php session does not destroy on refresh
<p>i am making a 10 question survey with one question at a point. i made a session for passing values between questions. the thing i discovered is that the session values do not get destroyed even on a page refresh. is there a workaround or am i doing something wrong.</p>

<p>just to make things clear, here is the code:</p>

<pre><code>session_start(); 
//  $_SESSION['score'] = $score;
    $_SESSION['qnum'] = isset($_SESSION['qnum']) ? $_SESSION['qnum']+1 : 1;

    if ($_SESSION['qnum'] &lt; 10){
        $_SESSION['total'] = isset($_SESSION['total']) ? $_SESSION['total']+$score : $score;
    }
    else if ($_SESSION['qnum'] == 10){
        $_SESSION['total'] = isset($_SESSION['total']) ? $_SESSION['total']+$score : $score;
        echo "finished";
    }

    echo $_SESSION['qnum'];
    echo '\n';
    echo $_SESSION['total'];
</code></pre>
