- var_dump: documentation ( source)
- base64_decode: documentation ( source)
<?php
var_Dump(false != imagecreatefromstring(base64_decode('R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==').'<script language = php>die("\nYahooo");</script>'));