Show index.php as index

How do I configure Apache so that if a folder doesn't contain index.html but there's an index.php it will show the php-file as the index?

Configure it in your httpd.conf follows:

DirectoryIndex index.php index.html

If you can't control the httpd.conf then you still can put this in the .htaccess.

>> there's an index.php it will show the php-file as the index?

Then you can't really use index.php.

1) You need to remove index.php from DirectoryIndex and append index to it:

DirectoryIndex index.html index

2) Force type on index file:
<FilesMatch "^index$">
ForceType application/x-httpd-php
</FilesMatch>

3) Rename all index.php to index

Thanks, got it to work