<?php session_start(); ?>
<?php include('class.captchazo.inc'); ?>
<?php
if(!empty($_POST['captchazo']) && $_SESSION['captchazo'] == $_POST['captchazo']) echo('Captcha verified');
elseif(isset($_POST['captchazo'])) echo('Captcha failed');
unset($_SESSION['captchazo']);
?>
<br/><br/>
<img src="sample_img.php" alt="captcha" />
<br/><br/>
<form method="post"><label for="captchazo">Write image text and submit</label>
<br/><input id="captchazo" type="text" name="captchazo" value="" />
<br/><input type="submit" value="Submit" /></form>
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