The example script below fails to catch parse errors (line 12 is a parse error):

<?php

 error_reporting(E_ALL);
 
 $old_error_handler = set_error_handler("myErrorHandler"); 

 function myErrorHandler($errno, $errstr, $errfile, $errline) 
 {
   echo "Hi, I am an error of type: '$errno' wit message: '$errmsg'<br>\n";
 }

 print;

?>