wp_get_active_and_valid_themes example

/** * WordPress Locale Switcher object for switching locales. * * @since 4.7.0 * * @global WP_Locale_Switcher $wp_locale_switcher WordPress locale switcher object. */
$GLOBALS['wp_locale_switcher'] = new WP_Locale_Switcher();
$GLOBALS['wp_locale_switcher']->init();

// Load the functions for the active theme, for both parent and child theme if applicable. foreach ( wp_get_active_and_valid_themes() as $theme ) {
    if ( file_exists( $theme . '/functions.php' ) ) {
        include $theme . '/functions.php';
    }
}
unset( $theme );

/** * Fires after the theme is loaded. * * @since 3.0.0 */