X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/7688c6ba71852cd89123b62b2d57683535e4702a..16e7b37c7914d753890c1a05a9335f3b43751eb8:/wp-includes/l10n.php

diff --git a/wp-includes/l10n.php b/wp-includes/l10n.php
index 4dba6798..20a18f96 100644
--- a/wp-includes/l10n.php
+++ b/wp-includes/l10n.php
@@ -1,110 +1,1326 @@
 <?php
+/**
+ * Core Translation API
+ *
+ * @package WordPress
+ * @subpackage i18n
+ * @since 1.2.0
+ */
+
+/**
+ * Retrieves the current locale.
+ *
+ * If the locale is set, then it will filter the locale in the {@see 'locale'}
+ * filter hook and return the value.
+ *
+ * If the locale is not set already, then the WPLANG constant is used if it is
+ * defined. Then it is filtered through the {@see 'locale'} filter hook and
+ * the value for the locale global set and the locale is returned.
+ *
+ * The process to get the locale should only be done once, but the locale will
+ * always be filtered using the {@see 'locale'} hook.
+ *
+ * @since 1.5.0
+ *
+ * @global string $locale
+ * @global string $wp_local_package
+ *
+ * @return string The locale of the blog or from the {@see 'locale'} hook.
+ */
 function get_locale() {
-	global $locale;
+	global $locale, $wp_local_package;
 
-	if (isset($locale))
+	if ( isset( $locale ) ) {
+		/**
+		 * Filters WordPress install's locale ID.
+		 *
+		 * @since 1.5.0
+		 *
+		 * @param string $locale The locale ID.
+		 */
 		return apply_filters( 'locale', $locale );
+	}
+
+	if ( isset( $wp_local_package ) ) {
+		$locale = $wp_local_package;
+	}
 
-	// WPLANG is defined in wp-config.
-	if (defined('WPLANG'))
+	// WPLANG was defined in wp-config.
+	if ( defined( 'WPLANG' ) ) {
 		$locale = WPLANG;
+	}
 
-	if (empty($locale))
-		$locale = '';
+	// If multisite, check options.
+	if ( is_multisite() ) {
+		// Don't check blog option when installing.
+		if ( wp_installing() || ( false === $ms_locale = get_option( 'WPLANG' ) ) ) {
+			$ms_locale = get_site_option( 'WPLANG' );
+		}
 
-	$locale = apply_filters('locale', $locale);
+		if ( $ms_locale !== false ) {
+			$locale = $ms_locale;
+		}
+	} else {
+		$db_locale = get_option( 'WPLANG' );
+		if ( $db_locale !== false ) {
+			$locale = $db_locale;
+		}
+	}
 
-	return $locale;
+	if ( empty( $locale ) ) {
+		$locale = 'en_US';
+	}
+
+	/** This filter is documented in wp-includes/l10n.php */
+	return apply_filters( 'locale', $locale );
 }
 
-function translate($text, $domain) {
-	global $l10n;
+/**
+ * Retrieves the locale of a user.
+ *
+ * If the user has a locale set to a non-empty string then it will be
+ * returned. Otherwise it returns the locale of get_locale().
+ *
+ * @since 4.7.0
+ *
+ * @param int|WP_User $user_id User's ID or a WP_User object. Defaults to current user.
+ * @return string The locale of the user.
+ */
+function get_user_locale( $user_id = 0 ) {
+	$user = false;
+	if ( 0 === $user_id && function_exists( 'wp_get_current_user' ) ) {
+		$user = wp_get_current_user();
+	} elseif ( $user_id instanceof WP_User ) {
+		$user = $user_id;
+	} elseif ( $user_id && is_numeric( $user_id ) ) {
+		$user = get_user_by( 'id', $user_id );
+	}
+
+	if ( ! $user ) {
+		return get_locale();
+	}
+
+	$locale = $user->locale;
+	return $locale ? $locale : get_locale();
+}
+
+/**
+ * Retrieve the translation of $text.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * *Note:* Don't use translate() directly, use __() or related functions.
+ *
+ * @since 2.2.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ * @return string Translated text
+ */
+function translate( $text, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translation  = $translations->translate( $text );
+
+	/**
+	 * Filters text with its translation.
+	 *
+	 * @since 2.0.11
+	 *
+	 * @param string $translation  Translated text.
+	 * @param string $text         Text to translate.
+	 * @param string $domain       Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'gettext', $translation, $text, $domain );
+}
+
+/**
+ * Remove last item on a pipe-delimited string.
+ *
+ * Meant for removing the last item in a string, such as 'Role name|User role'. The original
+ * string will be returned if no pipe '|' characters are found in the string.
+ *
+ * @since 2.8.0
+ *
+ * @param string $string A pipe-delimited string.
+ * @return string Either $string or everything before the last pipe.
+ */
+function before_last_bar( $string ) {
+	$last_bar = strrpos( $string, '|' );
+	if ( false === $last_bar ) {
+		return $string;
+	} else {
+		return substr( $string, 0, $last_bar );
+	}
+}
+
+/**
+ * Retrieve the translation of $text in the context defined in $context.
+ *
+ * If there is no translation, or the text domain isn't loaded the original
+ * text is returned.
+ *
+ * *Note:* Don't use translate_with_gettext_context() directly, use _x() or related functions.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string Translated text on success, original text on failure.
+ */
+function translate_with_gettext_context( $text, $context, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translation  = $translations->translate( $text, $context );
+	/**
+	 * Filters text with its translation based on context information.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $translation  Translated text.
+	 * @param string $text         Text to translate.
+	 * @param string $context      Context information for the translators.
+	 * @param string $domain       Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'gettext_with_context', $translation, $text, $context, $domain );
+}
+
+/**
+ * Retrieve the translation of $text.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.1.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ * @return string Translated text.
+ */
+function __( $text, $domain = 'default' ) {
+	return translate( $text, $domain );
+}
+
+/**
+ * Retrieve the translation of $text and escapes it for safe use in an attribute.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ * @return string Translated text on success, original text on failure.
+ */
+function esc_attr__( $text, $domain = 'default' ) {
+	return esc_attr( translate( $text, $domain ) );
+}
+
+/**
+ * Retrieve the translation of $text and escapes it for safe use in HTML output.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ * @return string Translated text
+ */
+function esc_html__( $text, $domain = 'default' ) {
+	return esc_html( translate( $text, $domain ) );
+}
+
+/**
+ * Display translated text.
+ *
+ * @since 1.2.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ */
+function _e( $text, $domain = 'default' ) {
+	echo translate( $text, $domain );
+}
+
+/**
+ * Display translated text that has been escaped for safe use in an attribute.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ */
+function esc_attr_e( $text, $domain = 'default' ) {
+	echo esc_attr( translate( $text, $domain ) );
+}
+
+/**
+ * Display translated text that has been escaped for safe use in HTML output.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ */
+function esc_html_e( $text, $domain = 'default' ) {
+	echo esc_html( translate( $text, $domain ) );
+}
+
+/**
+ * Retrieve translated string with gettext context.
+ *
+ * Quite a few times, there will be collisions with similar translatable text
+ * found in more than two places, but with different translated context.
+ *
+ * By including the context in the pot file, translators can translate the two
+ * strings differently.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string Translated context string without pipe.
+ */
+function _x( $text, $context, $domain = 'default' ) {
+	return translate_with_gettext_context( $text, $context, $domain );
+}
+
+/**
+ * Display translated string with gettext context.
+ *
+ * @since 3.0.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string Translated context string without pipe.
+ */
+function _ex( $text, $context, $domain = 'default' ) {
+	echo _x( $text, $context, $domain );
+}
+
+/**
+ * Translate string with gettext context, and escapes it for safe use in an attribute.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string Translated text
+ */
+function esc_attr_x( $text, $context, $domain = 'default' ) {
+	return esc_attr( translate_with_gettext_context( $text, $context, $domain ) );
+}
+
+/**
+ * Translate string with gettext context, and escapes it for safe use in HTML output.
+ *
+ * @since 2.9.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string Translated text.
+ */
+function esc_html_x( $text, $context, $domain = 'default' ) {
+	return esc_html( translate_with_gettext_context( $text, $context, $domain ) );
+}
+
+/**
+ * Translates and retrieves the singular or plural form based on the supplied number.
+ *
+ * Used when you want to use the appropriate form of a string based on whether a
+ * number is singular or plural.
+ *
+ * Example:
+ *
+ *     printf( _n( '%s person', '%s people', $count, 'text-domain' ), number_format_i18n( $count ) );
+ *
+ * @since 2.8.0
+ *
+ * @param string $single The text to be used if the number is singular.
+ * @param string $plural The text to be used if the number is plural.
+ * @param int    $number The number to compare against to use either the singular or plural form.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                       Default 'default'.
+ * @return string The translated singular or plural form.
+ */
+function _n( $single, $plural, $number, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translation  = $translations->translate_plural( $single, $plural, $number );
+
+	/**
+	 * Filters the singular or plural form of a string.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param string $translation Translated text.
+	 * @param string $single      The text to be used if the number is singular.
+	 * @param string $plural      The text to be used if the number is plural.
+	 * @param string $number      The number to compare against to use either the singular or plural form.
+	 * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain );
+}
+
+/**
+ * Translates and retrieves the singular or plural form based on the supplied number, with gettext context.
+ *
+ * This is a hybrid of _n() and _x(). It supports context and plurals.
+ *
+ * Used when you want to use the appropriate form of a string with context based on whether a
+ * number is singular or plural.
+ *
+ * Example of a generic phrase which is disambiguated via the context parameter:
+ *
+ *     printf( _nx( '%s group', '%s groups', $people, 'group of people', 'text-domain' ), number_format_i18n( $people ) );
+ *     printf( _nx( '%s group', '%s groups', $animals, 'group of animals', 'text-domain' ), number_format_i18n( $animals ) );
+ *
+ * @since 2.8.0
+ *
+ * @param string $single  The text to be used if the number is singular.
+ * @param string $plural  The text to be used if the number is plural.
+ * @param int    $number  The number to compare against to use either the singular or plural form.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                        Default 'default'.
+ * @return string The translated singular or plural form.
+ */
+function _nx($single, $plural, $number, $context, $domain = 'default') {
+	$translations = get_translations_for_domain( $domain );
+	$translation  = $translations->translate_plural( $single, $plural, $number, $context );
 
-	if (isset($l10n[$domain]))
-		return apply_filters('gettext', $l10n[$domain]->translate($text), $text);
+	/**
+	 * Filters the singular or plural form of a string with gettext context.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $translation Translated text.
+	 * @param string $single      The text to be used if the number is singular.
+	 * @param string $plural      The text to be used if the number is plural.
+	 * @param string $number      The number to compare against to use either the singular or plural form.
+	 * @param string $context     Context information for the translators.
+	 * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'ngettext_with_context', $translation, $single, $plural, $number, $context, $domain );
+}
+
+/**
+ * Registers plural strings in POT file, but does not translate them.
+ *
+ * Used when you want to keep structures with translatable plural
+ * strings and use them later when the number is known.
+ *
+ * Example:
+ *
+ *     $message = _n_noop( '%s post', '%s posts', 'text-domain' );
+ *     ...
+ *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
+ *
+ * @since 2.5.0
+ *
+ * @param string $singular Singular form to be localized.
+ * @param string $plural   Plural form to be localized.
+ * @param string $domain   Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                         Default null.
+ * @return array {
+ *     Array of translation information for the strings.
+ *
+ *     @type string $0        Singular form to be localized. No longer used.
+ *     @type string $1        Plural form to be localized. No longer used.
+ *     @type string $singular Singular form to be localized.
+ *     @type string $plural   Plural form to be localized.
+ *     @type null   $context  Context information for the translators.
+ *     @type string $domain   Text domain.
+ * }
+ */
+function _n_noop( $singular, $plural, $domain = null ) {
+	return array( 0 => $singular, 1 => $plural, 'singular' => $singular, 'plural' => $plural, 'context' => null, 'domain' => $domain );
+}
+
+/**
+ * Registers plural strings with gettext context in POT file, but does not translate them.
+ *
+ * Used when you want to keep structures with translatable plural
+ * strings and use them later when the number is known.
+ *
+ * Example of a generic phrase which is disambiguated via the context parameter:
+ *
+ *     $messages = array(
+ *      	'people'  => _nx_noop( '%s group', '%s groups', 'people', 'text-domain' ),
+ *      	'animals' => _nx_noop( '%s group', '%s groups', 'animals', 'text-domain' ),
+ *     );
+ *     ...
+ *     $message = $messages[ $type ];
+ *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
+ *
+ * @since 2.8.0
+ *
+ * @param string $singular Singular form to be localized.
+ * @param string $plural   Plural form to be localized.
+ * @param string $context  Context information for the translators.
+ * @param string $domain   Optional. Text domain. Unique identifier for retrieving translated strings.
+ *                         Default null.
+ * @return array {
+ *     Array of translation information for the strings.
+ *
+ *     @type string $0        Singular form to be localized. No longer used.
+ *     @type string $1        Plural form to be localized. No longer used.
+ *     @type string $2        Context information for the translators. No longer used.
+ *     @type string $singular Singular form to be localized.
+ *     @type string $plural   Plural form to be localized.
+ *     @type string $context  Context information for the translators.
+ *     @type string $domain   Text domain.
+ * }
+ */
+function _nx_noop( $singular, $plural, $context, $domain = null ) {
+	return array( 0 => $singular, 1 => $plural, 2 => $context, 'singular' => $singular, 'plural' => $plural, 'context' => $context, 'domain' => $domain );
+}
+
+/**
+ * Translates and retrieves the singular or plural form of a string that's been registered
+ * with _n_noop() or _nx_noop().
+ *
+ * Used when you want to use a translatable plural string once the number is known.
+ *
+ * Example:
+ *
+ *     $message = _n_noop( '%s post', '%s posts', 'text-domain' );
+ *     ...
+ *     printf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
+ *
+ * @since 3.1.0
+ *
+ * @param array  $nooped_plural Array with singular, plural, and context keys, usually the result of _n_noop() or _nx_noop().
+ * @param int    $count         Number of objects.
+ * @param string $domain        Optional. Text domain. Unique identifier for retrieving translated strings. If $nooped_plural contains
+ *                              a text domain passed to _n_noop() or _nx_noop(), it will override this value. Default 'default'.
+ * @return string Either $single or $plural translated text.
+ */
+function translate_nooped_plural( $nooped_plural, $count, $domain = 'default' ) {
+	if ( $nooped_plural['domain'] )
+		$domain = $nooped_plural['domain'];
+
+	if ( $nooped_plural['context'] )
+		return _nx( $nooped_plural['singular'], $nooped_plural['plural'], $count, $nooped_plural['context'], $domain );
 	else
-		return $text;
+		return _n( $nooped_plural['singular'], $nooped_plural['plural'], $count, $domain );
 }
 
-// Return a translated string.
-function __($text, $domain = 'default') {
-	return translate($text, $domain);
+/**
+ * Load a .mo file into the text domain $domain.
+ *
+ * If the text domain already exists, the translations will be merged. If both
+ * sets have the same string, the translation from the original value will be taken.
+ *
+ * On success, the .mo file will be placed in the $l10n global by $domain
+ * and will be a MO object.
+ *
+ * @since 1.5.0
+ *
+ * @global array $l10n          An array of all currently loaded text domains.
+ * @global array $l10n_unloaded An array of all text domains that have been unloaded again.
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param string $mofile Path to the .mo file.
+ * @return bool True on success, false on failure.
+ */
+function load_textdomain( $domain, $mofile ) {
+	global $l10n, $l10n_unloaded;
+
+	$l10n_unloaded = (array) $l10n_unloaded;
+
+	/**
+	 * Filters whether to override the .mo file loading.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param bool   $override Whether to override the .mo file loading. Default false.
+	 * @param string $domain   Text domain. Unique identifier for retrieving translated strings.
+	 * @param string $mofile   Path to the MO file.
+	 */
+	$plugin_override = apply_filters( 'override_load_textdomain', false, $domain, $mofile );
+
+	if ( true == $plugin_override ) {
+		unset( $l10n_unloaded[ $domain ] );
+
+		return true;
+	}
+
+	/**
+	 * Fires before the MO translation file is loaded.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 * @param string $mofile Path to the .mo file.
+	 */
+	do_action( 'load_textdomain', $domain, $mofile );
+
+	/**
+	 * Filters MO file path for loading translations for a specific text domain.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param string $mofile Path to the MO file.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$mofile = apply_filters( 'load_textdomain_mofile', $mofile, $domain );
+
+	if ( !is_readable( $mofile ) ) return false;
+
+	$mo = new MO();
+	if ( !$mo->import_from_file( $mofile ) ) return false;
+
+	if ( isset( $l10n[$domain] ) )
+		$mo->merge_with( $l10n[$domain] );
+
+	unset( $l10n_unloaded[ $domain ] );
+
+	$l10n[$domain] = &$mo;
+
+	return true;
 }
 
-// Echo a translated string.
-function _e($text, $domain = 'default') {
-	echo translate($text, $domain);
+/**
+ * Unload translations for a text domain.
+ *
+ * @since 3.0.0
+ *
+ * @global array $l10n          An array of all currently loaded text domains.
+ * @global array $l10n_unloaded An array of all text domains that have been unloaded again.
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool Whether textdomain was unloaded.
+ */
+function unload_textdomain( $domain ) {
+	global $l10n, $l10n_unloaded;
+
+	$l10n_unloaded = (array) $l10n_unloaded;
+
+	/**
+	 * Filters whether to override the text domain unloading.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param bool   $override Whether to override the text domain unloading. Default false.
+	 * @param string $domain   Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$plugin_override = apply_filters( 'override_unload_textdomain', false, $domain );
+
+	if ( $plugin_override ) {
+		$l10n_unloaded[ $domain ] = true;
+
+		return true;
+	}
+
+	/**
+	 * Fires before the text domain is unloaded.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	do_action( 'unload_textdomain', $domain );
+
+	if ( isset( $l10n[$domain] ) ) {
+		unset( $l10n[$domain] );
+
+		$l10n_unloaded[ $domain ] = true;
+
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Load default translated strings based on locale.
+ *
+ * Loads the .mo file in WP_LANG_DIR constant path from WordPress root.
+ * The translated (.mo) file is named based on the locale.
+ *
+ * @see load_textdomain()
+ *
+ * @since 1.5.0
+ *
+ * @param string $locale Optional. Locale to load. Default is the value of get_locale().
+ * @return bool Whether the textdomain was loaded.
+ */
+function load_default_textdomain( $locale = null ) {
+	if ( null === $locale ) {
+		$locale = is_admin() ? get_user_locale() : get_locale();
+	}
+
+	// Unload previously loaded strings so we can switch translations.
+	unload_textdomain( 'default' );
+
+	$return = load_textdomain( 'default', WP_LANG_DIR . "/$locale.mo" );
+
+	if ( ( is_multisite() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) && ! file_exists(  WP_LANG_DIR . "/admin-$locale.mo" ) ) {
+		load_textdomain( 'default', WP_LANG_DIR . "/ms-$locale.mo" );
+		return $return;
+	}
+
+	if ( is_admin() || wp_installing() || ( defined( 'WP_REPAIRING' ) && WP_REPAIRING ) ) {
+		load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo" );
+	}
+
+	if ( is_network_admin() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) )
+		load_textdomain( 'default', WP_LANG_DIR . "/admin-network-$locale.mo" );
+
+	return $return;
 }
 
-function _c($text, $domain = 'default') {
-	$whole = translate($text, $domain);
-	$last_bar = strrpos($whole, '|');
-	if ( false == $last_bar ) {
-		return $whole;
+/**
+ * Loads a plugin's translated strings.
+ *
+ * If the path is not given then it will be the root of the plugin directory.
+ *
+ * The .mo file should be named based on the text domain with a dash, and then the locale exactly.
+ *
+ * @since 1.5.0
+ * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
+ *
+ * @param string $domain          Unique identifier for retrieving translated strings
+ * @param string $deprecated      Optional. Use the $plugin_rel_path parameter instead. Default false.
+ * @param string $plugin_rel_path Optional. Relative path to WP_PLUGIN_DIR where the .mo file resides.
+ *                                Default false.
+ * @return bool True when textdomain is successfully loaded, false otherwise.
+ */
+function load_plugin_textdomain( $domain, $deprecated = false, $plugin_rel_path = false ) {
+	/**
+	 * Filters a plugin's locale.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $locale The plugin's current locale.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$locale = apply_filters( 'plugin_locale', is_admin() ? get_user_locale() : get_locale(), $domain );
+
+	$mofile = $domain . '-' . $locale . '.mo';
+
+	// Try to load from the languages directory first.
+	if ( load_textdomain( $domain, WP_LANG_DIR . '/plugins/' . $mofile ) ) {
+		return true;
+	}
+
+	if ( false !== $plugin_rel_path ) {
+		$path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
+	} elseif ( false !== $deprecated ) {
+		_deprecated_argument( __FUNCTION__, '2.7.0' );
+		$path = ABSPATH . trim( $deprecated, '/' );
 	} else {
-		return substr($whole, 0, $last_bar);
+		$path = WP_PLUGIN_DIR;
 	}
+
+	return load_textdomain( $domain, $path . '/' . $mofile );
 }
 
-// Return the plural form.
-function __ngettext($single, $plural, $number, $domain = 'default') {
+/**
+ * Load the translated strings for a plugin residing in the mu-plugins directory.
+ *
+ * @since 3.0.0
+ * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
+ *
+ * @param string $domain             Text domain. Unique identifier for retrieving translated strings.
+ * @param string $mu_plugin_rel_path Optional. Relative to `WPMU_PLUGIN_DIR` directory in which the .mo
+ *                                   file resides. Default empty string.
+ * @return bool True when textdomain is successfully loaded, false otherwise.
+ */
+function load_muplugin_textdomain( $domain, $mu_plugin_rel_path = '' ) {
+	/** This filter is documented in wp-includes/l10n.php */
+	$locale = apply_filters( 'plugin_locale', is_admin() ? get_user_locale() : get_locale(), $domain );
+
+	$mofile = $domain . '-' . $locale . '.mo';
+
+	// Try to load from the languages directory first.
+	if ( load_textdomain( $domain, WP_LANG_DIR . '/plugins/' . $mofile ) ) {
+		return true;
+	}
+
+	$path = trailingslashit( WPMU_PLUGIN_DIR . '/' . ltrim( $mu_plugin_rel_path, '/' ) );
+
+	return load_textdomain( $domain, $path . '/' . $mofile );
+}
+
+/**
+ * Load the theme's translated strings.
+ *
+ * If the current locale exists as a .mo file in the theme's root directory, it
+ * will be included in the translated strings by the $domain.
+ *
+ * The .mo files must be named based on the locale exactly.
+ *
+ * @since 1.5.0
+ * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param string $path   Optional. Path to the directory containing the .mo file.
+ *                       Default false.
+ * @return bool True when textdomain is successfully loaded, false otherwise.
+ */
+function load_theme_textdomain( $domain, $path = false ) {
+	/**
+	 * Filters a theme's locale.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $locale The theme's current locale.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$locale = apply_filters( 'theme_locale', is_admin() ? get_user_locale() : get_locale(), $domain );
+
+	$mofile = $domain . '-' . $locale . '.mo';
+
+	// Try to load from the languages directory first.
+	if ( load_textdomain( $domain, WP_LANG_DIR . '/themes/' . $mofile ) ) {
+		return true;
+	}
+
+	if ( ! $path ) {
+		$path = get_template_directory();
+	}
+
+	return load_textdomain( $domain, $path . '/' . $locale . '.mo' );
+}
+
+/**
+ * Load the child themes translated strings.
+ *
+ * If the current locale exists as a .mo file in the child themes
+ * root directory, it will be included in the translated strings by the $domain.
+ *
+ * The .mo files must be named based on the locale exactly.
+ *
+ * @since 2.9.0
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param string $path   Optional. Path to the directory containing the .mo file.
+ *                       Default false.
+ * @return bool True when the theme textdomain is successfully loaded, false otherwise.
+ */
+function load_child_theme_textdomain( $domain, $path = false ) {
+	if ( ! $path )
+		$path = get_stylesheet_directory();
+	return load_theme_textdomain( $domain, $path );
+}
+
+/**
+ * Loads plugin and theme textdomains just-in-time.
+ *
+ * When a textdomain is encountered for the first time, we try to load
+ * the translation file from `wp-content/languages`, removing the need
+ * to call load_plugin_texdomain() or load_theme_texdomain().
+ *
+ * @since 4.6.0
+ * @access private
+ *
+ * @see get_translations_for_domain()
+ * @global array $l10n_unloaded An array of all text domains that have been unloaded again.
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool True when the textdomain is successfully loaded, false otherwise.
+ */
+function _load_textdomain_just_in_time( $domain ) {
+	global $l10n_unloaded;
+
+	$l10n_unloaded = (array) $l10n_unloaded;
+
+	// Short-circuit if domain is 'default' which is reserved for core.
+	if ( 'default' === $domain || isset( $l10n_unloaded[ $domain ] ) ) {
+		return false;
+	}
+
+	$translation_path = _get_path_to_translation( $domain );
+	if ( false === $translation_path ) {
+		return false;
+	}
+
+	return load_textdomain( $domain, $translation_path );
+}
+
+/**
+ * Gets the path to a translation file for loading a textdomain just in time.
+ *
+ * Caches the retrieved results internally.
+ *
+ * @since 4.7.0
+ * @access private
+ *
+ * @see _load_textdomain_just_in_time()
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param bool   $reset  Whether to reset the internal cache. Used by the switch to locale functionality.
+ * @return string|false The path to the translation file or false if no translation file was found.
+ */
+function _get_path_to_translation( $domain, $reset = false ) {
+	static $available_translations = array();
+
+	if ( true === $reset ) {
+		$available_translations = array();
+	}
+
+	if ( ! isset( $available_translations[ $domain ] ) ) {
+		$available_translations[ $domain ] = _get_path_to_translation_from_lang_dir( $domain );
+	}
+
+	return $available_translations[ $domain ];
+}
+
+/**
+ * Gets the path to a translation file in the languages directory for the current locale.
+ *
+ * Holds a cached list of available .mo files to improve performance.
+ *
+ * @since 4.7.0
+ * @access private
+ *
+ * @see _get_path_to_translation()
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return string|false The path to the translation file or false if no translation file was found.
+ */
+function _get_path_to_translation_from_lang_dir( $domain ) {
+	static $cached_mofiles = null;
+
+	if ( null === $cached_mofiles ) {
+		$cached_mofiles = array();
+
+		$locations = array(
+			WP_LANG_DIR . '/plugins',
+			WP_LANG_DIR . '/themes',
+		);
+
+		foreach ( $locations as $location ) {
+			$mofiles = glob( $location . '/*.mo' );
+			if ( $mofiles ) {
+				$cached_mofiles = array_merge( $cached_mofiles, $mofiles );
+			}
+		}
+	}
+
+	$locale = is_admin() ? get_user_locale() : get_locale();
+	$mofile = "{$domain}-{$locale}.mo";
+
+	$path = WP_LANG_DIR . '/plugins/' . $mofile;
+	if ( in_array( $path, $cached_mofiles ) ) {
+		return $path;
+	}
+
+	$path = WP_LANG_DIR . '/themes/' . $mofile;
+	if ( in_array( $path, $cached_mofiles ) ) {
+		return $path;
+	}
+
+	return false;
+}
+
+/**
+ * Return the Translations instance for a text domain.
+ *
+ * If there isn't one, returns empty Translations instance.
+ *
+ * @since 2.8.0
+ *
+ * @global array $l10n
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return Translations|NOOP_Translations A Translations instance.
+ */
+function get_translations_for_domain( $domain ) {
 	global $l10n;
+	if ( isset( $l10n[ $domain ] ) || ( _load_textdomain_just_in_time( $domain ) && isset( $l10n[ $domain ] ) ) ) {
+		return $l10n[ $domain ];
+	}
 
-	if (isset($l10n[$domain])) {
-		return apply_filters('ngettext', $l10n[$domain]->ngettext($single, $plural, $number), $single, $plural, $number);
-	} else {
-		if ($number != 1)
-			return $plural;
-		else
-			return $single;
+	static $noop_translations = null;
+	if ( null === $noop_translations ) {
+		$noop_translations = new NOOP_Translations;
 	}
+
+	return $noop_translations;
 }
 
-function load_textdomain($domain, $mofile) {
+/**
+ * Whether there are translations for the text domain.
+ *
+ * @since 3.0.0
+ *
+ * @global array $l10n
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool Whether there are translations.
+ */
+function is_textdomain_loaded( $domain ) {
 	global $l10n;
+	return isset( $l10n[ $domain ] );
+}
 
-	if (isset($l10n[$domain]))
-		return;
+/**
+ * Translates role name.
+ *
+ * Since the role names are in the database and not in the source there
+ * are dummy gettext calls to get them into the POT file and this function
+ * properly translates them back.
+ *
+ * The before_last_bar() call is needed, because older installs keep the roles
+ * using the old context format: 'Role name|User role' and just skipping the
+ * content after the last bar is easier than fixing them in the DB. New installs
+ * won't suffer from that problem.
+ *
+ * @since 2.8.0
+ *
+ * @param string $name The role name.
+ * @return string Translated role name on success, original name on failure.
+ */
+function translate_user_role( $name ) {
+	return translate_with_gettext_context( before_last_bar($name), 'User role' );
+}
 
-	if ( is_readable($mofile))
-		$input = new CachedFileReader($mofile);
-	else
-		return;
+/**
+ * Get all available languages based on the presence of *.mo files in a given directory.
+ *
+ * The default directory is WP_LANG_DIR.
+ *
+ * @since 3.0.0
+ * @since 4.7.0 The results are now filterable with the {@see 'get_available_languages'} filter.
+ *
+ * @param string $dir A directory to search for language files.
+ *                    Default WP_LANG_DIR.
+ * @return array An array of language codes or an empty array if no languages are present. Language codes are formed by stripping the .mo extension from the language file names.
+ */
+function get_available_languages( $dir = null ) {
+	$languages = array();
 
-	$l10n[$domain] = new gettext_reader($input);
+	$lang_files = glob( ( is_null( $dir ) ? WP_LANG_DIR : $dir ) . '/*.mo' );
+	if ( $lang_files ) {
+		foreach ( $lang_files as $lang_file ) {
+			$lang_file = basename( $lang_file, '.mo' );
+			if ( 0 !== strpos( $lang_file, 'continents-cities' ) && 0 !== strpos( $lang_file, 'ms-' ) &&
+				0 !== strpos( $lang_file, 'admin-' ) ) {
+				$languages[] = $lang_file;
+			}
+		}
+	}
+
+	/**
+	 * Filters the list of available language codes.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param array  $languages An array of available language codes.
+	 * @param string $dir       The directory where the language files were found.
+	 */
+	return apply_filters( 'get_available_languages', $languages, $dir );
 }
 
-function load_default_textdomain() {
-	global $l10n;
+/**
+ * Get installed translations.
+ *
+ * Looks in the wp-content/languages directory for translations of
+ * plugins or themes.
+ *
+ * @since 3.7.0
+ *
+ * @param string $type What to search for. Accepts 'plugins', 'themes', 'core'.
+ * @return array Array of language data.
+ */
+function wp_get_installed_translations( $type ) {
+	if ( $type !== 'themes' && $type !== 'plugins' && $type !== 'core' )
+		return array();
 
-	$locale = get_locale();
-	if ( empty($locale) )
-		$locale = 'en_US';
+	$dir = 'core' === $type ? '' : "/$type";
+
+	if ( ! is_dir( WP_LANG_DIR ) )
+		return array();
+
+	if ( $dir && ! is_dir( WP_LANG_DIR . $dir ) )
+		return array();
+
+	$files = scandir( WP_LANG_DIR . $dir );
+	if ( ! $files )
+		return array();
 
-	$mofile = ABSPATH . LANGDIR . "/$locale.mo";
+	$language_data = array();
 
-	load_textdomain('default', $mofile);
+	foreach ( $files as $file ) {
+		if ( '.' === $file[0] || is_dir( WP_LANG_DIR . "$dir/$file" ) ) {
+			continue;
+		}
+		if ( substr( $file, -3 ) !== '.po' ) {
+			continue;
+		}
+		if ( ! preg_match( '/(?:(.+)-)?([a-z]{2,3}(?:_[A-Z]{2})?(?:_[a-z0-9]+)?).po/', $file, $match ) ) {
+			continue;
+		}
+		if ( ! in_array( substr( $file, 0, -3 ) . '.mo', $files ) )  {
+			continue;
+		}
+
+		list( , $textdomain, $language ) = $match;
+		if ( '' === $textdomain ) {
+			$textdomain = 'default';
+		}
+		$language_data[ $textdomain ][ $language ] = wp_get_pomo_file_data( WP_LANG_DIR . "$dir/$file" );
+	}
+	return $language_data;
 }
 
-function load_plugin_textdomain($domain, $path = false) {
-	$locale = get_locale();
-	if ( empty($locale) )
-		$locale = 'en_US';
+/**
+ * Extract headers from a PO file.
+ *
+ * @since 3.7.0
+ *
+ * @param string $po_file Path to PO file.
+ * @return array PO file headers.
+ */
+function wp_get_pomo_file_data( $po_file ) {
+	$headers = get_file_data( $po_file, array(
+		'POT-Creation-Date'  => '"POT-Creation-Date',
+		'PO-Revision-Date'   => '"PO-Revision-Date',
+		'Project-Id-Version' => '"Project-Id-Version',
+		'X-Generator'        => '"X-Generator',
+	) );
+	foreach ( $headers as $header => $value ) {
+		// Remove possible contextual '\n' and closing double quote.
+		$headers[ $header ] = preg_replace( '~(\\\n)?"$~', '', $value );
+	}
+	return $headers;
+}
+
+/**
+ * Language selector.
+ *
+ * @since 4.0.0
+ * @since 4.3.0 Introduced the `echo` argument.
+ * @since 4.7.0 Introduced the `show_option_site_default` argument.
+ *
+ * @see get_available_languages()
+ * @see wp_get_available_translations()
+ *
+ * @param string|array $args {
+ *     Optional. Array or string of arguments for outputting the language selector.
+ *
+ *     @type string   $id                           ID attribute of the select element. Default empty.
+ *     @type string   $name                         Name attribute of the select element. Default empty.
+ *     @type array    $languages                    List of installed languages, contain only the locales.
+ *                                                  Default empty array.
+ *     @type array    $translations                 List of available translations. Default result of
+ *                                                  wp_get_available_translations().
+ *     @type string   $selected                     Language which should be selected. Default empty.
+ *     @type bool|int $echo                         Whether to echo the generated markup. Accepts 0, 1, or their
+ *                                                  boolean equivalents. Default 1.
+ *     @type bool     $show_available_translations  Whether to show available translations. Default true.
+ *     @type bool     $show_option_site_default     Whether to show an option to fall back to the site's locale. Default false.
+ * }
+ * @return string HTML content
+ */
+function wp_dropdown_languages( $args = array() ) {
+
+	$args = wp_parse_args( $args, array(
+		'id'           => '',
+		'name'         => '',
+		'languages'    => array(),
+		'translations' => array(),
+		'selected'     => '',
+		'echo'         => 1,
+		'show_available_translations' => true,
+		'show_option_site_default'    => false,
+	) );
+
+	// English (United States) uses an empty string for the value attribute.
+	if ( 'en_US' === $args['selected'] ) {
+		$args['selected'] = '';
+	}
+
+	$translations = $args['translations'];
+	if ( empty( $translations ) ) {
+		require_once( ABSPATH . 'wp-admin/includes/translation-install.php' );
+		$translations = wp_get_available_translations();
+	}
+
+	/*
+	 * $args['languages'] should only contain the locales. Find the locale in
+	 * $translations to get the native name. Fall back to locale.
+	 */
+	$languages = array();
+	foreach ( $args['languages'] as $locale ) {
+		if ( isset( $translations[ $locale ] ) ) {
+			$translation = $translations[ $locale ];
+			$languages[] = array(
+				'language'    => $translation['language'],
+				'native_name' => $translation['native_name'],
+				'lang'        => current( $translation['iso'] ),
+			);
+
+			// Remove installed language from available translations.
+			unset( $translations[ $locale ] );
+		} else {
+			$languages[] = array(
+				'language'    => $locale,
+				'native_name' => $locale,
+				'lang'        => '',
+			);
+		}
+	}
+
+	$translations_available = ( ! empty( $translations ) && $args['show_available_translations'] );
+
+	$output = sprintf( '<select name="%s" id="%s">', esc_attr( $args['name'] ), esc_attr( $args['id'] ) );
+
+	// Holds the HTML markup.
+	$structure = array();
+
+	// List installed languages.
+	if ( $translations_available ) {
+		$structure[] = '<optgroup label="' . esc_attr_x( 'Installed', 'translations' ) . '">';
+	}
+
+	if ( $args['show_option_site_default'] ) {
+		$structure[] = sprintf(
+			'<option value="site-default" data-installed="1"%s>%s</option>',
+			selected( 'site-default', $args['selected'], false ),
+			_x( 'Site Default', 'default site language' )
+		);
+	}
+
+	$structure[] = sprintf(
+		'<option value="" lang="en" data-installed="1"%s>English (United States)</option>',
+		selected( '', $args['selected'], false )
+	);
+
+	foreach ( $languages as $language ) {
+		$structure[] = sprintf(
+			'<option value="%s" lang="%s"%s data-installed="1">%s</option>',
+			esc_attr( $language['language'] ),
+			esc_attr( $language['lang'] ),
+			selected( $language['language'], $args['selected'], false ),
+			esc_html( $language['native_name'] )
+		);
+	}
+	if ( $translations_available ) {
+		$structure[] = '</optgroup>';
+	}
+
+	// List available translations.
+	if ( $translations_available ) {
+		$structure[] = '<optgroup label="' . esc_attr_x( 'Available', 'translations' ) . '">';
+		foreach ( $translations as $translation ) {
+			$structure[] = sprintf(
+				'<option value="%s" lang="%s"%s>%s</option>',
+				esc_attr( $translation['language'] ),
+				esc_attr( current( $translation['iso'] ) ),
+				selected( $translation['language'], $args['selected'], false ),
+				esc_html( $translation['native_name'] )
+			);
+		}
+		$structure[] = '</optgroup>';
+	}
+
+	$output .= join( "\n", $structure );
+
+	$output .= '</select>';
+
+	if ( $args['echo'] ) {
+		echo $output;
+	}
 
-	if ( false === $path )
-		$path = PLUGINDIR;
+	return $output;
+}
 
-	$mofile = ABSPATH . "$path/$domain-$locale.mo";
-	load_textdomain($domain, $mofile);
+/**
+ * Checks if current locale is RTL.
+ *
+ * @since 3.0.0
+ *
+ * @global WP_Locale $wp_locale
+ *
+ * @return bool Whether locale is RTL.
+ */
+function is_rtl() {
+	global $wp_locale;
+	if ( ! ( $wp_locale instanceof WP_Locale ) ) {
+		return false;
+	}
+	return $wp_locale->is_rtl();
 }
 
-function load_theme_textdomain($domain) {
-	$locale = get_locale();
-	if ( empty($locale) )
-		$locale = 'en_US';
+/**
+ * Switches the translations according to the given locale.
+ *
+ * @since 4.7.0
+ *
+ * @global WP_Locale_Switcher $wp_locale_switcher
+ *
+ * @param string $locale The locale.
+ * @return bool True on success, false on failure.
+ */
+function switch_to_locale( $locale ) {
+	/* @var WP_Locale_Switcher $wp_locale_switcher */
+	global $wp_locale_switcher;
+
+	return $wp_locale_switcher->switch_to_locale( $locale );
+}
 
-	$mofile = get_template_directory() . "/$locale.mo";
-	load_textdomain($domain, $mofile);
+/**
+ * Restores the translations according to the previous locale.
+ *
+ * @since 4.7.0
+ *
+ * @global WP_Locale_Switcher $wp_locale_switcher
+ *
+ * @return string|false Locale on success, false on error.
+ */
+function restore_previous_locale() {
+	/* @var WP_Locale_Switcher $wp_locale_switcher */
+	global $wp_locale_switcher;
+
+	return $wp_locale_switcher->restore_previous_locale();
+}
+
+/**
+ * Restores the translations according to the original locale.
+ *
+ * @since 4.7.0
+ *
+ * @global WP_Locale_Switcher $wp_locale_switcher
+ *
+ * @return string|false Locale on success, false on error.
+ */
+function restore_current_locale() {
+	/* @var WP_Locale_Switcher $wp_locale_switcher */
+	global $wp_locale_switcher;
+
+	return $wp_locale_switcher->restore_current_locale();
 }
 
-?>
+/**
+ * Whether switch_to_locale() is in effect.
+ *
+ * @since 4.7.0
+ *
+ * @global WP_Locale_Switcher $wp_locale_switcher
+ *
+ * @return bool True if the locale has been switched, false otherwise.
+ */
+function is_locale_switched() {
+	/* @var WP_Locale_Switcher $wp_locale_switcher */
+	global $wp_locale_switcher;
+
+	return $wp_locale_switcher->is_switched();
+}