /** * Fires when the locale is switched to or restored. * * @since 4.7.0 * * @param string $locale The new locale. */ do_action( 'change_locale', $locale ); } }
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