<?
   session_start();
   // include security image class
   require_once('./lib/security-image-class.php');

   // get parameters
   isset($_GET['width']) ? $iWidth = (int)$_GET['width'] : $iWidth = 360;
   isset($_GET['height']) ? $iHeight = (int)$_GET['height'] : $iHeight = 50;
  
   // create new image
   $oSecurityImage = new SecurityImage($iWidth, $iHeight);
   if ($oSecurityImage->CreateQuestion())
   {
      // assign corresponding code to session variable 
      // for checking against user entered value
	  print $oSecurityImage->GetCode();
	  
      $_SESSION['code'] = $oSecurityImage->GetCode();
   }
   else
   { echo 'Image GIF library is not installed.'; };
?>