Altering the error_reporting

I am looking for a way to alter the error_reporting(E_All) This displays Parse error: parse error, unexpected '}' in /var/www/html/test.php on line 7 I want to remove the file location and line number from the error to only produce Parse error: parse error, unexpected '}' Why? You may ask. I am writting a code tester in php but i do not want to display the "in" portion. This will make you find the error on your own. As a learning tool. Understand I have error reporting off in the php.ini file and call the errors in the php script with ini_set('display_errors', 1);. I am sure this is doable I just cant figure out how to do this without altering the php.ini file.