title: zip_open(); undefined on PHP 5.2.8
body: <p>I've done a bit of searching around and was unsuccessful in finding an ample solution.</p>
  
  <p>Specs are: OS X 10.5 with Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.7l DAV/2 PHP/5.2.8 </p>
  
  <p>Error:
  Fatal error: Call to undefined function zip_open() in /includes/admin_functions.php on line 18</p>
  
  <p>Thank you for your help!</p>