CAPTCHA Test
(we have an example input <form> here)
<?php $res = captcha::check(); if (isset($res)) { if ($res) { $msg = "SUCCESS!!"; } else { $msg = "FAILED."; } for ($n=0; $n<5; $n++) { echo "$msg\n"; } } ?>
This is just an example. It's function-less form, which appears over and over again. You'd typically also want to provide a more senseful error message, if captcha::test() fails.