sessions not being set in all pages on php5
<p>I am using session_start(); at the top of my login page. After a user logs in, a message is displayed on screen which shows that the session is being set. But, I cannot carry sessions from page to page or can I echo out SID. It is a blank value. I would be grateful if someone could show me where I am going wrong. Thanks</p>

<pre><code>&lt;?php

  $userpost = mysql_real_escape_string($_POST['user']);

  if (!isset($_SESSION['user'])) {
   session_start();
   $_SESSION['user'] = $userpost;
}

   echo $_SESSION['user'] .' '. 'Just logged in' .  SID;
   // Or maybe pass along the session id, if needed

?&gt;
</code></pre>
