unset for session vars

git-svn-id: svn+ssh://code.netmonsters.ru/svn/majestic/trunk@63 4cb57b5f-5bbd-dd11-951b-001d605cbbc5

classes/Env.class.php

@@ -39,6 +39,18 @@ final class Env
         $_SESSION[$var] = $value;
     }
     
+    /**
+     * Unsets session var
+     * 
+     * @param string $var
+     */
+    static function unsetSession($var)
+    {
+        if (isset($_SESSION[$var])) {
+            unset($_SESSION[$var]);
+        }
+    }
+
     static function getCookie($var, $default = false)
     {
         return isset($_COOKIE[$var]) ? $_COOKIE[$var] : $default;