Form still shows despite PHP condition with session -

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<?php if(!isset($_session['login']))  { ?>         <div id="login">              <form method="post" action="login.php">                 username: <input type="text" name="nm" /> <br />                 password: <input type="password" name="pass" /> <br />                 <input type="submit" name="go" value="login" />             </form>         </div>         <?php } else echo 'hi'; ?>

even though session set (value test) shows form instead of 'hi'.


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