WordPress at a glance
function is not described

get_theme_roots() WP 2.9.0

Retrieve theme roots.

  • Global. Array. $wp_theme_directories

No Hooks.

Return

Array/String. An array of theme roots keyed by template/stylesheet or a single theme root if all themes have the same root.

Usage

get_theme_roots();

Code of get theme roots: wp-includes/theme.php VER 5.1.1

<?php
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;
}