/**
 * Prints script tags in document head
 *
 * Called by admin-header.php and by wp_head hook. Since it is called by wp_head on every page load,
 * the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
 * Does make use of already instantiated $wp_scripts if present.
 * Use provided wp_print_scripts hook to register/enqueue new scripts.
 *
 * @see WP_Scripts::print_scripts()
 */
function wp_print_scripts($handles = false)
{
    do_action('wp_print_scripts');
    if ('' === $handles) {
        // for wp_head
        $handles = false;
    }
    global $wp_scripts;
    if (!is_a($wp_scripts, 'WP_Scripts')) {
        if (!$handles) {
            return array();
        } else {
            $wp_scripts = new WP_Scripts();
        }
    }
    return $wp_scripts->print_scripts($handles);
}
/**
 * Prints script tags in document head
 *
 * Called by admin-header.php and by wp_head hook. Since it is called by wp_head on every page load,
 * the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
 * Does make use of already instantiated $wp_scripts if present.
 * Use provided wp_print_scripts hook to register/enqueue new scripts.
 *
 * @see WP_Scripts::print_scripts()
 */
function wp_print_scripts( $handles = false ) {
	do_action( 'wp_print_scripts' );
	if ( '' === $handles ) // for wp_head
		$handles = false;

	global $wp_scripts;
	if ( !is_a($wp_scripts, 'WP_Scripts') ) {
		if ( !$handles )
			return array(); // No need to instantiate if nothing's there.
		else
			$wp_scripts = new WP_Scripts();
	}

	return $wp_scripts->print_scripts( $handles );
}