diff --git a/common.php b/common.php
index 4e97e3c10..3af8e10c0 100644
--- a/common.php
+++ b/common.php
@@ -66,11 +66,13 @@ $g4     = array();
 
 function g4_path()
 {
-    $result['path'] = dirname(__FILE__);
-    $root = str_replace($_SERVER['DOCUMENT_ROOT'], '', $result['path']);
+    $result['path'] = str_replace('\\', '/', dirname(__FILE__));
+    $tilde_remove = preg_replace('/^\/\~[^\/]+(.*)$/', '$1', $_SERVER['SCRIPT_NAME']);
+    $document_root = str_replace($tilde_remove, '', $_SERVER['SCRIPT_FILENAME']);
+    $root = str_replace($document_root, '', $result['path']);
     $port = $_SERVER['SERVER_PORT'] != 80 ? ':'.$_SERVER['SERVER_PORT'] : '';
     $http = 'http' . ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']=='on') ? 's' : '') . '://';
-    $user = str_replace(str_replace($_SERVER['DOCUMENT_ROOT'], '', $_SERVER['SCRIPT_FILENAME']), '', $_SERVER['SCRIPT_NAME']);
+    $user = str_replace(str_replace($document_root, '', $_SERVER['SCRIPT_FILENAME']), '', $_SERVER['SCRIPT_NAME']);
     $result['url'] = $http.$_SERVER['SERVER_NAME'].$port.$user.$root;
     return $result;
 }