Author: NewWPTricks.com

WordPress load its own copy of jQuery into your theme. But there are some advantages loading jQuery from google CDN.

Paste the code given below into your functions.php:

function load_googlecdn_jquery() {
	if (!is_admin()) {
		wp_deregister_script('jquery');
		wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js', false, '1.8.3');
		wp_enqueue_script('jquery');
	}
}
add_action('wp_enqueue_scripts', 'load_googlecdn_jquery');

Don’t do this for your live site, highly recommended only for local development and testing.

Find this in wp-config.php:

define('WP_DEBUG', false);

Change it to:

// define('WP_DEBUG', false);

Now add this code after that:

// Enable WP_DEBUG mode
define('WP_DEBUG', true);

// Enable Debug logging to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);

// Disable display of errors and warnings 
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors',0);

// Use dev versions of core JS and CSS files (only needed if you are modifying these core files)
define('SCRIPT_DEBUG', true);

To disable automatic updates in your WordPress site, add this code in to the wp-config.php:

define('WP_AUTO_UPDATE_CORE', false);