[Phpwiki-talk] PhpWiki and Apache 2.0.40, problems and solutions

[Matti A. <ma...@ik...>]

Hi!

I just hacked together a PhpWiki site using the latest nightly PhpWiki
tar package and Apache 2.0.40 with PHP 4.2.3 provided by Mandrake 9.0.
In the process I stumbled into something I think must be a bug.

But first, the setup:

PhpWiki resides in /phpwiki (relative to docroot). I tried to make the
PATH_INFO stuff to work as described in index.php and PhpWiki Wiki
pages, by making /wiki and putting the following lines to .htaccess:

Action x-phpwiki-page /phpwiki/index.php
SetHandler x-phpwiki-page
DirectoryIndex /phpwiki/index.php

Instead of a working Wiki I got 404's. Clearly, the handler delegation
didn't work with Apache 2.0. After a huge amount of trials and errors I
ended up with a seemingly working setup:

/wiki/.htaccess:
--clip--
DirectoryIndex /phpwiki/index.php
RewriteEngine On
RewriteBase /wiki/
RewriteRule ^(.+)$ /phpwiki/index.php/$1 [QSA]
--clip--

also, a following line has to be added to 
/phpwiki/.htaccess:

AcceptPathInfo on

With these settings, the Home Page loaded correctly. The problem was, I
only got the Home Page, no matter where I went. 

Now, after another huge amount of trials and errors, I narrowed the
problem down to PATH_INFO_PREFIX setting. The variables are set as
follows:

_SERVER["REQUEST_URI"]		/wiki/AddingPages 
_SERVER["SCRIPT_NAME"]		/phpwiki/index.php 
_SERVER["PATH_INFO"]		/AddingPages 
_SERVER["PATH_TRANSLATED"]	/var/www/mairas.net/html/AddingPages 
_SERVER["PHP_SELF"]		/phpwiki/index.php/AddingPages 

However, PhpWiki assumes that PATH_INFO has the VIRTUAL_PATH (in this
case '/wiki') as prefix. As can be noted, that isn't the case.

I found out the following patch fixes the problem for me (TM):

--clip----clip----clip----clip----clip----clip----clip----clip----clip--
--- /tmp/phpwiki/lib/config.php 2002-09-27 16:40:34.000000000 +0300
+++ lib/config.php      2002-10-31 22:09:29.000000000 +0200
@@ -336,7 +336,13 @@

 if (VIRTUAL_PATH != SCRIPT_NAME) {
     // Apache action handlers are used.
-    define('PATH_INFO_PREFIX', VIRTUAL_PATH . '/');
+    // There are differences in Apache versions in rgd. to how
PATH_INFO is
+    // assembled. Test what the prefix should look like.
+    if
(substr($HTTP_SERVER_VARS['PATH_INFO'],0,strlen(VIRTUAL_PATH))==VIRTUAL_PATH) {
+        define('PATH_INFO_PREFIX', VIRTUAL_PATH . '/');
+    } else {
+        define('PATH_INFO_PREFIX', '/');
+    }
 }
 else
     define('PATH_INFO_PREFIX', '/');
--clip----clip----clip----clip----clip----clip----clip----clip----clip--

The fix may not be pretty, but without it PhpWiki does not work for me.
Please consider applying it to the CVS.

Best regards,

Matti Airas