This snippest is for getting errors on currnet working directory.

logErrors.php

<?php

if (function_exists ('ini_set')){
    //prevent display errors
    ini_set("display_errors", 0);
    //but log them
    ini_set('log_errors', 1 );
    //in the document root
    ini_set('error_log', getcwd().'/error.log' );
}
    echo $test;