How was a URL like http://stackoverflow.com/posts/1807421/edit created in PHP?

Question

When you edit a question on stackoverflow.com, you will be redirected to a URL like this:

https://stackoverflow.com/posts/1807421/edit

Answer 1

It's indeed done by mod_rewrite, or with multiviews. But i prefer mod_rewrite.

First: you create a .htaccessfile with these contents:

RewriteEngine On
RewriteRule ^posts/([0-9])/(edit|delete)$ /index.php?page=posts&postId=$1&action=$2

Obvious, mod_rewrite must be enabled by your hostingprovider ;)