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<?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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