To output any PHP errors you might have, simply add the following at the top of your PHP file

<?php
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);

// any other code that you might think contains errors
?>

Or add the following to your php.ini file:

display_errors = on

This should display the errors. Make sure to restart your webserver; if you have Apache, use:

apachectl -k graceful