Question

WP_Theme

WP_Theme Class

---

description

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源代码

File: wp-includes/class-wp-theme.php

final class WP_Theme implements ArrayAccess {

	/**
	 * Whether the theme has been marked as updateable.
	 *
	 * @since 4.4.0
	 * @access public
	 * @var bool
	 *
	 * @see WP_MS_Themes_List_Table
	 */
	public $update = false;

	/**
	 * Headers for style.css files.
	 *
	 * @static
	 * @access private
	 * @var array
	 */
	private static $file_headers = array(
		'Name'        => 'Theme Name',
		'ThemeURI'    => 'Theme URI',
		'description' => 'description',
		'Author'      => 'Author',
		'AuthorURI'   => 'Author URI',
		'Version'     => 'Version',
		'Template'    => 'Template',
		'Status'      => 'Status',
		'Tags'        => 'Tags',
		'TextDomain'  => 'Text Domain',
		'DomainPath'  => 'Domain Path',
	);

	/**
	 * Default themes.
	 *
	 * @static
	 * @access private
	 * @var array
	 */
	private static $default_themes = array(
		'classic'         => 'WordPress Classic',
		'default'         => 'WordPress Default',
		'twentyten'       => 'Twenty Ten',
		'twentyeleven'    => 'Twenty Eleven',
		'twentytwelve'    => 'Twenty Twelve',
		'twentythirteen'  => 'Twenty Thirteen',
		'twentyfourteen'  => 'Twenty Fourteen',
		'twentyfifteen'   => 'Twenty Fifteen',
		'twentysixteen'   => 'Twenty Sixteen',
		'twentyseventeen' => 'Twenty Seventeen',
	);

	/**
	 * Renamed theme tags.
	 *
	 * @static
	 * @access private
	 * @var array
	 */
	private static $tag_map = array(
		'fixed-width'    => 'fixed-layout',
		'flexible-width' => 'fluid-layout',
	);

	/**
	 * Absolute path to the theme root, usually wp-content/themes
	 *
	 * @access private
	 * @var string
	 */
	private $theme_root;

	/**
	 * Header data from the theme's style.css file.
	 *
	 * @access private
	 * @var array
	 */
	private $headers = array();

	/**
	 * Header data from the theme's style.css file after being sanitized.
	 *
	 * @access private
	 * @var array
	 */
	private $headers_sanitized;

	/**
	 * Header name from the theme's style.css after being translated.
	 *
	 * Cached due to sorting functions running over the translated name.
	 *
	 * @access private
	 * @var string
	 */
	private $name_translated;

	/**
	 * Errors encountered when initializing the theme.
	 *
	 * @access private
	 * @var WP_Error
	 */
	private $errors;

	/**
	 * The directory name of the theme's files, inside the theme root.
	 *
	 * In the case of a child theme, this is directory name of the child theme.
	 * Otherwise, 'stylesheet' is the same as 'template'.
	 *
	 * @access private
	 * @var string
	 */
	private $stylesheet;

	/**
	 * The directory name of the theme's files, inside the theme root.
	 *
	 * In the case of a child theme, this is the directory name of the parent theme.
	 * Otherwise, 'template' is the same as 'stylesheet'.
	 *
	 * @access private
	 * @var string
	 */
	private $template;

	/**
	 * A reference to the parent theme, in the case of a child theme.
	 *
	 * @access private
	 * @var WP_Theme
	 */
	private $parent;

	/**
	 * URL to the theme root, usually an absolute URL to wp-content/themes
	 *
	 * @access private
	 * @var string
	 */
	private $theme_root_uri;

	/**
	 * Flag for whether the theme's textdomain is loaded.
	 *
	 * @access private
	 * @var bool
	 */
	private $textdomain_loaded;

	/**
	 * Stores an md5 hash of the theme root, to function as the cache key.
	 *
	 * @access private
	 * @var string
	 */
	private $cache_hash;

	/**
	 * Flag for whether the themes cache bucket should be persistently cached.
	 *
	 * Default is false. Can be set with the {@see 'wp_cache_themes_persistently'} filter.
	 *
	 * @static
	 * @access private
	 * @var bool
	 */
	private static $persistently_cache;

	/**
	 * Expiration time for the themes cache bucket.
	 *
	 * By default the bucket is not cached, so this value is useless.
	 *
	 * @static
	 * @access private
	 * @var bool
	 */
	private static $cache_expiration = 1800;

	/**
	 * Constructor for WP_Theme.
	 *
	 * @since  3.4.0
	 *
	 * @global array $wp_theme_directories
	 *
	 * @param string $theme_dir Directory of the theme within the theme_root.
	 * @param string $theme_root Theme root.
	 * @param WP_Error|void $_child If this theme is a parent theme, the child may be passed for validation purposes.
	 */
	public function __construct( $theme_dir, $theme_root, $_child = null ) {
		global $wp_theme_directories;

		// Initialize caching on first run.
		if ( ! isset( self::$persistently_cache ) ) {
			/** This action is documented in wp-includes/theme.php */
			self::$persistently_cache = apply_filters( 'wp_cache_themes_persistently', false, 'WP_Theme' );
			if ( self::$persistently_cache ) {
				wp_cache_add_global_groups( 'themes' );
				if ( is_int( self::$persistently_cache ) )
					self::$cache_expiration = self::$persistently_cache;
			} else {
				wp_cache_add_non_persistent_groups( 'themes' );
			}
		}

		$this->theme_root = $theme_root;
		$this->stylesheet = $theme_dir;

		// Correct a situation where the theme is 'some-directory/some-theme' but 'some-directory' was passed in as part of the theme root instead.
		if ( ! in_array( $theme_root, (array) $wp_theme_directories ) && in_array( dirname( $theme_root ), (array) $wp_theme_directories ) ) {
			$this->stylesheet = basename( $this->theme_root ) . '/' . $this->stylesheet;
			$this->theme_root = dirname( $theme_root );
		}

		$this->cache_hash = md5( $this->theme_root . '/' . $this->stylesheet );
		$theme_file = $this->stylesheet . '/style.css';

		$cache = $this->cache_get( 'theme' );

		if ( is_array( $cache ) ) {
			foreach ( array( 'errors', 'headers', 'template' ) as $key ) {
				if ( isset( $cache[ $key ] ) )
					$this->$key = $cache[ $key ];
			}
			if ( $this->errors )
				return;
			if ( isset( $cache['theme_root_template'] ) )
				$theme_root_template = $cache['theme_root_template'];
		} elseif ( ! file_exists( $this->theme_root . '/' . $theme_file ) ) {
			$this->headers['Name'] = $this->stylesheet;
			if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet ) )
				$this->errors = new WP_Error( 'theme_not_found', sprintf( __( 'The theme directory "%s" does not exist.' ), esc_html( $this->stylesheet ) ) );
			else
				$this->errors = new WP_Error( 'theme_no_stylesheet', __( 'Stylesheet is missing.' ) );
			$this->template = $this->stylesheet;
			$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
			if ( ! file_exists( $this->theme_root ) ) // Don't cache this one.
				$this->errors->add( 'theme_root_missing', __( 'ERROR: The themes directory is either empty or doesn’t exist. Please check your installation.' ) );
			return;
		} elseif ( ! is_readable( $this->theme_root . '/' . $theme_file ) ) {
			$this->headers['Name'] = $this->stylesheet;
			$this->errors = new WP_Error( 'theme_stylesheet_not_readable', __( 'Stylesheet is not readable.' ) );
			$this->template = $this->stylesheet;
			$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
			return;
		} else {
			$this->headers = get_file_data( $this->theme_root . '/' . $theme_file, self::$file_headers, 'theme' );
			// Default themes always trump their pretenders.
			// Properly identify default themes that are inside a directory within wp-content/themes.
			if ( $default_theme_slug = array_search( $this->headers['Name'], self::$default_themes ) ) {
				if ( basename( $this->stylesheet ) != $default_theme_slug )
					$this->headers['Name'] .= '/' . $this->stylesheet;
			}
		}

		// (If template is set from cache [and there are no errors], we know it's good.)
		if ( ! $this->template && ! ( $this->template = $this->headers['Template'] ) ) {
			$this->template = $this->stylesheet;
			if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet . '/index.php' ) ) {
				$error_message = sprintf(
					/* translators: 1: index.php, 2: Codex URL, 3: style.css */
					__( 'Template is missing. Standalone themes need to have a %1$s template file. <a href="%2$s">Child themes</a> need to have a Template header in the %3$s stylesheet.' ),
					'<code>index.php</code>',
					__( 'https://codex.wordpress.org/Child_Themes' ),
					'<code>style.css</code>'
				);
				$this->errors = new WP_Error( 'theme_no_index', $error_message );
				$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
				return;
			}
		}

		// If we got our data from cache, we can assume that 'template' is pointing to the right place.
		if ( ! is_array( $cache ) && $this->template != $this->stylesheet && ! file_exists( $this->theme_root . '/' . $this->template . '/index.php' ) ) {
			// If we're in a directory of themes inside /themes, look for the parent nearby.
			// wp-content/themes/directory-of-themes/*
			$parent_dir = dirname( $this->stylesheet );
			if ( '.' != $parent_dir && file_exists( $this->theme_root . '/' . $parent_dir . '/' . $this->template . '/index.php' ) ) {
				$this->template = $parent_dir . '/' . $this->template;
			} elseif ( ( $directories = search_theme_directories() ) && isset( $directories[ $this->template ] ) ) {
				// Look for the template in the search_theme_directories() results, in case it is in another theme root.
				// We don't look into directories of themes, just the theme root.
				$theme_root_template = $directories[ $this->template ]['theme_root'];
			} else {
				// Parent theme is missing.
				$this->errors = new WP_Error( 'theme_no_parent', sprintf( __( 'The parent theme is missing. Please install the "%s" parent theme.' ), esc_html( $this->template ) ) );
				$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
				$this->parent = new WP_Theme( $this->template, $this->theme_root, $this );
				return;
			}
		}

		// Set the parent, if we're a child theme.
		if ( $this->template != $this->stylesheet ) {
			// If we are a parent, then there is a problem. Only two generations allowed! Cancel things out.
			if ( $_child instanceof WP_Theme && $_child->template == $this->stylesheet ) {
				$_child->parent = null;
				$_child->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), esc_html( $_child->template ) ) );
				$_child->cache_add( 'theme', array( 'headers' => $_child->headers, 'errors' => $_child->errors, 'stylesheet' => $_child->stylesheet, 'template' => $_child->template ) );
				// The two themes actually reference each other with the Template header.
				if ( $_child->stylesheet == $this->template ) {
					$this->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), esc_html( $this->template ) ) );
					$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
				}
				return;
			}
			// Set the parent. Pass the current instance so we can do the crazy checks above and assess errors.
			$this->parent = new WP_Theme( $this->template, isset( $theme_root_template ) ? $theme_root_template : $this->theme_root, $this );
		}

		// We're good. If we didn't retrieve from cache, set it.
		if ( ! is_array( $cache ) ) {
			$cache = array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template );
			// If the parent theme is in another root, we'll want to cache this. Avoids an entire branch of filesystem calls above.
			if ( isset( $theme_root_template ) )
				$cache['theme_root_template'] = $theme_root_template;
			$this->cache_add( 'theme', $cache );
		}
	}

	/**
	 * When converting the object to a string, the theme name is returned.
	 *
	 * @since  3.4.0
	 *
	 * @return string Theme name, ready for display (translated)
	 */
	public function __toString() {
		return (string) $this->display('Name');
	}

	/**
	 * __isset() magic method for properties formerly returned by current_theme_info()
	 *
	 * @staticvar array $properties
	 *
	 * @since  3.4.0
	 *
	 * @param string $offset Property to check if set.
	 * @return bool Whether the given property is set.
	 */
	public function __isset( $offset ) {
		static $properties = array(
			'name', 'title', 'version', 'parent_theme', 'template_dir', 'stylesheet_dir', 'template', 'stylesheet',
			'screenshot', 'description', 'author', 'tags', 'theme_root', 'theme_root_uri',
		);

		return in_array( $offset, $properties );
	}

	/**
	 * __get() magic method for properties formerly returned by current_theme_info()
	 *
	 * @since  3.4.0
	 *
	 * @param string $offset Property to get.
	 * @return mixed Property value.
	 */
	public function __get( $offset ) {
		switch ( $offset ) {
			case 'name' :
			case 'title' :
				return $this->get('Name');
			case 'version' :
				return $this->get('Version');
			case 'parent_theme' :
				return $this->parent() ? $this->parent()->get('Name') : '';
			case 'template_dir' :
				return $this->get_template_directory();
			case 'stylesheet_dir' :
				return $this->get_stylesheet_directory();
			case 'template' :
				return $this->get_template();
			case 'stylesheet' :
				return $this->get_stylesheet();
			case 'screenshot' :
				return $this->get_screenshot( 'relative' );
			// 'author' and 'description' did not previously return translated data.
			case 'description' :
				return $this->display('description');
			case 'author' :
				return $this->display('Author');
			case 'tags' :
				return $this->get( 'Tags' );
			case 'theme_root' :
				return $this->get_theme_root();
			case 'theme_root_uri' :
				return $this->get_theme_root_uri();
			// For cases where the array was converted to an object.
			default :
				return $this->offsetGet( $offset );
		}
	}

	/**
	 * Method to implement ArrayAccess for keys formerly returned by get_themes()
	 *
	 * @since  3.4.0
	 *
	 * @param mixed $offset
	 * @param mixed $value
	 */
	public function offsetSet( $offset, $value ) {}

	/**
	 * Method to implement ArrayAccess for keys formerly returned by get_themes()
	 *
	 * @since  3.4.0
	 *
	 * @param mixed $offset
	 */
	public function offsetUnset( $offset ) {}

	/**
	 * Method to implement ArrayAccess for keys formerly returned by get_themes()
	 *
	 * @staticvar array $keys
	 *
	 * @since  3.4.0
	 *
	 * @param mixed $offset
	 * @return bool
	 */
	public function offsetExists( $offset ) {
		static $keys = array(
			'Name', 'Version', 'Status', 'Title', 'Author', 'Author Name', 'Author URI', 'description',
			'Template', 'Stylesheet', 'Template Files', 'Stylesheet Files', 'Template Dir', 'Stylesheet Dir',
			'Screenshot', 'Tags', 'Theme Root', 'Theme Root URI', 'Parent Theme',
		);

		return in_array( $offset, $keys );
	}

	/**
	 * Method to implement ArrayAccess for keys formerly returned by get_themes().
	 *
	 * Author, Author Name, Author URI, and description did not previously return
	 * translated data. We are doing so now as it is safe to do. However, as
	 * Name and Title could have been used as the key for get_themes(), both remain
	 * untranslated for back compatibility. This means that ['Name'] is not ideal,
	 * and care should be taken to use `$theme::display( 'Name' )` to get a properly
	 * translated header.
	 *
	 * @since  3.4.0
	 *
	 * @param mixed $offset
	 * @return mixed
	 */
	public function offsetGet( $offset ) {
		switch ( $offset ) {
			case 'Name' :
			case 'Title' :
				/*
				 * See note above about using translated data. get() is not ideal.
				 * It is only for backward compatibility. Use display().
				 */
				return $this->get('Name');
			case 'Author' :
				return $this->display( 'Author');
			case 'Author Name' :
				return $this->display( 'Author', false);
			case 'Author URI' :
				return $this->display('AuthorURI');
			case 'description' :
				return $this->display( 'description');
			case 'Version' :
			case 'Status' :
				return $this->get( $offset );
			case 'Template' :
				return $this->get_template();
			case 'Stylesheet' :
				return $this->get_stylesheet();
			case 'Template Files' :
				return $this->get_files( 'php', 1, true );
			case 'Stylesheet Files' :
				return $this->get_files( 'css', 0, false );
			case 'Template Dir' :
				return $this->get_template_directory();
			case 'Stylesheet Dir' :
				return $this->get_stylesheet_directory();
			case 'Screenshot' :
				return $this->get_screenshot( 'relative' );
			case 'Tags' :
				return $this->get('Tags');
			case 'Theme Root' :
				return $this->get_theme_root();
			case 'Theme Root URI' :
				return $this->get_theme_root_uri();
			case 'Parent Theme' :
				return $this->parent() ? $this->parent()->get('Name') : '';
			default :
				return null;
		}
	}

	/**
	 * Returns errors property.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return WP_Error|false WP_Error if there are errors, or false.
	 */
	public function errors() {
		return is_wp_error( $this->errors ) ? $this->errors : false;
	}

	/**
	 * Whether the theme exists.
	 *
	 * A theme with errors exists. A theme with the error of 'theme_not_found',
	 * meaning that the theme's directory was not found, does not exist.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return bool Whether the theme exists.
	 */
	public function exists() {
		return ! ( $this->errors() && in_array( 'theme_not_found', $this->errors()->get_error_codes() ) );
	}

	/**
	 * Returns reference to the parent theme.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return WP_Theme|false Parent theme, or false if the current theme is not a child theme.
	 */
	public function parent() {
		return isset( $this->parent ) ? $this->parent : false;
	}

	/**
	 * Adds theme data to cache.
	 *
	 * Cache entries keyed by the theme and the type of data.
	 *
	 * @since 3.4.0
	 * @access private
	 *
	 * @param string $key Type of data to store (theme, screenshot, headers, post_templates)
	 * @param string $data Data to store
	 * @return bool Return value from wp_cache_add()
	 */
	private function cache_add( $key, $data ) {
		return wp_cache_add( $key . '-' . $this->cache_hash, $data, 'themes', self::$cache_expiration );
	}

	/**
	 * Gets theme data from cache.
	 *
	 * Cache entries are keyed by the theme and the type of data.
	 *
	 * @since 3.4.0
	 * @access private
	 *
	 * @param string $key Type of data to retrieve (theme, screenshot, headers, post_templates)
	 * @return mixed Retrieved data
	 */
	private function cache_get( $key ) {
		return wp_cache_get( $key . '-' . $this->cache_hash, 'themes' );
	}

	/**
	 * Clears the cache for the theme.
	 *
	 * @since 3.4.0
	 * @access public
	 */
	public function cache_delete() {
		foreach ( array( 'theme', 'screenshot', 'headers', 'post_templates' ) as $key )
			wp_cache_delete( $key . '-' . $this->cache_hash, 'themes' );
		$this->template = $this->textdomain_loaded = $this->theme_root_uri = $this->parent = $this->errors = $this->headers_sanitized = $this->name_translated = null;
		$this->headers = array();
		$this->__construct( $this->stylesheet, $this->theme_root );
	}

	/**
	 * Get a raw, unformatted theme header.
	 *
	 * The header is sanitized, but is not translated, and is not marked up for display.
	 * To get a theme header for display, use the display() method.
	 *
	 * Use the get_template() method, not the 'Template' header, for finding the template.
	 * The 'Template' header is only good for what was written in the style.css, while
	 * get_template() takes into account where WordPress actually located the theme and
	 * whether it is actually valid.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @param string $header Theme header. Name, description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
	 * @return string|false String on success, false on failure.
	 */
	public function get( $header ) {
		if ( ! isset( $this->headers[ $header ] ) )
			return false;

		if ( ! isset( $this->headers_sanitized ) ) {
			$this->headers_sanitized = $this->cache_get( 'headers' );
			if ( ! is_array( $this->headers_sanitized ) )
				$this->headers_sanitized = array();
		}

		if ( isset( $this->headers_sanitized[ $header ] ) )
			return $this->headers_sanitized[ $header ];

		// If themes are a persistent group, sanitize everything and cache it. One cache add is better than many cache sets.
		if ( self::$persistently_cache ) {
			foreach ( array_keys( $this->headers ) as $_header )
				$this->headers_sanitized[ $_header ] = $this->sanitize_header( $_header, $this->headers[ $_header ] );
			$this->cache_add( 'headers', $this->headers_sanitized );
		} else {
			$this->headers_sanitized[ $header ] = $this->sanitize_header( $header, $this->headers[ $header ] );
		}

		return $this->headers_sanitized[ $header ];
	}

	/**
	 * Gets a theme header, formatted and translated for display.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @param string $header Theme header. Name, description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
	 * @param bool $markup Optional. Whether to mark up the header. Defaults to true.
	 * @param bool $translate Optional. Whether to translate the header. Defaults to true.
	 * @return string|false Processed header, false on failure.
	 */
	public function display( $header, $markup = true, $translate = true ) {
		$value = $this->get( $header );
		if ( false === $value ) {
			return false;
		}

		if ( $translate && ( empty( $value ) || ! $this->load_textdomain() ) )
			$translate = false;

		if ( $translate )
			$value = $this->translate_header( $header, $value );

		if ( $markup )
			$value = $this->markup_header( $header, $value, $translate );

		return $value;
	}

	/**
	 * Sanitize a theme header.
	 *
	 * @since 3.4.0
	 * @access private
	 *
	 * @staticvar array $header_tags
	 * @staticvar array $header_tags_with_a
	 *
	 * @param string $header Theme header. Name, description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
	 * @param string $value Value to sanitize.
	 * @return mixed
	 */
	private function sanitize_header( $header, $value ) {
		switch ( $header ) {
			case 'Status' :
				if ( ! $value ) {
					$value = 'publish';
					break;
				}
				// Fall through otherwise.
			case 'Name' :
				static $header_tags = array(
					'abbr'    => array( 'title' => true ),
					'acronym' => array( 'title' => true ),
					'code'    => true,
					'em'      => true,
					'strong'  => true,
				);
				$value = wp_kses( $value, $header_tags );
				break;
			case 'Author' :
				// There shouldn't be anchor tags in Author, but some themes like to be challenging.
			case 'description' :
				static $header_tags_with_a = array(
					'a'       => array( 'href' => true, 'title' => true ),
					'abbr'    => array( 'title' => true ),
					'acronym' => array( 'title' => true ),
					'code'    => true,
					'em'      => true,
					'strong'  => true,
				);
				$value = wp_kses( $value, $header_tags_with_a );
				break;
			case 'ThemeURI' :
			case 'AuthorURI' :
				$value = esc_url_raw( $value );
				break;
			case 'Tags' :
				$value = array_filter( array_map( 'trim', explode( ',', strip_tags( $value ) ) ) );
				break;
			case 'Version' :
				$value = strip_tags( $value );
				break;
		}

		return $value;
	}

	/**
	 * Mark up a theme header.
	 *
     * @since 3.4.0
	 * @access private
	 *
	 * @staticvar string $comma
	 *
	 * @param string $header Theme header. Name, description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
	 * @param string $value Value to mark up.
	 * @param string $translate Whether the header has been translated.
	 * @return string Value, marked up.
	 */
	private function markup_header( $header, $value, $translate ) {
		switch ( $header ) {
			case 'Name' :
				if ( empty( $value ) ) {
					$value = esc_html( $this->get_stylesheet() );
				}
				break;
			case 'description' :
				$value = wptexturize( $value );
				break;
			case 'Author' :
				if ( $this->get('AuthorURI') ) {
					$value = sprintf( '<a href="%1$s">%2$s</a>', $this->display( 'AuthorURI', true, $translate ), $value );
				} elseif ( ! $value ) {
					$value = __( 'Anonymous' );
				}
				break;
			case 'Tags' :
				static $comma = null;
				if ( ! isset( $comma ) ) {
					/* translators: used between list items, there is a space after the comma */
					$comma = __( ', ' );
				}
				$value = implode( $comma, $value );
				break;
			case 'ThemeURI' :
			case 'AuthorURI' :
				$value = esc_url( $value );
				break;
		}

		return $value;
	}

	/**
	 * Translate a theme header.
	 *
	 * @since 3.4.0
	 * @access private
	 *
	 * @staticvar array $tags_list
	 *
	 * @param string $header Theme header. Name, description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
	 * @param string $value Value to translate.
	 * @return string Translated value.
	 */
	private function translate_header( $header, $value ) {
		switch ( $header ) {
			case 'Name' :
				// Cached for sorting reasons.
				if ( isset( $this->name_translated ) )
					return $this->name_translated;
				$this->name_translated = translate( $value, $this->get('TextDomain' ) );
				return $this->name_translated;
			case 'Tags' :
				if ( empty( $value ) || ! function_exists( 'get_theme_feature_list' ) ) {
					return $value;
				}

				static $tags_list;
				if ( ! isset( $tags_list ) ) {
					$tags_list = array(
// As of 4.6, deprecated tags which are only used to provide translation for older themes.
'black' => __( 'Black' ), 'blue' => __( 'Blue' ), 'brown'  => __( 'Brown' ),
'gray' => __( 'Gray' ), 'green'  => __( 'Green' ), 'orange' => __( 'Orange' ),
'pink' => __( 'Pink' ), 'purple' => __( 'Purple' ), 'red' => __( 'Red' ),
'silver' => __( 'Silver' ), 'tan' => __( 'Tan' ), 'white' => __( 'White' ),
'yellow' => __( 'Yellow' ), 'dark' => __( 'Dark' ), 'light' => __( 'Light' ),
'fixed-layout' => __( 'Fixed Layout' ), 'fluid-layout' => __( 'Fluid Layout' ),
'responsive-layout' => __( 'Responsive Layout' ), 'blavatar' => __( 'Blavatar' ),
'photoblogging' => __( 'Photoblogging' ), 'seasonal' => __( 'Seasonal' ),
					);

					$feature_list = get_theme_feature_list( false ); // No API
					foreach ( $feature_list as $tags ) {
$tags_list += $tags;
					}
				}

				foreach ( $value as &$tag ) {
					if ( isset( $tags_list[ $tag ] ) ) {
$tag = $tags_list[ $tag ];
					} elseif ( isset( self::$tag_map[ $tag ] ) ) {
$tag = $tags_list[ self::$tag_map[ $tag ] ];
					}
				}

				return $value;

			default :
				$value = translate( $value, $this->get('TextDomain') );
		}
		return $value;
	}

	/**
	 * The directory name of the theme's "stylesheet" files, inside the theme root.
	 *
	 * In the case of a child theme, this is directory name of the child theme.
	 * Otherwise, get_stylesheet() is the same as get_template().
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Stylesheet
	 */
	public function get_stylesheet() {
		return $this->stylesheet;
	}

	/**
	 * The directory name of the theme's "template" files, inside the theme root.
	 *
	 * In the case of a child theme, this is the directory name of the parent theme.
	 * Otherwise, the get_template() is the same as get_stylesheet().
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Template
	 */
	public function get_template() {
		return $this->template;
	}

	/**
	 * Returns the absolute path to the directory of a theme's "stylesheet" files.
	 *
	 * In the case of a child theme, this is the absolute path to the directory
	 * of the child theme's files.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Absolute path of the stylesheet directory.
	 */
	public function get_stylesheet_directory() {
		if ( $this->errors() && in_array( 'theme_root_missing', $this->errors()->get_error_codes() ) )
			return '';

		return $this->theme_root . '/' . $this->stylesheet;
	}

	/**
	 * Returns the absolute path to the directory of a theme's "template" files.
	 *
	 * In the case of a child theme, this is the absolute path to the directory
	 * of the parent theme's files.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Absolute path of the template directory.
	 */
	public function get_template_directory() {
		if ( $this->parent() )
			$theme_root = $this->parent()->theme_root;
		else
			$theme_root = $this->theme_root;

		return $theme_root . '/' . $this->template;
	}

	/**
	 * Returns the URL to the directory of a theme's "stylesheet" files.
	 *
	 * In the case of a child theme, this is the URL to the directory of the
	 * child theme's files.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string URL to the stylesheet directory.
	 */
	public function get_stylesheet_directory_uri() {
		return $this->get_theme_root_uri() . '/' . str_replace( '%2F', '/', rawurlencode( $this->stylesheet ) );
	}

	/**
	 * Returns the URL to the directory of a theme's "template" files.
	 *
	 * In the case of a child theme, this is the URL to the directory of the
	 * parent theme's files.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string URL to the template directory.
	 */
	public function get_template_directory_uri() {
		if ( $this->parent() )
			$theme_root_uri = $this->parent()->get_theme_root_uri();
		else
			$theme_root_uri = $this->get_theme_root_uri();

		return $theme_root_uri . '/' . str_replace( '%2F', '/', rawurlencode( $this->template ) );
	}

	/**
	 * The absolute path to the directory of the theme root.
	 *
	 * This is typically the absolute path to wp-content/themes.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Theme root.
	 */
	public function get_theme_root() {
		return $this->theme_root;
	}

	/**
	 * Returns the URL to the directory of the theme root.
	 *
	 * This is typically the absolute URL to wp-content/themes. This forms the basis
	 * for all other URLs returned by WP_Theme, so we pass it to the public function
	 * get_theme_root_uri() and allow it to run the {@see 'theme_root_uri'} filter.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return string Theme root URI.
	 */
	public function get_theme_root_uri() {
		if ( ! isset( $this->theme_root_uri ) )
			$this->theme_root_uri = get_theme_root_uri( $this->stylesheet, $this->theme_root );
		return $this->theme_root_uri;
	}

	/**
	 * Returns the main screenshot file for the theme.
	 *
	 * The main screenshot is called screenshot.png. gif and jpg extensions are also allowed.
	 *
	 * Screenshots for a theme must be in the stylesheet directory. (In the case of child
	 * themes, parent theme screenshots are not inherited.)
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @param string $uri Type of URL to return, either 'relative' or an absolute URI. Defaults to absolute URI.
	 * @return string|false Screenshot file. False if the theme does not have a screenshot.
	 */
	public function get_screenshot( $uri = 'uri' ) {
		$screenshot = $this->cache_get( 'screenshot' );
		if ( $screenshot ) {
			if ( 'relative' == $uri )
				return $screenshot;
			return $this->get_stylesheet_directory_uri() . '/' . $screenshot;
		} elseif ( 0 === $screenshot ) {
			return false;
		}

		foreach ( array( 'png', 'gif', 'jpg', 'jpeg' ) as $ext ) {
			if ( file_exists( $this->get_stylesheet_directory() . "/screenshot.$ext" ) ) {
				$this->cache_add( 'screenshot', 'screenshot.' . $ext );
				if ( 'relative' == $uri )
					return 'screenshot.' . $ext;
				return $this->get_stylesheet_directory_uri() . '/' . 'screenshot.' . $ext;
			}
		}

		$this->cache_add( 'screenshot', 0 );
		return false;
	}

	/**
	 * Return files in the theme's directory.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @param mixed $type Optional. Array of extensions to return. Defaults to all files (null).
	 * @param int $depth Optional. How deep to search for files. Defaults to a flat scan (0 depth). -1 depth is infinite.
	 * @param bool $search_parent Optional. Whether to return parent files. Defaults to false.
	 * @return array Array of files, keyed by the path to the file relative to the theme's directory, with the values
	 * 	             being absolute paths.
	 */
	public function get_files( $type = null, $depth = 0, $search_parent = false ) {
		$files = (array) self::scandir( $this->get_stylesheet_directory(), $type, $depth );

		if ( $search_parent && $this->parent() )
			$files += (array) self::scandir( $this->get_template_directory(), $type, $depth );

		return $files;
	}

	/**
	 * Returns the theme's post templates.
	 *
	 * @since 4.7.0
	 * @access public
	 *
	 * @return array Array of page templates, keyed by filename and post type,
	 *               with the value of the translated header name.
	 */
	public function get_post_templates() {
		// If you screw up your current theme and we invalidate your parent, most things still work. Let it slide.
		if ( $this->errors() && $this->errors()->get_error_codes() !== array( 'theme_parent_invalid' ) ) {
			return array();
		}

		$post_templates = $this->cache_get( 'post_templates' );

		if ( ! is_array( $post_templates ) ) {
			$post_templates = array();

			$files = (array) $this->get_files( 'php', 1 );

			foreach ( $files as $file => $full_path ) {
				if ( ! preg_match( '|Template Name:(.*)$|mi', file_get_contents( $full_path ), $header ) ) {
					continue;
				}

				$types = array( 'page' );
				if ( preg_match( '|Template Post Type:(.*)$|mi', file_get_contents( $full_path ), $type ) ) {
					$types = explode( ',', _cleanup_header_comment( $type[1] ) );
				}

				foreach ( $types as $type ) {
					$type = sanitize_key( $type );
					if ( ! isset( $post_templates[ $type ] ) ) {
$post_templates[ $type ] = array();
					}

					$post_templates[ $type ][ $file ] = _cleanup_header_comment( $header[1] );
				}
			}

			$this->cache_add( 'post_templates', $post_templates );
		}

		if ( $this->load_textdomain() ) {
			foreach ( $post_templates as &$post_type ) {
				foreach ( $post_type as &$post_template ) {
					$post_template = $this->translate_header( 'Template Name', $post_template );
				}
			}
		}

		return $post_templates;
	}

	/**
	 * Returns the theme's post templates for a given post type.
	 *
	 * @since 3.4.0
	 * @since 4.7.0 Added the `$post_type` parameter.
	 * @access public
	 *
	 * @param WP_Post|null $post      Optional. The post being edited, provided for context.
	 * @param string       $post_type Optional. Post type to get the templates for. Default 'page'.
	 *                                If a post is provided, its post type is used.
	 * @return array Array of page templates, keyed by filename, with the value of the translated header name.
	 */
	public function get_page_templates( $post = null, $post_type = 'page' ) {
		if ( $post ) {
			$post_type = get_post_type( $post );
		}

		$post_templates = $this->get_post_templates();
		$post_templates = isset( $post_templates[ $post_type ] ) ? $post_templates[ $post_type ] : array();

		if ( $this->parent() ) {
			$post_templates += $this->parent()->get_page_templates( $post, $post_type );
		}

		/**
		 * Filters list of page templates for a theme.
		 *
		 * The dynamic portion of the hook name, `$post_type`, refers to the post type.
		 *
		 * @since 3.9.0
		 * @since 4.4.0 Converted to allow complete control over the `$page_templates` array.
		 * @since 4.7.0 Added the `$post_type` parameter.
		 *
		 * @param array        $post_templates Array of page templates. Keys are filenames,
		 *                                     values are translated names.
		 * @param WP_Theme     $this           The theme object.
		 * @param WP_Post|null $post           The post being edited, provided for context, or null.
		 * @param string       $post_type      Post type to get the templates for.
		 */
		return (array) apply_filters( "theme_{$post_type}_templates", $post_templates, $this, $post, $post_type );
	}

	/**
	 * Scans a directory for files of a certain extension.
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access private
	 *
	 * @param string            $path          Absolute path to search.
	 * @param array|string|null $extensions    Optional. Array of extensions to find, string of a single extension,
	 *                                         or null for all extensions. Default null.
	 * @param int               $depth         Optional. How many levels deep to search for files. Accepts 0, 1+, or
	 *                                         -1 (infinite depth). Default 0.
	 * @param string            $relative_path Optional. The basename of the absolute path. Used to control the
	 *                                         returned path for the found files, particularly when this function
	 *                                         recurses to lower depths. Default empty.
	 * @return array|false Array of files, keyed by the path to the file relative to the `$path` directory prepended
	 *                     with `$relative_path`, with the values being absolute paths. False otherwise.
	 */
	private static function scandir( $path, $extensions = null, $depth = 0, $relative_path = '' ) {
		if ( ! is_dir( $path ) )
			return false;

		if ( $extensions ) {
			$extensions = (array) $extensions;
			$_extensions = implode( '|', $extensions );
		}

		$relative_path = trailingslashit( $relative_path );
		if ( '/' == $relative_path )
			$relative_path = '';

		$results = scandir( $path );
		$files = array();

		/**
		 * Filters the array of excluded directories and files while scanning theme folder.
		 *
 		 * @since 4.7.4
		 *
		 * @param array $exclusions Array of excluded directories and files.
		 */
		$exclusions = (array) apply_filters( 'theme_scandir_exclusions', array( 'CVS', 'node_modules' ) );

		foreach ( $results as $result ) {
			if ( '.' == $result[0] || in_array( $result, $exclusions, true ) ) {
				continue;
			}
			if ( is_dir( $path . '/' . $result ) ) {
				if ( ! $depth )
					continue;
				$found = self::scandir( $path . '/' . $result, $extensions, $depth - 1 , $relative_path . $result );
				$files = array_merge_recursive( $files, $found );
			} elseif ( ! $extensions || preg_match( '~\.(' . $_extensions . ')$~', $result ) ) {
				$files[ $relative_path . $result ] = $path . '/' . $result;
			}
		}

		return $files;
	}

	/**
	 * Loads the theme's textdomain.
	 *
	 * Translation files are not inherited from the parent theme. Todo: if this fails for the
	 * child theme, it should probably try to load the parent theme's translations.
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @return bool True if the textdomain was successfully loaded or has already been loaded.
	 * 	False if no textdomain was specified in the file headers, or if the domain could not be loaded.
	 */
	public function load_textdomain() {
		if ( isset( $this->textdomain_loaded ) )
			return $this->textdomain_loaded;

		$textdomain = $this->get('TextDomain');
		if ( ! $textdomain ) {
			$this->textdomain_loaded = false;
			return false;
		}

		if ( is_textdomain_loaded( $textdomain ) ) {
			$this->textdomain_loaded = true;
			return true;
		}

		$path = $this->get_stylesheet_directory();
		if ( $domainpath = $this->get('DomainPath') )
			$path .= $domainpath;
		else
			$path .= '/languages';

		$this->textdomain_loaded = load_theme_textdomain( $textdomain, $path );
		return $this->textdomain_loaded;
	}

	/**
	 * Whether the theme is allowed (multisite only).
	 *
	 * @since 3.4.0
	 * @access public
	 *
	 * @param string $check Optional. Whether to check only the 'network'-wide settings, the 'site'
	 * 	settings, or 'both'. Defaults to 'both'.
	 * @param int $blog_id Optional. Ignored if only network-wide settings are checked. Defaults to current site.
	 * @return bool Whether the theme is allowed for the network. Returns true in single-site.
	 */
	public function is_allowed( $check = 'both', $blog_id = null ) {
		if ( ! is_multisite() )
			return true;

		if ( 'both' == $check || 'network' == $check ) {
			$allowed = self::get_allowed_on_network();
			if ( ! empty( $allowed[ $this->get_stylesheet() ] ) )
				return true;
		}

		if ( 'both' == $check || 'site' == $check ) {
			$allowed = self::get_allowed_on_site( $blog_id );
			if ( ! empty( $allowed[ $this->get_stylesheet() ] ) )
				return true;
		}

		return false;
	}

	/**
	 * Determines the latest WordPress default theme that is installed.
	 *
	 * This hits the filesystem.
	 *
	 * @since  4.4.0
	 *
	 * @return WP_Theme|false Object, or false if no theme is installed, which would be bad.
	 */
	public static function get_core_default_theme() {
		foreach ( array_reverse( self::$default_themes ) as $slug => $name ) {
			$theme = wp_get_theme( $slug );
			if ( $theme->exists() ) {
				return $theme;
			}
		}
		return false;
	}

	/**
	 * Returns array of stylesheet names of themes allowed on the site or network.
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access public
	 *
	 * @param int $blog_id Optional. ID of the site. Defaults to the current site.
	 * @return array Array of stylesheet names.
	 */
	public static function get_allowed( $blog_id = null ) {
		/**
		 * Filters the array of themes allowed on the network.
		 *
		 * Site is provided as context so that a list of network allowed themes can
		 * be filtered further.
		 *
		 * @since 4.5.0
		 *
		 * @param array $allowed_themes An array of theme stylesheet names.
		 * @param int   $blog_id        ID of the site.
		 */
		$network = (array) apply_filters( 'network_allowed_themes', self::get_allowed_on_network(), $blog_id );
		return $network + self::get_allowed_on_site( $blog_id );
	}

	/**
	 * Returns array of stylesheet names of themes allowed on the network.
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access public
	 *
	 * @staticvar array $allowed_themes
	 *
	 * @return array Array of stylesheet names.
	 */
	public static function get_allowed_on_network() {
		static $allowed_themes;
		if ( ! isset( $allowed_themes ) ) {
			$allowed_themes = (array) get_site_option( 'allowedthemes' );
		}

		/**
		 * Filters the array of themes allowed on the network.
		 *
		 * @since MU
		 *
		 * @param array $allowed_themes An array of theme stylesheet names.
		 */
		$allowed_themes = apply_filters( 'allowed_themes', $allowed_themes );

		return $allowed_themes;
	}

	/**
	 * Returns array of stylesheet names of themes allowed on the site.
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access public
	 *
	 * @staticvar array $allowed_themes
	 *
	 * @param int $blog_id Optional. ID of the site. Defaults to the current site.
	 * @return array Array of stylesheet names.
	 */
	public static function get_allowed_on_site( $blog_id = null ) {
		static $allowed_themes = array();

		if ( ! $blog_id || ! is_multisite() )
			$blog_id = get_current_blog_id();

		if ( isset( $allowed_themes[ $blog_id ] ) ) {
			/**
			 * Filters the array of themes allowed on the site.
			 *
			 * @since 4.5.0
			 *
			 * @param array $allowed_themes An array of theme stylesheet names.
			 * @param int   $blog_id        ID of the site. Defaults to current site.
			 */
			return (array) apply_filters( 'site_allowed_themes', $allowed_themes[ $blog_id ], $blog_id );
		}

		$current = $blog_id == get_current_blog_id();

		if ( $current ) {
			$allowed_themes[ $blog_id ] = get_option( 'allowedthemes' );
		} else {
			switch_to_blog( $blog_id );
			$allowed_themes[ $blog_id ] = get_option( 'allowedthemes' );
			restore_current_blog();
		}

		// This is all super old MU back compat joy.
		// 'allowedthemes' keys things by stylesheet. 'allowed_themes' keyed things by name.
		if ( false === $allowed_themes[ $blog_id ] ) {
			if ( $current ) {
				$allowed_themes[ $blog_id ] = get_option( 'allowed_themes' );
			} else {
				switch_to_blog( $blog_id );
				$allowed_themes[ $blog_id ] = get_option( 'allowed_themes' );
				restore_current_blog();
			}

			if ( ! is_array( $allowed_themes[ $blog_id ] ) || empty( $allowed_themes[ $blog_id ] ) ) {
				$allowed_themes[ $blog_id ] = array();
			} else {
				$converted = array();
				$themes = wp_get_themes();
				foreach ( $themes as $stylesheet => $theme_data ) {
					if ( isset( $allowed_themes[ $blog_id ][ $theme_data->get('Name') ] ) )
$converted[ $stylesheet ] = true;
				}
				$allowed_themes[ $blog_id ] = $converted;
			}
			// Set the option so we never have to go through this pain again.
			if ( is_admin() && $allowed_themes[ $blog_id ] ) {
				if ( $current ) {
					update_option( 'allowedthemes', $allowed_themes[ $blog_id ] );
					delete_option( 'allowed_themes' );
				} else {
					switch_to_blog( $blog_id );
					update_option( 'allowedthemes', $allowed_themes[ $blog_id ] );
					delete_option( 'allowed_themes' );
					restore_current_blog();
				}
			}
		}

		/** This filter is documented in wp-includes/class-wp-theme.php */
		return (array) apply_filters( 'site_allowed_themes', $allowed_themes[ $blog_id ], $blog_id );
	}

	/**
	 * Enables a theme for all sites on the current network.
	 *
	 * @since 4.6.0
	 * @access public
	 * @static
	 *
	 * @param string|array $stylesheets Stylesheet name or array of stylesheet names.
	 */
	public static function network_enable_theme( $stylesheets ) {
		if ( ! is_multisite() ) {
			return;
		}

		if ( ! is_array( $stylesheets ) ) {
			$stylesheets = array( $stylesheets );
		}

		$allowed_themes = get_site_option( 'allowedthemes' );
		foreach ( $stylesheets as $stylesheet ) {
			$allowed_themes[ $stylesheet ] = true;
		}

		update_site_option( 'allowedthemes', $allowed_themes );
	}

	/**
	 * Disables a theme for all sites on the current network.
	 *
	 * @since 4.6.0
	 * @access public
	 * @static
	 *
	 * @param string|array $stylesheets Stylesheet name or array of stylesheet names.
	 */
	public static function network_disable_theme( $stylesheets ) {
		if ( ! is_multisite() ) {
			return;
		}

		if ( ! is_array( $stylesheets ) ) {
			$stylesheets = array( $stylesheets );
		}

		$allowed_themes = get_site_option( 'allowedthemes' );
		foreach ( $stylesheets as $stylesheet ) {
			if ( isset( $allowed_themes[ $stylesheet ] ) ) {
				unset( $allowed_themes[ $stylesheet ] );
			}
		}

		update_site_option( 'allowedthemes', $allowed_themes );
	}

	/**
	 * Sorts themes by name.
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access public
	 *
	 * @param array $themes Array of themes to sort, passed by reference.
	 */
	public static function sort_by_name( &$themes ) {
		if ( 0 === strpos( get_user_locale(), 'en_' ) ) {
			uasort( $themes, array( 'WP_Theme', '_name_sort' ) );
		} else {
			uasort( $themes, array( 'WP_Theme', '_name_sort_i18n' ) );
		}
	}

	/**
	 * Callback function for usort() to naturally sort themes by name.
	 *
	 * Accesses the Name header directly from the class for maximum speed.
	 * Would choke on HTML but we don't care enough to slow it down with strip_tags().
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access private
	 *
	 * @param string $a First name.
	 * @param string $b Second name.
	 * @return int Negative if `$a` falls lower in the natural order than `$b`. Zero if they fall equally.
	 *             Greater than 0 if `$a` falls higher in the natural order than `$b`. Used with usort().
	 */
	private static function _name_sort( $a, $b ) {
		return strnatcasecmp( $a->headers['Name'], $b->headers['Name'] );
	}

	/**
	 * Name sort (with translation).
	 *
	 * @since 3.4.0
	 *
	 * @static
	 * @access private
	 *
	 * @param string $a First name.
	 * @param string $b Second name.
	 * @return int Negative if `$a` falls lower in the natural order than `$b`. Zero if they fall equally.
	 *             Greater than 0 if `$a` falls higher in the natural order than `$b`. Used with usort().
	 */
	private static function _name_sort_i18n( $a, $b ) {
		// Don't mark up; Do translate.
		return strnatcasecmp( $a->display( 'Name', false, true ), $b->display( 'Name', false, true ) );
	}
}

---

更新日志

Version	description
3.4.0	Introduced.

---

Methods

• __construct Constructor for WP_Theme.
• __get __get() magic method for properties formerly returned by current_theme_info()
• __isset __isset() magic method for properties formerly returned by current_theme_info()
• __toString When converting the object to a string, the theme name is returned.
• _name_sort Callback function for usort() to naturally sort themes by name.
• _name_sort_i18n Name sort (with translation).
• cache_add Adds theme data to cache.
• cache_delete Clears the cache for the theme.
• cache_get Gets theme data from cache.
• display Gets a theme header, formatted and translated for display.
• errors Returns errors property.
• exists Whether the theme exists.
• get Get a raw, unformatted theme header.
• get_allowed Returns array of stylesheet names of themes allowed on the site or network.
• get_allowed_on_network Returns array of stylesheet names of themes allowed on the network.
• get_allowed_on_site Returns array of stylesheet names of themes allowed on the site.
• get_core_default_theme Determines the latest WordPress default theme that is installed.
• get_files Return files in the theme's directory.
• get_page_templates Returns the theme's post templates for a given post type.
• get_post_templates Returns the theme's post templates.
• get_screenshot Returns the main screenshot file for the theme.
• get_stylesheet The directory name of the theme's "stylesheet" files, inside the theme root.
• get_stylesheet_directory Returns the absolute path to the directory of a theme's "stylesheet" files.
• get_stylesheet_directory_uri Returns the URL to the directory of a theme's "stylesheet" files.
• get_template The directory name of the theme's "template" files, inside the theme root.
• get_template_directory Returns the absolute path to the directory of a theme's "template" files.
• get_template_directory_uri Returns the URL to the directory of a theme's "template" files.
• get_theme_root The absolute path to the directory of the theme root.
• get_theme_root_uri Returns the URL to the directory of the theme root.
• is_allowed Whether the theme is allowed (multisite only).
• load_textdomain Loads the theme's textdomain.
• markup_header Mark up a theme header.
• network_disable_theme Disables a theme for all sites on the current network.
• network_enable_theme Enables a theme for all sites on the current network.
• offsetExists Method to implement ArrayAccess for keys formerly returned by get_themes()
• offsetGet Method to implement ArrayAccess for keys formerly returned by get_themes().
• offsetSet Method to implement ArrayAccess for keys formerly returned by get_themes()
• offsetUnset Method to implement ArrayAccess for keys formerly returned by get_themes()
• parent Returns reference to the parent theme.
• sanitize_header Sanitize a theme header.
• scandir Scans a directory for files of a certain extension.
• sort_by_name Sorts themes by name.
• translate_header Translate a theme header.

---

User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note Contributed by Sagar Prajapati

   Get Custom Page Templates

   The following code snippets return all the custom Page Templates available to the currently activated theme as an array. Each array item has a key of the Template Name and value of the filename (or folder-name and filename for custom page templates stored in a theme’s subdirectory).

   
   $templates = wp_get_theme()->get_page_templates();
   foreach ( $templates as $template_name => $template_filename ) {
       echo "$template_name ($template_filename)<br />";
   }
   

   
   print_r( wp_get_theme()->get_page_templates() ); ?>
   
   // Outputs:
   Array
   (
       [My Custom Page Template] => my-custom-page.php
       [A Second Custom Page] => my-page-templates/my-second-page.php
   )