File "theme.php"
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<?php
/**
* Theme, template, and stylesheet functions.
*
* @package WordPress
* @subpackage Theme
*/
/**
* Returns an array of WP_Theme objects based on the arguments.
*
* Despite advances over get_themes(), this function is quite expensive, and grows
* linearly with additional themes. Stick to wp_get_theme() if possible.
*
* @since 3.4.0
*
* @global array $wp_theme_directories
*
* @param array $args {
* Optional. The search arguments.
*
* @type mixed $errors True to return themes with errors, false to return
* themes without errors, null to return all themes.
* Default false.
* @type mixed $allowed (Multisite) True to return only allowed themes for a site.
* False to return only disallowed themes for a site.
* 'site' to return only site-allowed themes.
* 'network' to return only network-allowed themes.
* Null to return all themes. Default null.
* @type int $blog_id (Multisite) The blog ID used to calculate which themes
* are allowed. Default 0, synonymous for the current blog.
* }
* @return WP_Theme[] Array of WP_Theme objects.
*/
function wp_get_themes( $args = array() ) {
global $wp_theme_directories;
$defaults = array(
'errors' => false,
'allowed' => null,
'blog_id' => 0,
);
$args = wp_parse_args( $args, $defaults );
$theme_directories = search_theme_directories();
if ( is_array( $wp_theme_directories ) && count( $wp_theme_directories ) > 1 ) {
/*
* Make sure the active theme wins out, in case search_theme_directories() picks the wrong
* one in the case of a conflict. (Normally, last registered theme root wins.)
*/
$current_theme = get_stylesheet();
if ( isset( $theme_directories[ $current_theme ] ) ) {
$root_of_current_theme = get_raw_theme_root( $current_theme );
if ( ! in_array( $root_of_current_theme, $wp_theme_directories, true ) ) {
$root_of_current_theme = WP_CONTENT_DIR . $root_of_current_theme;
}
$theme_directories[ $current_theme ]['theme_root'] = $root_of_current_theme;
}
}
if ( empty( $theme_directories ) ) {
return array();
}
if ( is_multisite() && null !== $args['allowed'] ) {
$allowed = $args['allowed'];
if ( 'network' === $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_network() );
} elseif ( 'site' === $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_site( $args['blog_id'] ) );
} elseif ( $allowed ) {
$theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
} else {
$theme_directories = array_diff_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
}
}
$themes = array();
static $_themes = array();
foreach ( $theme_directories as $theme => $theme_root ) {
if ( isset( $_themes[ $theme_root['theme_root'] . '/' . $theme ] ) ) {
$themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ];
} else {
$themes[ $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );
$_themes[ $theme_root['theme_root'] . '/' . $theme ] = $themes[ $theme ];
}
}
if ( null !== $args['errors'] ) {
foreach ( $themes as $theme => $wp_theme ) {
if ( $wp_theme->errors() != $args['errors'] ) {
unset( $themes[ $theme ] );
}
}
}
return $themes;
}
/**
* Gets a WP_Theme object for a theme.
*
* @since 3.4.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet Optional. Directory name for the theme. Defaults to active theme.
* @param string $theme_root Optional. Absolute path of the theme root to look in.
* If not specified, get_raw_theme_root() is used to calculate
* the theme root for the $stylesheet provided (or active theme).
* @return WP_Theme Theme object. Be sure to check the object's exists() method
* if you need to confirm the theme's existence.
*/
function wp_get_theme( $stylesheet = '', $theme_root = '' ) {
global $wp_theme_directories;
if ( empty( $stylesheet ) ) {
$stylesheet = get_stylesheet();
}
if ( empty( $theme_root ) ) {
$theme_root = get_raw_theme_root( $stylesheet );
if ( false === $theme_root ) {
$theme_root = WP_CONTENT_DIR . '/themes';
} elseif ( ! in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
$theme_root = WP_CONTENT_DIR . $theme_root;
}
}
return new WP_Theme( $stylesheet, $theme_root );
}
/**
* Clears the cache held by get_theme_roots() and WP_Theme.
*
* @since 3.5.0
* @param bool $clear_update_cache Whether to clear the theme updates cache.
*/
function wp_clean_themes_cache( $clear_update_cache = true ) {
if ( $clear_update_cache ) {
delete_site_transient( 'update_themes' );
}
search_theme_directories( true );
foreach ( wp_get_themes( array( 'errors' => null ) ) as $theme ) {
$theme->cache_delete();
}
}
/**
* Whether a child theme is in use.
*
* @since 3.0.0
* @since 6.5.0 Makes use of global template variables.
*
* @global string $wp_stylesheet_path Path to current theme's stylesheet directory.
* @global string $wp_template_path Path to current theme's template directory.
*
* @return bool True if a child theme is in use, false otherwise.
*/
function is_child_theme() {
global $wp_stylesheet_path, $wp_template_path;
return $wp_stylesheet_path !== $wp_template_path;
}
/**
* Retrieves name of the current stylesheet.
*
* The theme name that is currently set as the front end theme.
*
* For all intents and purposes, the template name and the stylesheet name
* are going to be the same for most cases.
*
* @since 1.5.0
*
* @return string Stylesheet name.
*/
function get_stylesheet() {
/**
* Filters the name of current stylesheet.
*
* @since 1.5.0
*
* @param string $stylesheet Name of the current stylesheet.
*/
return apply_filters( 'stylesheet', get_option( 'stylesheet' ) );
}
/**
* Retrieves stylesheet directory path for the active theme.
*
* @since 1.5.0
* @since 6.4.0 Memoizes filter execution so that it only runs once for the current theme.
* @since 6.4.2 Memoization removed.
*
* @return string Path to active theme's stylesheet directory.
*/
function get_stylesheet_directory() {
$stylesheet = get_stylesheet();
$theme_root = get_theme_root( $stylesheet );
$stylesheet_dir = "$theme_root/$stylesheet";
/**
* Filters the stylesheet directory path for the active theme.
*
* @since 1.5.0
*
* @param string $stylesheet_dir Absolute path to the active theme.
* @param string $stylesheet Directory name of the active theme.
* @param string $theme_root Absolute path to themes directory.
*/
return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );
}
/**
* Retrieves stylesheet directory URI for the active theme.
*
* @since 1.5.0
*
* @return string URI to active theme's stylesheet directory.
*/
function get_stylesheet_directory_uri() {
$stylesheet = str_replace( '%2F', '/', rawurlencode( get_stylesheet() ) );
$theme_root_uri = get_theme_root_uri( $stylesheet );
$stylesheet_dir_uri = "$theme_root_uri/$stylesheet";
/**
* Filters the stylesheet directory URI.
*
* @since 1.5.0
*
* @param string $stylesheet_dir_uri Stylesheet directory URI.
* @param string $stylesheet Name of the activated theme's directory.
* @param string $theme_root_uri Themes root URI.
*/
return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );
}
/**
* Retrieves stylesheet URI for the active theme.
*
* The stylesheet file name is 'style.css' which is appended to the stylesheet directory URI path.
* See get_stylesheet_directory_uri().
*
* @since 1.5.0
*
* @return string URI to active theme's stylesheet.
*/
function get_stylesheet_uri() {
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$stylesheet_uri = $stylesheet_dir_uri . '/style.css';
/**
* Filters the URI of the active theme stylesheet.
*
* @since 1.5.0
*
* @param string $stylesheet_uri Stylesheet URI for the active theme/child theme.
* @param string $stylesheet_dir_uri Stylesheet directory URI for the active theme/child theme.
*/
return apply_filters( 'stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );
}
/**
* Retrieves the localized stylesheet URI.
*
* The stylesheet directory for the localized stylesheet files are located, by
* default, in the base theme directory. The name of the locale file will be the
* locale followed by '.css'. If that does not exist, then the text direction
* stylesheet will be checked for existence, for example 'ltr.css'.
*
* The theme may change the location of the stylesheet directory by either using
* the {@see 'stylesheet_directory_uri'} or {@see 'locale_stylesheet_uri'} filters.
*
* If you want to change the location of the stylesheet files for the entire
* WordPress workflow, then change the former. If you just have the locale in a
* separate folder, then change the latter.
*
* @since 2.1.0
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @return string URI to active theme's localized stylesheet.
*/
function get_locale_stylesheet_uri() {
global $wp_locale;
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$dir = get_stylesheet_directory();
$locale = get_locale();
if ( file_exists( "$dir/$locale.css" ) ) {
$stylesheet_uri = "$stylesheet_dir_uri/$locale.css";
} elseif ( ! empty( $wp_locale->text_direction ) && file_exists( "$dir/{$wp_locale->text_direction}.css" ) ) {
$stylesheet_uri = "$stylesheet_dir_uri/{$wp_locale->text_direction}.css";
} else {
$stylesheet_uri = '';
}
/**
* Filters the localized stylesheet URI.
*
* @since 2.1.0
*
* @param string $stylesheet_uri Localized stylesheet URI.
* @param string $stylesheet_dir_uri Stylesheet directory URI.
*/
return apply_filters( 'locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri );
}
/**
* Retrieves name of the active theme.
*
* @since 1.5.0
*
* @return string Template name.
*/
function get_template() {
/**
* Filters the name of the active theme.
*
* @since 1.5.0
*
* @param string $template active theme's directory name.
*/
return apply_filters( 'template', get_option( 'template' ) );
}
/**
* Retrieves template directory path for the active theme.
*
* @since 1.5.0
* @since 6.4.0 Memoizes filter execution so that it only runs once for the current theme.
* @since 6.4.1 Memoization removed.
*
* @return string Path to active theme's template directory.
*/
function get_template_directory() {
$template = get_template();
$theme_root = get_theme_root( $template );
$template_dir = "$theme_root/$template";
/**
* Filters the active theme directory path.
*
* @since 1.5.0
*
* @param string $template_dir The path of the active theme directory.
* @param string $template Directory name of the active theme.
* @param string $theme_root Absolute path to the themes directory.
*/
return apply_filters( 'template_directory', $template_dir, $template, $theme_root );
}
/**
* Retrieves template directory URI for the active theme.
*
* @since 1.5.0
*
* @return string URI to active theme's template directory.
*/
function get_template_directory_uri() {
$template = str_replace( '%2F', '/', rawurlencode( get_template() ) );
$theme_root_uri = get_theme_root_uri( $template );
$template_dir_uri = "$theme_root_uri/$template";
/**
* Filters the active theme directory URI.
*
* @since 1.5.0
*
* @param string $template_dir_uri The URI of the active theme directory.
* @param string $template Directory name of the active theme.
* @param string $theme_root_uri The themes root URI.
*/
return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri );
}
/**
* Retrieves theme roots.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @return array|string An array of theme roots keyed by template/stylesheet
* or a single theme root if all themes have the same root.
*/
function get_theme_roots() {
global $wp_theme_directories;
if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) {
return '/themes';
}
$theme_roots = get_site_transient( 'theme_roots' );
if ( false === $theme_roots ) {
search_theme_directories( true ); // Regenerate the transient.
$theme_roots = get_site_transient( 'theme_roots' );
}
return $theme_roots;
}
/**
* Registers a directory that contains themes.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @param string $directory Either the full filesystem path to a theme folder
* or a folder within WP_CONTENT_DIR.
* @return bool True if successfully registered a directory that contains themes,
* false if the directory does not exist.
*/
function register_theme_directory( $directory ) {
global $wp_theme_directories;
if ( ! file_exists( $directory ) ) {
// Try prepending as the theme directory could be relative to the content directory.
$directory = WP_CONTENT_DIR . '/' . $directory;
// If this directory does not exist, return and do not register.
if ( ! file_exists( $directory ) ) {
return false;
}
}
if ( ! is_array( $wp_theme_directories ) ) {
$wp_theme_directories = array();
}
$untrailed = untrailingslashit( $directory );
if ( ! empty( $untrailed ) && ! in_array( $untrailed, $wp_theme_directories, true ) ) {
$wp_theme_directories[] = $untrailed;
}
return true;
}
/**
* Searches all registered theme directories for complete and valid themes.
*
* @since 2.9.0
*
* @global array $wp_theme_directories
*
* @param bool $force Optional. Whether to force a new directory scan. Default false.
* @return array|false Valid themes found on success, false on failure.
*/
function search_theme_directories( $force = false ) {
global $wp_theme_directories;
static $found_themes = null;
if ( empty( $wp_theme_directories ) ) {
return false;
}
if ( ! $force && isset( $found_themes ) ) {
return $found_themes;
}
$found_themes = array();
$wp_theme_directories = (array) $wp_theme_directories;
$relative_theme_roots = array();
/*
* Set up maybe-relative, maybe-absolute array of theme directories.
* We always want to return absolute, but we need to cache relative
* to use in get_theme_root().
*/
foreach ( $wp_theme_directories as $theme_root ) {
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$relative_theme_roots[ str_replace( WP_CONTENT_DIR, '', $theme_root ) ] = $theme_root;
} else {
$relative_theme_roots[ $theme_root ] = $theme_root;
}
}
/**
* Filters whether to get the cache of the registered theme directories.
*
* @since 3.4.0
*
* @param bool $cache_expiration Whether to get the cache of the theme directories. Default false.
* @param string $context The class or function name calling the filter.
*/
$cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' );
if ( $cache_expiration ) {
$cached_roots = get_site_transient( 'theme_roots' );
if ( is_array( $cached_roots ) ) {
foreach ( $cached_roots as $theme_dir => $theme_root ) {
// A cached theme root is no longer around, so skip it.
if ( ! isset( $relative_theme_roots[ $theme_root ] ) ) {
continue;
}
$found_themes[ $theme_dir ] = array(
'theme_file' => $theme_dir . '/style.css',
'theme_root' => $relative_theme_roots[ $theme_root ], // Convert relative to absolute.
);
}
return $found_themes;
}
if ( ! is_int( $cache_expiration ) ) {
$cache_expiration = 30 * MINUTE_IN_SECONDS;
}
} else {
$cache_expiration = 30 * MINUTE_IN_SECONDS;
}
/* Loop the registered theme directories and extract all themes */
foreach ( $wp_theme_directories as $theme_root ) {
// Start with directories in the root of the active theme directory.
$dirs = @ scandir( $theme_root );
if ( ! $dirs ) {
trigger_error( "$theme_root is not readable", E_USER_NOTICE );
continue;
}
foreach ( $dirs as $dir ) {
if ( ! is_dir( $theme_root . '/' . $dir ) || '.' === $dir[0] || 'CVS' === $dir ) {
continue;
}
if ( file_exists( $theme_root . '/' . $dir . '/style.css' ) ) {
/*
* wp-content/themes/a-single-theme
* wp-content/themes is $theme_root, a-single-theme is $dir.
*/
$found_themes[ $dir ] = array(
'theme_file' => $dir . '/style.css',
'theme_root' => $theme_root,
);
} else {
$found_theme = false;
/*
* wp-content/themes/a-folder-of-themes/*
* wp-content/themes is $theme_root, a-folder-of-themes is $dir, then themes are $sub_dirs.
*/
$sub_dirs = @ scandir( $theme_root . '/' . $dir );
if ( ! $sub_dirs ) {
trigger_error( "$theme_root/$dir is not readable", E_USER_NOTICE );
continue;
}
foreach ( $sub_dirs as $sub_dir ) {
if ( ! is_dir( $theme_root . '/' . $dir . '/' . $sub_dir ) || '.' === $dir[0] || 'CVS' === $dir ) {
continue;
}
if ( ! file_exists( $theme_root . '/' . $dir . '/' . $sub_dir . '/style.css' ) ) {
continue;
}
$found_themes[ $dir . '/' . $sub_dir ] = array(
'theme_file' => $dir . '/' . $sub_dir . '/style.css',
'theme_root' => $theme_root,
);
$found_theme = true;
}
/*
* Never mind the above, it's just a theme missing a style.css.
* Return it; WP_Theme will catch the error.
*/
if ( ! $found_theme ) {
$found_themes[ $dir ] = array(
'theme_file' => $dir . '/style.css',
'theme_root' => $theme_root,
);
}
}
}
}
asort( $found_themes );
$theme_roots = array();
$relative_theme_roots = array_flip( $relative_theme_roots );
foreach ( $found_themes as $theme_dir => $theme_data ) {
$theme_roots[ $theme_dir ] = $relative_theme_roots[ $theme_data['theme_root'] ]; // Convert absolute to relative.
}
if ( get_site_transient( 'theme_roots' ) != $theme_roots ) {
set_site_transient( 'theme_roots', $theme_roots, $cache_expiration );
}
return $found_themes;
}
/**
* Retrieves path to themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template Optional. The stylesheet or template name of the theme.
* Default is to leverage the main theme root.
* @return string Themes directory path.
*/
function get_theme_root( $stylesheet_or_template = '' ) {
global $wp_theme_directories;
$theme_root = '';
if ( $stylesheet_or_template ) {
$theme_root = get_raw_theme_root( $stylesheet_or_template );
if ( $theme_root ) {
/*
* Always prepend WP_CONTENT_DIR unless the root currently registered as a theme directory.
* This gives relative theme roots the benefit of the doubt when things go haywire.
*/
if ( ! in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
$theme_root = WP_CONTENT_DIR . $theme_root;
}
}
}
if ( ! $theme_root ) {
$theme_root = WP_CONTENT_DIR . '/themes';
}
/**
* Filters the absolute path to the themes directory.
*
* @since 1.5.0
*
* @param string $theme_root Absolute path to themes directory.
*/
return apply_filters( 'theme_root', $theme_root );
}
/**
* Retrieves URI for themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template Optional. The stylesheet or template name of the theme.
* Default is to leverage the main theme root.
* @param string $theme_root Optional. The theme root for which calculations will be based,
* preventing the need for a get_raw_theme_root() call. Default empty.
* @return string Themes directory URI.
*/
function get_theme_root_uri( $stylesheet_or_template = '', $theme_root = '' ) {
global $wp_theme_directories;
if ( $stylesheet_or_template && ! $theme_root ) {
$theme_root = get_raw_theme_root( $stylesheet_or_template );
}
if ( $stylesheet_or_template && $theme_root ) {
if ( in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
// Absolute path. Make an educated guess. YMMV -- but note the filter below.
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$theme_root_uri = content_url( str_replace( WP_CONTENT_DIR, '', $theme_root ) );
} elseif ( str_starts_with( $theme_root, ABSPATH ) ) {
$theme_root_uri = site_url( str_replace( ABSPATH, '', $theme_root ) );
} elseif ( str_starts_with( $theme_root, WP_PLUGIN_DIR ) || str_starts_with( $theme_root, WPMU_PLUGIN_DIR ) ) {
$theme_root_uri = plugins_url( basename( $theme_root ), $theme_root );
} else {
$theme_root_uri = $theme_root;
}
} else {
$theme_root_uri = content_url( $theme_root );
}
} else {
$theme_root_uri = content_url( 'themes' );
}
/**
* Filters the URI for themes directory.
*
* @since 1.5.0
*
* @param string $theme_root_uri The URI for themes directory.
* @param string $siteurl WordPress web address which is set in General Options.
* @param string $stylesheet_or_template The stylesheet or template name of the theme.
*/
return apply_filters( 'theme_root_uri', $theme_root_uri, get_option( 'siteurl' ), $stylesheet_or_template );
}
/**
* Gets the raw theme root relative to the content directory with no filters applied.
*
* @since 3.1.0
*
* @global array $wp_theme_directories
*
* @param string $stylesheet_or_template The stylesheet or template name of the theme.
* @param bool $skip_cache Optional. Whether to skip the cache.
* Defaults to false, meaning the cache is used.
* @return string Theme root.
*/
function get_raw_theme_root( $stylesheet_or_template, $skip_cache = false ) {
global $wp_theme_directories;
if ( ! is_array( $wp_theme_directories ) || count( $wp_theme_directories ) <= 1 ) {
return '/themes';
}
$theme_root = false;
// If requesting the root for the active theme, consult options to avoid calling get_theme_roots().
if ( ! $skip_cache ) {
if ( get_option( 'stylesheet' ) == $stylesheet_or_template ) {
$theme_root = get_option( 'stylesheet_root' );
} elseif ( get_option( 'template' ) == $stylesheet_or_template ) {
$theme_root = get_option( 'template_root' );
}
}
if ( empty( $theme_root ) ) {
$theme_roots = get_theme_roots();
if ( ! empty( $theme_roots[ $stylesheet_or_template ] ) ) {
$theme_root = $theme_roots[ $stylesheet_or_template ];
}
}
return $theme_root;
}
/**
* Displays localized stylesheet link element.
*
* @since 2.1.0
*/
function locale_stylesheet() {
$stylesheet = get_locale_stylesheet_uri();
if ( empty( $stylesheet ) ) {
return;
}
$type_attr = current_theme_supports( 'html5', 'style' ) ? '' : ' type="text/css"';
printf(
'<link rel="stylesheet" href="%s"%s media="screen" />',
$stylesheet,
$type_attr
);
}
/**
* Switches the theme.
*
* Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature
* of two arguments: $template then $stylesheet. This is for backward compatibility.
*
* @since 2.5.0
*
* @global array $wp_theme_directories
* @global WP_Customize_Manager $wp_customize
* @global array $sidebars_widgets
* @global array $wp_registered_sidebars
*
* @param string $stylesheet Stylesheet name.
*/
function switch_theme( $stylesheet ) {
global $wp_theme_directories, $wp_customize, $sidebars_widgets, $wp_registered_sidebars;
$requirements = validate_theme_requirements( $stylesheet );
if ( is_wp_error( $requirements ) ) {
wp_die( $requirements );
}
$_sidebars_widgets = null;
if ( 'wp_ajax_customize_save' === current_action() ) {
$old_sidebars_widgets_data_setting = $wp_customize->get_setting( 'old_sidebars_widgets_data' );
if ( $old_sidebars_widgets_data_setting ) {
$_sidebars_widgets = $wp_customize->post_value( $old_sidebars_widgets_data_setting );
}
} elseif ( is_array( $sidebars_widgets ) ) {
$_sidebars_widgets = $sidebars_widgets;
}
if ( is_array( $_sidebars_widgets ) ) {
set_theme_mod(
'sidebars_widgets',
array(
'time' => time(),
'data' => $_sidebars_widgets,
)
);
}
$nav_menu_locations = get_theme_mod( 'nav_menu_locations' );
update_option( 'theme_switch_menu_locations', $nav_menu_locations );
if ( func_num_args() > 1 ) {
$stylesheet = func_get_arg( 1 );
}
$old_theme = wp_get_theme();
$new_theme = wp_get_theme( $stylesheet );
$template = $new_theme->get_template();
if ( wp_is_recovery_mode() ) {
$paused_themes = wp_paused_themes();
$paused_themes->delete( $old_theme->get_stylesheet() );
$paused_themes->delete( $old_theme->get_template() );
}
update_option( 'template', $template );
update_option( 'stylesheet', $stylesheet );
if ( count( $wp_theme_directories ) > 1 ) {
update_option( 'template_root', get_raw_theme_root( $template, true ) );
update_option( 'stylesheet_root', get_raw_theme_root( $stylesheet, true ) );
} else {
delete_option( 'template_root' );
delete_option( 'stylesheet_root' );
}
$new_name = $new_theme->get( 'Name' );
update_option( 'current_theme', $new_name );
// Migrate from the old mods_{name} option to theme_mods_{slug}.
if ( is_admin() && false === get_option( 'theme_mods_' . $stylesheet ) ) {
$default_theme_mods = (array) get_option( 'mods_' . $new_name );
if ( ! empty( $nav_menu_locations ) && empty( $default_theme_mods['nav_menu_locations'] ) ) {
$default_theme_mods['nav_menu_locations'] = $nav_menu_locations;
}
add_option( "theme_mods_$stylesheet", $default_theme_mods );
} else {
/*
* Since retrieve_widgets() is called when initializing a theme in the Customizer,
* we need to remove the theme mods to avoid overwriting changes made via
* the Customizer when accessing wp-admin/widgets.php.
*/
if ( 'wp_ajax_customize_save' === current_action() ) {
remove_theme_mod( 'sidebars_widgets' );
}
}
// Stores classic sidebars for later use by block themes.
if ( $new_theme->is_block_theme() ) {
set_theme_mod( 'wp_classic_sidebars', $wp_registered_sidebars );
}
update_option( 'theme_switched', $old_theme->get_stylesheet() );
/*
* Reset template globals when switching themes outside of a switched blog
* context to ensure templates will be loaded from the new theme.
*/
if ( ! is_multisite() || ! ms_is_switched() ) {
wp_set_template_globals();
}
// Clear pattern caches.
if ( ! is_multisite() ) {
$new_theme->delete_pattern_cache();
$old_theme->delete_pattern_cache();
}
// Set autoload=no for the old theme, autoload=yes for the switched theme.
$theme_mods_options = array(
'theme_mods_' . $stylesheet => 'yes',
'theme_mods_' . $old_theme->get_stylesheet() => 'no',
);
wp_set_option_autoload_values( $theme_mods_options );
/**
* Fires after the theme is switched.
*
* See {@see 'after_switch_theme'}.
*
* @since 1.5.0
* @since 4.5.0 Introduced the `$old_theme` parameter.
*
* @param string $new_name Name of the new theme.
* @param WP_Theme $new_theme WP_Theme instance of the new theme.
* @param WP_Theme $old_theme WP_Theme instance of the old theme.
*/
do_action( 'switch_theme', $new_name, $new_theme, $old_theme );
}
/**
* Checks that the active theme has the required files.
*
* Standalone themes need to have a `templates/index.html` or `index.php` template file.
* Child themes need to have a `Template` header in the `style.css` stylesheet.
*
* Does not initially check the default theme, which is the fallback and should always exist.
* But if it doesn't exist, it'll fall back to the latest core default theme that does exist.
* Will switch theme to the fallback theme if active theme does not validate.
*
* You can use the {@see 'validate_current_theme'} filter to return false to disable
* this functionality.
*
* @since 1.5.0
* @since 6.0.0 Removed the requirement for block themes to have an `index.php` template.
*
* @see WP_DEFAULT_THEME
*
* @return bool
*/
function validate_current_theme() {
/**
* Filters whether to validate the active theme.
*
* @since 2.7.0
*
* @param bool $validate Whether to validate the active theme. Default true.
*/
if ( wp_installing() || ! apply_filters( 'validate_current_theme', true ) ) {
return true;
}
if (
! file_exists( get_template_directory() . '/templates/index.html' )
&& ! file_exists( get_template_directory() . '/block-templates/index.html' ) // Deprecated path support since 5.9.0.
&& ! file_exists( get_template_directory() . '/index.php' )
) {
// Invalid.
} elseif ( ! file_exists( get_template_directory() . '/style.css' ) ) {
// Invalid.
} elseif ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) {
// Invalid.
} else {
// Valid.
return true;
}
$default = wp_get_theme( WP_DEFAULT_THEME );
if ( $default->exists() ) {
switch_theme( WP_DEFAULT_THEME );
return false;
}
/**
* If we're in an invalid state but WP_DEFAULT_THEME doesn't exist,
* switch to the latest core default theme that's installed.
*
* If it turns out that this latest core default theme is our current
* theme, then there's nothing we can do about that, so we have to bail,
* rather than going into an infinite loop. (This is why there are
* checks against WP_DEFAULT_THEME above, also.) We also can't do anything
* if it turns out there is no default theme installed. (That's `false`.)
*/
$default = WP_Theme::get_core_default_theme();
if ( false === $default || get_stylesheet() == $default->get_stylesheet() ) {
return true;
}
switch_theme( $default->get_stylesheet() );
return false;
}
/**
* Validates the theme requirements for WordPress version and PHP version.
*
* Uses the information from `Requires at least` and `Requires PHP` headers
* defined in the theme's `style.css` file.
*
* @since 5.5.0
* @since 5.8.0 Removed support for using `readme.txt` as a fallback.
*
* @param string $stylesheet Directory name for the theme.
* @return true|WP_Error True if requirements are met, WP_Error on failure.
*/
function validate_theme_requirements( $stylesheet ) {
$theme = wp_get_theme( $stylesheet );
$requirements = array(
'requires' => ! empty( $theme->get( 'RequiresWP' ) ) ? $theme->get( 'RequiresWP' ) : '',
'requires_php' => ! empty( $theme->get( 'RequiresPHP' ) ) ? $theme->get( 'RequiresPHP' ) : '',
);
$compatible_wp = is_wp_version_compatible( $requirements['requires'] );
$compatible_php = is_php_version_compatible( $requirements['requires_php'] );
if ( ! $compatible_wp && ! $compatible_php ) {
return new WP_Error(
'theme_wp_php_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current WordPress and PHP versions do not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
} elseif ( ! $compatible_php ) {
return new WP_Error(
'theme_php_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current PHP version does not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
} elseif ( ! $compatible_wp ) {
return new WP_Error(
'theme_wp_incompatible',
sprintf(
/* translators: %s: Theme name. */
_x( '<strong>Error:</strong> Current WordPress version does not meet minimum requirements for %s.', 'theme' ),
$theme->display( 'Name' )
)
);
}
return true;
}
/**
* Retrieves all theme modifications.
*
* @since 3.1.0
* @since 5.9.0 The return value is always an array.
*
* @return array Theme modifications.
*/
function get_theme_mods() {
$theme_slug = get_option( 'stylesheet' );
$mods = get_option( "theme_mods_$theme_slug" );
if ( false === $mods ) {
$theme_name = get_option( 'current_theme' );
if ( false === $theme_name ) {
$theme_name = wp_get_theme()->get( 'Name' );
}
$mods = get_option( "mods_$theme_name" ); // Deprecated location.
if ( is_admin() && false !== $mods ) {
update_option( "theme_mods_$theme_slug", $mods );
delete_option( "mods_$theme_name" );
}
}
if ( ! is_array( $mods ) ) {
$mods = array();
}
return $mods;
}
/**
* Retrieves theme modification value for the active theme.
*
* If the modification name does not exist and `$default_value` is a string, then the
* default will be passed through the {@link https://www.php.net/sprintf sprintf()}
* PHP function with the template directory URI as the first value and the
* stylesheet directory URI as the second value.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
* @param mixed $default_value Optional. Theme modification default value. Default false.
* @return mixed Theme modification value.
*/
function get_theme_mod( $name, $default_value = false ) {
$mods = get_theme_mods();
if ( isset( $mods[ $name ] ) ) {
/**
* Filters the theme modification, or 'theme_mod', value.
*
* The dynamic portion of the hook name, `$name`, refers to the key name
* of the modification array. For example, 'header_textcolor', 'header_image',
* and so on depending on the theme options.
*
* @since 2.2.0
*
* @param mixed $current_mod The value of the active theme modification.
*/
return apply_filters( "theme_mod_{$name}", $mods[ $name ] );
}
if ( is_string( $default_value ) ) {
// Only run the replacement if an sprintf() string format pattern was found.
if ( preg_match( '#(?<!%)%(?:\d+\$?)?s#', $default_value ) ) {
// Remove a single trailing percent sign.
$default_value = preg_replace( '#(?<!%)%$#', '', $default_value );
$default_value = sprintf( $default_value, get_template_directory_uri(), get_stylesheet_directory_uri() );
}
}
/** This filter is documented in wp-includes/theme.php */
return apply_filters( "theme_mod_{$name}", $default_value );
}
/**
* Updates theme modification value for the active theme.
*
* @since 2.1.0
* @since 5.6.0 A return value was added.
*
* @param string $name Theme modification name.
* @param mixed $value Theme modification value.
* @return bool True if the value was updated, false otherwise.
*/
function set_theme_mod( $name, $value ) {
$mods = get_theme_mods();
$old_value = isset( $mods[ $name ] ) ? $mods[ $name ] : false;
/**
* Filters the theme modification, or 'theme_mod', value on save.
*
* The dynamic portion of the hook name, `$name`, refers to the key name
* of the modification array. For example, 'header_textcolor', 'header_image',
* and so on depending on the theme options.
*
* @since 3.9.0
*
* @param mixed $value The new value of the theme modification.
* @param mixed $old_value The current value of the theme modification.
*/
$mods[ $name ] = apply_filters( "pre_set_theme_mod_{$name}", $value, $old_value );
$theme = get_option( 'stylesheet' );
return update_option( "theme_mods_$theme", $mods );
}
/**
* Removes theme modification name from active theme list.
*
* If removing the name also removes all elements, then the entire option
* will be removed.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
*/
function remove_theme_mod( $name ) {
$mods = get_theme_mods();
if ( ! isset( $mods[ $name ] ) ) {
return;
}
unset( $mods[ $name ] );
if ( empty( $mods ) ) {
remove_theme_mods();
return;
}
$theme = get_option( 'stylesheet' );
update_option( "theme_mods_$theme", $mods );
}
/**
* Removes theme modifications option for the active theme.
*
* @since 2.1.0
*/
function remove_theme_mods() {
delete_option( 'theme_mods_' . get_option( 'stylesheet' ) );
// Old style.
$theme_name = get_option( 'current_theme' );
if ( false === $theme_name ) {
$theme_name = wp_get_theme()->get( 'Name' );
}
delete_option( 'mods_' . $theme_name );
}
/**
* Retrieves the custom header text color in 3- or 6-digit hexadecimal form.
*
* @since 2.1.0
*
* @return string Header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).
*/
function get_header_textcolor() {
return get_theme_mod( 'header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
}
/**
* Displays the custom header text color in 3- or 6-digit hexadecimal form (minus the hash symbol).
*
* @since 2.1.0
*/
function header_textcolor() {
echo get_header_textcolor();
}
/**
* Whether to display the header text.
*
* @since 3.4.0
*
* @return bool
*/
function display_header_text() {
if ( ! current_theme_supports( 'custom-header', 'header-text' ) ) {
return false;
}
$text_color = get_theme_mod( 'header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
return 'blank' !== $text_color;
}
/**
* Checks whether a header image is set or not.
*
* @since 4.2.0
*
* @see get_header_image()
*
* @return bool Whether a header image is set or not.
*/
function has_header_image() {
return (bool) get_header_image();
}
/**
* Retrieves header image for custom header.
*
* @since 2.1.0
*
* @return string|false
*/
function get_header_image() {
$url = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
if ( 'remove-header' === $url ) {
return false;
}
if ( is_random_header_image() ) {
$url = get_random_header_image();
}
/**
* Filters the header image URL.
*
* @since 6.1.0
*
* @param string $url Header image URL.
*/
$url = apply_filters( 'get_header_image', $url );
if ( ! is_string( $url ) ) {
return false;
}
$url = trim( $url );
return sanitize_url( set_url_scheme( $url ) );
}
/**
* Creates image tag markup for a custom header image.
*
* @since 4.4.0
*
* @param array $attr Optional. Additional attributes for the image tag. Can be used
* to override the default attributes. Default empty.
* @return string HTML image element markup or empty string on failure.
*/
function get_header_image_tag( $attr = array() ) {
$header = get_custom_header();
$header->url = get_header_image();
if ( ! $header->url ) {
return '';
}
$width = absint( $header->width );
$height = absint( $header->height );
$alt = '';
// Use alternative text assigned to the image, if available. Otherwise, leave it empty.
if ( ! empty( $header->attachment_id ) ) {
$image_alt = get_post_meta( $header->attachment_id, '_wp_attachment_image_alt', true );
if ( is_string( $image_alt ) ) {
$alt = $image_alt;
}
}
$attr = wp_parse_args(
$attr,
array(
'src' => $header->url,
'width' => $width,
'height' => $height,
'alt' => $alt,
)
);
// Generate 'srcset' and 'sizes' if not already present.
if ( empty( $attr['srcset'] ) && ! empty( $header->attachment_id ) ) {
$image_meta = get_post_meta( $header->attachment_id, '_wp_attachment_metadata', true );
$size_array = array( $width, $height );
if ( is_array( $image_meta ) ) {
$srcset = wp_calculate_image_srcset( $size_array, $header->url, $image_meta, $header->attachment_id );
if ( ! empty( $attr['sizes'] ) ) {
$sizes = $attr['sizes'];
} else {
$sizes = wp_calculate_image_sizes( $size_array, $header->url, $image_meta, $header->attachment_id );
}
if ( $srcset && $sizes ) {
$attr['srcset'] = $srcset;
$attr['sizes'] = $sizes;
}
}
}
$attr = array_merge(
$attr,
wp_get_loading_optimization_attributes( 'img', $attr, 'get_header_image_tag' )
);
/*
* If the default value of `lazy` for the `loading` attribute is overridden
* to omit the attribute for this image, ensure it is not included.
*/
if ( isset( $attr['loading'] ) && ! $attr['loading'] ) {
unset( $attr['loading'] );
}
// If the `fetchpriority` attribute is overridden and set to false or an empty string.
if ( isset( $attr['fetchpriority'] ) && ! $attr['fetchpriority'] ) {
unset( $attr['fetchpriority'] );
}
// If the `decoding` attribute is overridden and set to false or an empty string.
if ( isset( $attr['decoding'] ) && ! $attr['decoding'] ) {
unset( $attr['decoding'] );
}
/**
* Filters the list of header image attributes.
*
* @since 5.9.0
*
* @param array $attr Array of the attributes for the image tag.
* @param object $header The custom header object returned by 'get_custom_header()'.
*/
$attr = apply_filters( 'get_header_image_tag_attributes', $attr, $header );
$attr = array_map( 'esc_attr', $attr );
$html = '<img';
foreach ( $attr as $name => $value ) {
$html .= ' ' . $name . '="' . $value . '"';
}
$html .= ' />';
/**
* Filters the markup of header images.
*
* @since 4.4.0
*
* @param string $html The HTML image tag markup being filtered.
* @param object $header The custom header object returned by 'get_custom_header()'.
* @param array $attr Array of the attributes for the image tag.
*/
return apply_filters( 'get_header_image_tag', $html, $header, $attr );
}
/**
* Displays the image markup for a custom header image.
*
* @since 4.4.0
*
* @param array $attr Optional. Attributes for the image markup. Default empty.
*/
function the_header_image_tag( $attr = array() ) {
echo get_header_image_tag( $attr );
}
/**
* Gets random header image data from registered images in theme.
*
* @since 3.4.0
*
* @access private
*
* @global array $_wp_default_headers
*
* @return object
*/
function _get_random_header_data() {
global $_wp_default_headers;
static $_wp_random_header = null;
if ( empty( $_wp_random_header ) ) {
$header_image_mod = get_theme_mod( 'header_image', '' );
$headers = array();
if ( 'random-uploaded-image' === $header_image_mod ) {
$headers = get_uploaded_header_images();
} elseif ( ! empty( $_wp_default_headers ) ) {
if ( 'random-default-image' === $header_image_mod ) {
$headers = $_wp_default_headers;
} else {
if ( current_theme_supports( 'custom-header', 'random-default' ) ) {
$headers = $_wp_default_headers;
}
}
}
if ( empty( $headers ) ) {
return new stdClass();
}
$_wp_random_header = (object) $headers[ array_rand( $headers ) ];
$_wp_random_header->url = sprintf(
$_wp_random_header->url,
get_template_directory_uri(),
get_stylesheet_directory_uri()
);
$_wp_random_header->thumbnail_url = sprintf(
$_wp_random_header->thumbnail_url,
get_template_directory_uri(),
get_stylesheet_directory_uri()
);
}
return $_wp_random_header;
}
/**
* Gets random header image URL from registered images in theme.
*
* @since 3.2.0
*
* @return string Path to header image.
*/
function get_random_header_image() {
$random_image = _get_random_header_data();
if ( empty( $random_image->url ) ) {
return '';
}
return $random_image->url;
}
/**
* Checks if random header image is in use.
*
* Always true if user expressly chooses the option in Appearance > Header.
* Also true if theme has multiple header images registered, no specific header image
* is chosen, and theme turns on random headers with add_theme_support().
*
* @since 3.2.0
*
* @param string $type The random pool to use. Possible values include 'any',
* 'default', 'uploaded'. Default 'any'.
* @return bool
*/
function is_random_header_image( $type = 'any' ) {
$header_image_mod = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
if ( 'any' === $type ) {
if ( 'random-default-image' === $header_image_mod
|| 'random-uploaded-image' === $header_image_mod
|| ( empty( $header_image_mod ) && '' !== get_random_header_image() )
) {
return true;
}
} else {
if ( "random-$type-image" === $header_image_mod ) {
return true;
} elseif ( 'default' === $type
&& empty( $header_image_mod ) && '' !== get_random_header_image()
) {
return true;
}
}
return false;
}
/**
* Displays header image URL.
*
* @since 2.1.0
*/
function header_image() {
$image = get_header_image();
if ( $image ) {
echo esc_url( $image );
}
}
/**
* Gets the header images uploaded for the active theme.
*
* @since 3.2.0
*
* @return array
*/
function get_uploaded_header_images() {
$header_images = array();
// @todo Caching.
$headers = get_posts(
array(
'post_type' => 'attachment',
'meta_key' => '_wp_attachment_is_custom_header',
'meta_value' => get_option( 'stylesheet' ),
'orderby' => 'none',
'nopaging' => true,
)
);
if ( empty( $headers ) ) {
return array();
}
foreach ( (array) $headers as $header ) {
$url = sanitize_url( wp_get_attachment_url( $header->ID ) );
$header_data = wp_get_attachment_metadata( $header->ID );
$header_index = $header->ID;
$header_images[ $header_index ] = array();
$header_images[ $header_index ]['attachment_id'] = $header->ID;
$header_images[ $header_index ]['url'] = $url;
$header_images[ $header_index ]['thumbnail_url'] = $url;
$header_images[ $header_index ]['alt_text'] = get_post_meta( $header->ID, '_wp_attachment_image_alt', true );
if ( isset( $header_data['attachment_parent'] ) ) {
$header_images[ $header_index ]['attachment_parent'] = $header_data['attachment_parent'];
} else {
$header_images[ $header_index ]['attachment_parent'] = '';
}
if ( isset( $header_data['width'] ) ) {
$header_images[ $header_index ]['width'] = $header_data['width'];
}
if ( isset( $header_data['height'] ) ) {
$header_images[ $header_index ]['height'] = $header_data['height'];
}
}
return $header_images;
}
/**
* Gets the header image data.
*
* @since 3.4.0
*
* @global array $_wp_default_headers
*
* @return object
*/
function get_custom_header() {
global $_wp_default_headers;
if ( is_random_header_image() ) {
$data = _get_random_header_data();
} else {
$data = get_theme_mod( 'header_image_data' );
if ( ! $data && current_theme_supports( 'custom-header', 'default-image' ) ) {
$directory_args = array( get_template_directory_uri(), get_stylesheet_directory_uri() );
$data = array();
$data['url'] = vsprintf( get_theme_support( 'custom-header', 'default-image' ), $directory_args );
$data['thumbnail_url'] = $data['url'];
if ( ! empty( $_wp_default_headers ) ) {
foreach ( (array) $_wp_default_headers as $default_header ) {
$url = vsprintf( $default_header['url'], $directory_args );
if ( $data['url'] == $url ) {
$data = $default_header;
$data['url'] = $url;
$data['thumbnail_url'] = vsprintf( $data['thumbnail_url'], $directory_args );
break;
}
}
}
}
}
$default = array(
'url' => '',
'thumbnail_url' => '',
'width' => get_theme_support( 'custom-header', 'width' ),
'height' => get_theme_support( 'custom-header', 'height' ),
'video' => get_theme_support( 'custom-header', 'video' ),
);
return (object) wp_parse_args( $data, $default );
}
/**
* Registers a selection of default headers to be displayed by the custom header admin UI.
*
* @since 3.0.0
*
* @global array $_wp_default_headers
*
* @param array $headers Array of headers keyed by a string ID. The IDs point to arrays
* containing 'url', 'thumbnail_url', and 'description' keys.
*/
function register_default_headers( $headers ) {
global $_wp_default_headers;
$_wp_default_headers = array_merge( (array) $_wp_default_headers, (array) $headers );
}
/**
* Unregisters default headers.
*
* This function must be called after register_default_headers() has already added the
* header you want to remove.
*
* @see register_default_headers()
* @since 3.0.0
*
* @global array $_wp_default_headers
*
* @param string|array $header The header string id (key of array) to remove, or an array thereof.
* @return bool|void A single header returns true on success, false on failure.
* There is currently no return value for multiple headers.
*/
function unregister_default_headers( $header ) {
global $_wp_default_headers;
if ( is_array( $header ) ) {
array_map( 'unregister_default_headers', $header );
} elseif ( isset( $_wp_default_headers[ $header ] ) ) {
unset( $_wp_default_headers[ $header ] );
return true;
} else {
return false;
}
}
/**
* Checks whether a header video is set or not.
*
* @since 4.7.0
*
* @see get_header_video_url()
*
* @return bool Whether a header video is set or not.
*/
function has_header_video() {
return (bool) get_header_video_url();
}
/**
* Retrieves header video URL for custom header.
*
* Uses a local video if present, or falls back to an external video.
*
* @since 4.7.0
*
* @return string|false Header video URL or false if there is no video.
*/
function get_header_video_url() {
$id = absint( get_theme_mod( 'header_video' ) );
if ( $id ) {
// Get the file URL from the attachment ID.
$url = wp_get_attachment_url( $id );
} else {
$url = get_theme_mod( 'external_header_video' );
}
/**
* Filters the header video URL.
*
* @since 4.7.3
*
* @param string $url Header video URL, if available.
*/
$url = apply_filters( 'get_header_video_url', $url );
if ( ! $id && ! $url ) {
return false;
}
return sanitize_url( set_url_scheme( $url ) );
}
/**
* Displays header video URL.
*
* @since 4.7.0
*/
function the_header_video_url() {
$video = get_header_video_url();
if ( $video ) {
echo esc_url( $video );
}
}
/**
* Retrieves header video settings.
*
* @since 4.7.0
*
* @return array
*/
function get_header_video_settings() {
$header = get_custom_header();
$video_url = get_header_video_url();
$video_type = wp_check_filetype( $video_url, wp_get_mime_types() );
$settings = array(
'mimeType' => '',
'posterUrl' => get_header_image(),
'videoUrl' => $video_url,
'width' => absint( $header->width ),
'height' => absint( $header->height ),
'minWidth' => 900,
'minHeight' => 500,
'l10n' => array(
'pause' => __( 'Pause' ),
'play' => __( 'Play' ),
'pauseSpeak' => __( 'Video is paused.' ),
'playSpeak' => __( 'Video is playing.' ),
),
);
if ( preg_match( '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#', $video_url ) ) {
$settings['mimeType'] = 'video/x-youtube';
} elseif ( ! empty( $video_type['type'] ) ) {
$settings['mimeType'] = $video_type['type'];
}
/**
* Filters header video settings.
*
* @since 4.7.0
*
* @param array $settings An array of header video settings.
*/
return apply_filters( 'header_video_settings', $settings );
}
/**
* Checks whether a custom header is set or not.
*
* @since 4.7.0
*
* @return bool True if a custom header is set. False if not.
*/
function has_custom_header() {
if ( has_header_image() || ( has_header_video() && is_header_video_active() ) ) {
return true;
}
return false;
}
/**
* Checks whether the custom header video is eligible to show on the current page.
*
* @since 4.7.0
*
* @return bool True if the custom header video should be shown. False if not.
*/
function is_header_video_active() {
if ( ! get_theme_support( 'custom-header', 'video' ) ) {
return false;
}
$video_active_cb = get_theme_support( 'custom-header', 'video-active-callback' );
if ( empty( $video_active_cb ) || ! is_callable( $video_active_cb ) ) {
$show_video = true;
} else {
$show_video = call_user_func( $video_active_cb );
}
/**
* Filters whether the custom header video is eligible to show on the current page.
*
* @since 4.7.0
*
* @param bool $show_video Whether the custom header video should be shown. Returns the value
* of the theme setting for the `custom-header`'s `video-active-callback`.
* If no callback is set, the default value is that of `is_front_page()`.
*/
return apply_filters( 'is_header_video_active', $show_video );
}
/**
* Retrieves the markup for a custom header.
*
* The container div will always be returned in the Customizer preview.
*
* @since 4.7.0
*
* @return string The markup for a custom header on success.
*/
function get_custom_header_markup() {
if ( ! has_custom_header() && ! is_customize_preview() ) {
return '';
}
return sprintf(
'<div id="wp-custom-header" class="wp-custom-header">%s</div>',
get_header_image_tag()
);
}
/**
* Prints the markup for a custom header.
*
* A container div will always be printed in the Customizer preview.
*
* @since 4.7.0
*/
function the_custom_header_markup() {
$custom_header = get_custom_header_markup();
if ( empty( $custom_header ) ) {
return;
}
echo $custom_header;
if