jquery.realperson.php

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
     "http://www.w3.org/TR/html4/strict.dtd">
<?php
function rpHash($value) {
	$hash = 5381;
	$value = strtoupper($value);
	for($i = 0; $i < strlen($value); $i++) {
		$hash = (($hash << 5) + $hash) + ord(substr($value, $i));
	}
	return $hash;
}
?>
<html>
<head>
<title>jQuery Real Person Submission</title>
<style type="text/css">
.accepted { padding: 0.5em; border: 2px solid green; }
.rejected { padding: 0.5em; border: 2px solid red; }
</style>
</head>
<body>
<h1>jQuery Real Person Submission</h1>
<?php
if (rpHash($_POST['defaultReal']) == $_POST['defaultRealHash']) {
?>
<p class="accepted">You have entered the "real person" value correctly and the form has been processed.</p>
<?php
} else {
?>
<p class="rejected">You have NOT entered the "real person" value correctly and the form has been rejected.</p>
<?php
}
?>
</body>
</html>