<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<form method="post"><div>
<?php
require 'lib/NamedButtonsCaptcha.php';
$captcha = new NamedButtonsCaptcha();
$captcha->setKeyStorage(new NamedButtonsCaptcha_KeyStorage_Session());
if ('POST' === $_SERVER['REQUEST_METHOD']) {
$values = isset($_POST['nbc']) ? $_POST['nbc'] : array();
if ($captcha->isValid($values)) {
echo '<div style="color:green">Verification succeeded</div>';
} else {
echo '<div style="color:red">Verification failed</div>';
}
}
$captcha->render();
?>
<br />
<br />
<input type="submit" value="Verify" />
</div></form>
</body>
</html>
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