php - Load jQuery from Google AJAX Libraries API in Wordpress with "fallback script" -

i have added wordpress function load jquery library google hosted libraries

if (!is_admin()) add_action("wp_enqueue_scripts", "my_jquery_enqueue", 11); function my_jquery_enqueue() {    wp_deregister_script('jquery');    wp_register_script('jquery', "http" . ($_server['server_port'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js", false, null);    wp_enqueue_script('jquery'); } 

it create this

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> 

how can include fallback option, per html5boilerplate suggested

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <script>window.jquery || document.write('<script src="js/vendor/jquery-1.9.1.min.js"><\/script>')</script> 

like this

try this. replace code code. handle all.

/************* enqueue js *************************/  /* pull jquery google's cdn. if it's not available, grab local copy. */  $url = 'http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js'; // url check against   $test_url = @fopen($url,'r'); // test parameters   if( $test_url !== false ) { // test if url exists        function load_external_jquery() { // load external file           wp_deregister_script( 'jquery' ); // deregisters default wordpress jquery           wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js'); // register external file           wp_enqueue_script('jquery'); // enqueue external file       }        add_action('wp_enqueue_scripts', 'load_external_jquery'); // initiate function   } else {        function load_local_jquery() {           wp_deregister_script('jquery'); // initiate function           wp_register_script('jquery', get_template_directory_uri().'/js/jquery.js', __file__, false, '1.7.2', true); // register local file            wp_enqueue_script('jquery'); // enqueue local file       }        add_action('wp_enqueue_scripts', 'load_local_jquery'); // initiate function   }   

put code in functions.php