title: PHP sessions not working in server
body: <p>I am designing a website in php.After completing it i uploaded the things in server.
  The page was working fine in localhost. But after uploading, the page is not even loading.
  At the top of every page i included a page called startsession.php. the contents of this page is as follows:</p>
  
  <pre><code>            session_start();
              header("Pragma: no-cache");
              header("Cache-Control: no-cache, must-revalidate");
              header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
  </code></pre>
  
  <p>If I remove the session_start, it is working fine. The details of error is as follows:</p>
  
  <p>Page in which Error Occured---Unknown</p>
  
  <p>Line no in which error occured---0</p>
  
  <p>Details Of the Error---Unknown(): open(/tmp/sess_723d94fdc8ae3569b1a641fd8799ece9, O_RDWR) failed: No such file or directory (2)</p>
  
  <p>Error Code---2.</p>
  
  <p>Please help me</p>