-if ((!empty($_POST['url'])) || (!empty($_GET['url'])) || (!empty($_GET['frame'])))
-{
- $url = URL;
- if (!empty($_POST['url'])) $url = $_POST['url'];
- if (!empty($_GET['url'])) $url = base64_decode(urldecode(COMPILE_CODE($_GET['url'])));
- switch ($_GET['frame'])
+if ((isPostRequestElementSet('url')) || (isGetRequestElementSet('url')) || (isGetRequestElementSet('frame'))) {
+ // Default URL is ours
+ $url = getConfig('URL');
+
+ // Decode URL if set in GET parameters
+ if (isGetRequestElementSet('url')) $url = decodeString(str_replace(' ', '+', compileUriCode(urldecode(getRequestElement('url')))));
+
+ // Use URL from POST data if set
+ if (isPostRequestElementSet('url')) $url = postRequestElement('url');
+
+ // Add missing element
+ $frame = '';
+ if (isGetRequestElementSet('frame')) $frame = getRequestElement('frame');
+ switch ($frame)