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<?php
   session_start();
   
   if (isset($_SESSION['counter'])) {
      $_SESSION['counter']++;
   } else {
      $_SESSION['counter'] = 1; 
   }

   
   $msg = "You have visited this page ".  $_SESSION['counter'];
   $msg .= "in this session.";
   
   echo ( $msg );
?>

<p>
   To continue  click following link <br />
   
   <a  href = "nextpage.php?<?php echo htmlspecialchars(SID); ?>">
</p>