Question: how to run activeCollab when your hosting needs a .php5 extension?

A lot of hosting solutions have both PHP4 and PHP5, on the same server. To make the difference, a file with .php extension is interpreted by PHP4, a file with PHP5 is interpreted by PHP5...

First solution: you rename every file with a php5 extension, and then you modify to code to let includes work properly, and then you pray, and then you try to find the few lines of code that are still buggy... and then you redo the same thing for every release! OK, I've done that once, thank you.

Second solution (worked for me): create a .htaccess file at the root of the aC folder.
1. Create a text file named .htaccess
2. Insert the following line:
AddType x-mapp-php5 .php
3. Drop the file on your aC folder
4. done!
(just run a phpinfo() to check!)

Notice: this directive works for my hosting (1and1). It may be different from one hosting to another. On Google, I found most of the time the following directive (not tested):
AddType application/x-httpd-php5 .php .php5

In my case I had to add one line of code to config/config.php file.
ini_set('allow_url_fopen','on');

First I tried it in .htaccess file :

php_flag allow_url_fopen on

but it just made an 'internal server error', so I decided to do what s the easiest for me
and wrote it in config.php because that file is always loaded.

I hope it will help somebody