Because the php.ini file is for the entire server that you are on, which has thousands of accounts, you cannot change it. You can however use the below code at the beginning of each of your files, which will temporarily change the settings while that script is running, you will have to use it for every script that you want to run.
PHP:
<?php
ini_set('display_errors', 'off');
?>
In your case, it appears that you are missing a file, could you please check that you have the includes/rating_config.php file in the correct location.