As seen here: http://wycks.wordpress.com/2013/12/05/how-to-remove-error-notices-using-wordpresss-wp_debug/ In your `wp-content` folder create a new folder called `mu-plugins` and in that folder create a php file with the error level you want, for example: If you are using PHP 5.5 +, you will get deprecated noticed for WordPress’s mysql_* functions, you can turn them off using: Or for something really  Full Article…