Hello

… I want to use my little forum for a big online shopping website, but I do not trust it for SEO.
I was wondering if you could add some SEO features to it. Something like friendly url.

Friendly URLs are a myth. Search engines mainly analyses a pages content. A self speaking URL-path (if it is, what you mean with "friendly URL") is nice. It makes the URL much more human readable, but that's all it actually does.

Additionally we would have to support two systems of URLs, the old one with URL-parameters and a second with a (virtual?) speaking path. And if this wouldn't be enough, we had to support it for different writing systems. This would lead to encoded URLs that was completely unreadable for humans. A transformation of your subject in English language would be easy. Even in german language it would be readable, although there was an umlaut ("for" => "für") that has to be encoded. But i.e. an arabic or a chinese subject would be completely unreadable. The page of the PHP manual for the relevant function rawurlencode provides an example in the user contributed notes.

<?php
echo 'http://example.com/', mb_rawurlencode('你好');
?>

The above example will output: http://example.com/%e4%bd%a0%e5%a5%bd

This is absolutely not worth any hassle.

If you have any further ideas beside from that, please present it here.

Tschö, Auge