Topic: very simple regex question for someone who just cant code

[bertom]

Hello,
I was hoping to find an answer here on this question:

I need to convert some urls dynamically with php:
http://www.domain.com/something-variable/12345/
into
http://www.domain.com/something-variable/12345/?xx=yy

the last two parts of the url are variable, and as you can see, the the url needs a variable string attached at the end. (always the same). I told you it was easy.

I found out that this could be done through a preg_replace command, and I tried, but i have no idea how to fix this.
I am not a developer you see.

Any help is appreciated.

Thanks,
Bert

[cags]

Roughly speaking something like this...

$output = preg_replace('#http://www\.domain\.com/([a-z0-9-]+)/([0-9]+)/#i', 'http://www.domain.com/$1/$2/?xx=yy', $input);

[bertom]

Thanks for the answer Cags,
I'll give that a try.
In your example, what would the #i, the $1 and $2 stand for?
Just trying to understand.

[cags]

The i makes the pattern case insensitive. The $1 and $2 represent capture groups one and two. Basically it will insert in their places the values captured in the pattern between the corresponding set of brackets. So $1 will be the first directory in the URI and $2 it's child directory.

[bertom]

Well then this must be exactly what I need.
Thanks a lot.