<?php

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/**

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* Theme, template, and stylesheet functions.

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*

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* @package WordPress

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* @subpackage Theme

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*/

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/**

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* Returns an array of WP_Theme objects based on the arguments.

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*

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* Despite advances over get_themes(), this function is quite expensive, and grows

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* linearly with additional themes. Stick to wp_get_theme() if possible.

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*

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* @since 3.4.0

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*

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* @global array $wp_theme_directories

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*

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* @param array $args {

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* Optional. The search arguments.

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*

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* @type mixed $errors True to return themes with errors, false to return

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* themes without errors, null to return all themes.

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* Default false.

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* @type mixed $allowed (Multisite) True to return only allowed themes for a site.

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* False to return only disallowed themes for a site.

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* 'site' to return only site-allowed themes.

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* 'network' to return only network-allowed themes.

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* Null to return all themes. Default null.

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* @type int $blog_id (Multisite) The blog ID used to calculate which themes

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* are allowed. Default 0, synonymous for the current blog.

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* }

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* @return WP_Theme[] Array of WP_Theme objects.

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*/

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function wp_get_themes( $args = array() ) {

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global $wp_theme_directories;

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$defaults = array(

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'errors' => false,

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'allowed' => null,

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'blog_id' => 0,

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);

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$args = wp_parse_args( $args, $defaults );

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$theme_directories = search_theme_directories();

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if ( is_array( $wp_theme_directories ) && count( $wp_theme_directories ) > 1 ) {

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// Make sure the current theme wins out, in case search_theme_directories() picks the wrong

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// one in the case of a conflict. (Normally, last registered theme root wins.)

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$current_theme = get_stylesheet();

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if ( isset( $theme_directories[ $current_theme ] ) ) {

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$root_of_current_theme = get_raw_theme_root( $current_theme );

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if ( ! in_array( $root_of_current_theme, $wp_theme_directories, true ) ) {

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$root_of_current_theme = WP_CONTENT_DIR . $root_of_current_theme;

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}

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$theme_directories[ $current_theme ]['theme_root'] = $root_of_current_theme;

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}

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}

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if ( empty( $theme_directories ) ) {

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return array();

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}

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if ( is_multisite() && null !== $args['allowed'] ) {

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$allowed = $args['allowed'];

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if ( 'network' === $allowed ) {

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$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_network() );

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} elseif ( 'site' === $allowed ) {

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$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_site( $args['blog_id'] ) );

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} elseif ( $allowed ) {

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$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );

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} else {

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$theme_directories = array_diff_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );

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}

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}

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$themes = array();

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static $_themes = array();

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foreach ( $theme_directories as $theme => $theme_root ) {

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if ( isset( $_themes[ $theme_root['theme_root'] . '/' . $theme ] ) ) {

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$themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ];

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} else {

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$themes[ $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );

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$_themes[ $theme_root['theme_root'] . '/' . $theme ] = $themes[ $theme ];

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}

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}

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if ( null !== $args['errors'] ) {

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foreach ( $themes as $theme => $wp_theme ) {

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if ( $wp_theme->errors() != $args['errors'] ) {

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unset( $themes[ $theme ] );

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}

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}

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}

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return $themes;

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}

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/**

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* Gets a WP_Theme object for a theme.

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*

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* @since 3.4.0

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*

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* @global array $wp_theme_directories

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*

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* @param string $stylesheet Optional. Directory name for the theme. Defaults to current theme.

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* @param string $theme_root Optional. Absolute path of the theme root to look in.

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* If not specified, get_raw_theme_root() is used to calculate

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* the theme root for the $stylesheet provided (or current theme).

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* @return WP_Theme Theme object. Be sure to check the object's exists() method

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* if you need to confirm the theme's existence.

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*/

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function wp_get_theme( $stylesheet = '', $theme_root = '' ) {

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global $wp_theme_directories;

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if ( empty( $stylesheet ) ) {

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$stylesheet = get_stylesheet();

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}

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if ( empty( $theme_root ) ) {

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$theme_root = get_raw_theme_root( $stylesheet );

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if ( false === $theme_root ) {

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$theme_root = WP_CONTENT_DIR . '/themes';

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} elseif ( ! in_array( $theme_root, (array) $wp_theme_directories, true ) ) {

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$theme_root = WP_CONTENT_DIR . $theme_root;

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}

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}

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return new WP_Theme( $stylesheet, $theme_root );

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}

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/**

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* Clears the cache held by get_theme_roots() and WP_Theme.

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*

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* @since 3.5.0

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* @param bool $clear_update_cache Whether to clear the theme updates cache.

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*/

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function wp_clean_themes_cache( $clear_update_cache = true ) {

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if ( $clear_update_cache ) {

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delete_site_transient( 'update_themes' );

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}

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search_theme_directories( true );

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foreach ( wp_get_themes( array( 'errors' => null ) ) as $theme ) {

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$theme->cache_delete();

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}

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}

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/**

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* Whether a child theme is in use.

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*

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* @since 3.0.0

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*

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* @return bool True if a child theme is in use, false otherwise.

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*/

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function is_child_theme() {

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return ( TEMPLATEPATH !== STYLESHEETPATH );

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}

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/**

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* Retrieves name of the current stylesheet.

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*

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* The theme name that is currently set as the front end theme.

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*

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* For all intents and purposes, the template name and the stylesheet name

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* are going to be the same for most cases.

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*

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* @since 1.5.0

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*

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* @return string Stylesheet name.

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*/

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function get_stylesheet() {

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/**

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* Filters the name of current stylesheet.

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*

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* @since 1.5.0

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*

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* @param string $stylesheet Name of the current stylesheet.

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*/

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return apply_filters( 'stylesheet', get_option( 'stylesheet' ) );

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}

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/**

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* Retrieves stylesheet directory path for current theme.

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*

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* @since 1.5.0

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*

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* @return string Path to current theme's stylesheet directory.

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*/

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function get_stylesheet_directory() {

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$stylesheet = get_stylesheet();

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$theme_root = get_theme_root( $stylesheet );

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$stylesheet_dir = "$theme_root/$stylesheet";

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/**

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* Filters the stylesheet directory path for current theme.

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*

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* @since 1.5.0

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*

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* @param string $stylesheet_dir Absolute path to the current theme.

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* @param string $stylesheet Directory name of the current theme.

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* @param string $theme_root Absolute path to themes directory.

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*/

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return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );

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}

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/**

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* Retrieves stylesheet directory URI for current theme.

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*

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* @since 1.5.0

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*

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* @return string URI to current theme's stylesheet directory.

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*/

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function get_stylesheet_directory_uri() {

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$stylesheet = str_replace( '%2F', '/', rawurlencode( get_stylesheet() ) );

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$theme_root_uri = get_theme_root_uri( $stylesheet );

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$stylesheet_dir_uri = "$theme_root_uri/$stylesheet";

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/**

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* Filters the stylesheet directory URI.

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*

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* @since 1.5.0

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*

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* @param string $stylesheet_dir_uri Stylesheet directory URI.

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* @param string $stylesheet Name of the activated theme's directory.

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* @param string $theme_root_uri Themes root URI.

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*/

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return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );

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}

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/**

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* Retrieves stylesheet URI for current theme.

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*

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* The stylesheet file name is 'style.css' which is appended to the stylesheet directory URI path.

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* See get_stylesheet_directory_uri().

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*

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* @since 1.5.0

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*

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* @return string URI to current theme's stylesheet.

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*/

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function get_stylesheet_uri() {

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$stylesheet_dir_uri = get_stylesheet_directory_uri();

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$stylesheet_uri = $stylesheet_dir_uri . '/style.css';

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/**

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* Filters the URI of the current theme stylesheet.

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*

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* @since 1.5.0

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*

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* @param string $stylesheet_uri Stylesheet URI for the current theme/child theme.

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* @param string $stylesheet_dir_uri Stylesheet directory URI for the current theme/child theme.

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*/

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return apply_filters( 'stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );

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}

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/**

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* Retrieves the localized stylesheet URI.

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*

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* The stylesheet directory for the localized stylesheet files are located, by

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* default, in the base theme directory. The name of the locale file will be the

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* locale followed by '.css'. If that does not exist, then the text direction

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* stylesheet will be checked for existence, for example 'ltr.css'.

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*

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* The theme may change the location of the stylesheet directory by either using

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* the {@see 'stylesheet_directory_uri'} or {@see 'locale_stylesheet_uri'} filters.

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*

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* If you want to change the location of the stylesheet files for the entire

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* WordPress workflow, then change the former. If you just have the locale in a

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* separate folder, then change the latter.

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*

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* @since 2.1.0

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*

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* @global WP_Locale $wp_locale WordPress date and time locale object.

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*

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* @return string URI to current theme's localized stylesheet.

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*/

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function get_locale_stylesheet_uri() {

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global $wp_locale;

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$stylesheet_dir_uri = get_stylesheet_directory_uri();

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$dir = get_stylesheet_directory();

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$locale = get_locale();

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if ( file_exists( "$dir/$locale.css" ) ) {

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$stylesheet_uri = "$stylesheet_dir_uri/$locale.css";

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} elseif ( ! empty( $wp_locale->text_direction ) && file_exists( "$dir/{$wp_locale->text_direction}.css" ) ) {

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$stylesheet_uri = "$stylesheet_dir_uri/{$wp_locale->text_direction}.css";

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} else {

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$stylesheet_uri = '';

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}

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/**

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* Filters the localized stylesheet URI.

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*

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* @since 2.1.0

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*

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* @param string $stylesheet_uri Localized stylesheet URI.

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* @param string $stylesheet_dir_uri Stylesheet directory URI.

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*/

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return apply_filters( 'locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );

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}

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/**

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* Retrieves name of the current theme.

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*

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* @since 1.5.0

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*

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* @return string Template name.

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*/

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function get_template() {

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/**

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* Filters the name of the current theme.

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*

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* @since 1.5.0

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*

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* @param string $template Current theme's directory name.

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*/

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return apply_filters( 'template', get_option( 'template' ) );

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}

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/**

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* Retrieves template directory path for current theme.

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*

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* @since 1.5.0

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*

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* @return string Path to current theme's template directory.

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*/

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function get_template_directory() {

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$template = get_template();

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$theme_root = get_theme_root( $template );

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$template_dir = "$theme_root/$template";

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/**

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* Filters the current theme directory path.

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*

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* @since 1.5.0

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*

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* @param string $template_dir The path of the current theme directory.

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* @param string $template Directory name of the current theme.

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* @param string $theme_root Absolute path to the themes directory.

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*/

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return apply_filters( 'template_directory', $template_dir, $template, $theme_root );

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}

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/**

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* Retrieves template directory URI for current theme.

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*

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* @since 1.5.0

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*

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* @return string URI to current theme's template directory.

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*/

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function get_template_directory_uri() {

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$template = str_replace( '%2F', '/', rawurlencode( get_template() ) );

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$theme_root_uri = get_theme_root_uri( $template );

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$template_dir_uri = "$theme_root_uri/$template";

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/**

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* Filters the current theme directory URI.

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*

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* @since 1.5.0

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*

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* @param string $template_dir_uri The URI of the current theme directory.

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* @param string $template Directory name of the current theme.

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* @param string $theme_root_uri The themes root URI.

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*/

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return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri );

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}

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/**

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* Retrieves theme roots.

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*

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* @since 2.9.0

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*

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* @global array $wp_theme_directories

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*

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* @return array|string An array of theme roots keyed by template/stylesheet

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* or a single theme root if all themes have the same root.

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*/

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function get_theme_roots() {

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global $wp_theme_directories;

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if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) {

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return '/themes';

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}

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$theme_roots = get_site_transient( 'theme_roots' );

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if ( false === $theme_roots ) {

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search_theme_directories( true ); // Regenerate the transient.

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$theme_roots = get_site_transient( 'theme_roots' );

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}

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return $theme_roots;

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}

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/**

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* Registers a directory that contains themes.

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*

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* @since 2.9.0

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*

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* @global array $wp_theme_directories

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*

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* @param string $directory Either the full filesystem path to a theme folder

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* or a folder within WP_CONTENT_DIR.

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* @return bool True if successfully registered a directory that contains themes,

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* false if the directory does not exist.

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*/

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function register_theme_directory( $directory ) {

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global $wp_theme_directories;

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if ( ! file_exists( $directory ) ) {

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// Try prepending as the theme directory could be relative to the content directory.

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$directory = WP_CONTENT_DIR . '/' . $directory;

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// If this directory does not exist, return and do not register.

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if ( ! file_exists( $directory ) ) {

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return false;

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}

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}

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if ( ! is_array( $wp_theme_directories ) ) {

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$wp_theme_directories = array();

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}

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$untrailed = untrailingslashit( $directory );

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if ( ! empty( $untrailed ) && ! in_array( $untrailed, $wp_theme_directories, true ) ) {

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$wp_theme_directories[] = $untrailed;

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}

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return true;

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}

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/**

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* Searches all registered theme directories for complete and valid themes.

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*

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* @since 2.9.0

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*

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* @global array $wp_theme_directories

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*

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* @param bool $force Optional. Whether to force a new directory scan. Default false.

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* @return array|false Valid themes found on success, false on failure.

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*/

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function search_theme_directories( $force = false ) {

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global $wp_theme_directories;

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static $found_themes = null;

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if ( empty( $wp_theme_directories ) ) {

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return false;

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}

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if ( ! $force && isset( $found_themes ) ) {

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return $found_themes;

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}

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$found_themes = array();

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$wp_theme_directories = (array) $wp_theme_directories;

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$relative_theme_roots = array();

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/*

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* Set up maybe-relative, maybe-absolute array of theme directories.

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* We always want to return absolute, but we need to cache relative

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* to use in get_theme_root().

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*/

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foreach ( $wp_theme_directories as $theme_root ) {

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if ( 0 === strpos( $theme_root, WP_CONTENT_DIR ) ) {

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$relative_theme_roots[ str_replace( WP_CONTENT_DIR, '', $theme_root ) ] = $theme_root;

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} else {

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$relative_theme_roots[ $theme_root ] = $theme_root;

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}

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}

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/**

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* Filters whether to get the cache of the registered theme directories.

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*

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* @since 3.4.0

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*

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* @param bool $cache_expiration Whether to get the cache of the theme directories. Default false.

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* @param string $context The class or function name calling the filter.

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*/

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$cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' );

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if ( $cache_expiration ) {

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$cached_roots = get_site_transient( 'theme_roots' );

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if ( is_array( $cached_roots ) ) {

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foreach ( $cached_roots as $theme_dir => $theme_root ) {

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// A cached theme root is no longer around, so skip it.

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if ( ! isset( $relative_theme_roots[ $theme_root ] ) ) {

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continue;

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}

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$found_themes[ $theme_dir ] = array(

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'theme_file' => $theme_dir . '/style.css',

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'theme_root' => $relative_theme_roots[ $theme_root ], // Convert relative to absolute.

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);

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}

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return $found_themes;

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}

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if ( ! is_int( $cache_expiration ) ) {

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$cache_expiration = 30 * MINUTE_IN_SECONDS;

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}

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} else {

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$cache_expiration = 30 * MINUTE_IN_SECONDS;

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}

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/* Loop the registered theme directories and extract all themes */

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foreach ( $wp_theme_directories as $theme_root ) {

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