Question

How would I rewrite ( for every posts in my blog ):

http://localhost/post.php?id=13

to

http://localhost/this-is-the-title-of-the-post/13

AND ( without id )

http://localhost/post.php?id=13

to

http://localhost/this-is-the-title-of-the-post/

Answer 1

Try this rule:

RewriteEngine on
RewriteRule ^[^/]+/(\d+)$ post.php?id=$1

This will rewrite a requested URI path like /this-is-the-title-of-the-post/13 internally to /post.php?id=13; so it’s rather the other way round of what you described. But that’s how mod_rewrite works: You can only change incoming requests and not outgoing responses.

Now if you want to omit the numeric ID, your title needs to be the new ID:

RewriteRule ^this-is-the-title-of-the-post/(13)?$ post.php?id=13

That means it needs to be unique. Otherwise the title cannot be mapped onto the numeric ID unambiguously. In that case the title it would certainly be easier if you pass the title to post.php:

RewriteCond %{REQUEST_FILENAEM} !-f
RewriteRule ^([^/]+)/$ post.php?title=$1

Obviously, since the title is unique, you don’t need the numeric ID any more.