- var_dump: documentation ( source)
- uniqid: documentation ( source)
- spl_object_hash: documentation ( source)
<?php
$exception = new \exception(uniqid());
$reference = & $exception;
var_dump(spl_object_hash($reference) === spl_object_hash($exception));
var_dump(spl_object_hash($reference) === spl_object_hash($exception = new \exception(uniqid())));
$exception = spl_object_hash($exception = new \exception(uniqid()));
var_dump(spl_object_hash($reference) === spl_object_hash($exception));