wp_get_themes( array $args = array() )

根据参数返回WP_主题对象的数组。
Returns an array of WP_Theme objects based on the arguments.

目录锚点：#说明#参数#源码#笔记

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说明（Description）

尽管在get_themes（）上有了进步，但是这个函数相当昂贵，并且随着其他主题的增加而线性增长。如果可能，请坚持wp_get_theme（）。

参数（Parameters）

源码（Source）

/**
 * 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
 * @staticvar array $_themes
 *
 * @param array $args The search arguments. Optional.
 * - errors      mixed  True to return themes with errors, false to return themes without errors, null
 *                      to return all themes. Defaults to false.
 * - allowed     mixed  (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. Defaults to null.
 * - blog_id     int    (Multisite) The blog ID used to calculate which themes are allowed. Defaults to 0,
 *                      synonymous for the current blog.
 * @return array 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 ( count( $wp_theme_directories ) > 1 ) {
		// Make sure the current 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 ) )
				$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 ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );
	}

	if ( null !== $args['errors'] ) {
		foreach ( $themes as $theme => $wp_theme ) {
			if ( $wp_theme->errors() != $args['errors'] )
				unset( $themes[ $theme ] );
		}
	}

	return $themes;
}

笔记（Notes）

例子：