This patch allows DokuWiki to be run under _one_ alias or in an user-directory (mod_userdir).

For Dokuwiki 2009-02-14b.

--- inc/pageutils.php.old	2009-02-21 17:15:23.000000000 +0100
+++ inc/pageutils.php	2009-09-07 00:47:39.000000000 +0200
@@ -24,7 +24,12 @@
   $id = isset($_REQUEST[$param]) ? $_REQUEST[$param] : null;
 
   //construct page id from request URI
-  if(empty($id) && $conf['userewrite'] == 2){
+  if(empty($id) && $conf['userewrite'] == 2 && ! (strpos($_SERVER["SERVER_SOFTWARE"],"Apache") === false)) {
+    // use this behavior to fix alias-setups
+    $id = urldecode($_SERVER["PATH_INFO"]);
+    //strip leading slashes
+    $id = preg_replace('!^/+!','',$id);
+  } elseif(empty($id) && $conf['userewrite'] == 2){
     //get the script URL
     if($conf['basedir']){
       $relpath = '';