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Use Google’s Copy Of JQuery in WordPress

Watch out! This tutorial is over 8 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Grabs jQuery from Google’s CDN which your visitors will hopefully have cached. This can then be called in your header with <?php wp_enqueue_script("jquery"); ?>

// Call the google CDN version of jQuery for the frontend
// Make sure you use this with wp_enqueue_script('jquery'); in your header
function itlc_jquery_enqueue() {
	wp_deregister_script('jquery');
	wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js", false, null);
	wp_enqueue_script('jquery');
}
if (!is_admin()) add_action("wp_enqueue_scripts", "itlc_jquery_enqueue", 11);