set_error_hanlder.php

set_error_handler("myErrorHandler");
function myErrorHandler($errno, $errstr, $errfile, $errline){
    switch ($errno) {
    case E_USER_ERROR:
        file_put_contents('/tmp/debug.log', "[Fatal error]{$errstr} \n", FILE_APPEND);
        break;

    case E_USER_WARNING:
        file_put_contents('/tmp/debug.log', "[WARNING]{$errstr} \n", FILE_APPEND);
        break;

    case E_USER_NOTICE:
        file_put_contents('/tmp/debug.log', "[NOTICE]{$errstr} \n", FILE_APPEND);
        break;

    default:
        file_put_contents('/tmp/debug.log', "[Unknown]{$errstr} \n", FILE_APPEND);
        break;
    }
};