Replace all string patterns with a string variable.

[flash gordon]

I can't seem to get this for the life of me. Maybe a hint would help. Here is what I'm trying to do
[code]
<Parent id="7">
  <child />
  <child />
</Parent>
<Parent id="2">
  <child />
  <child />
</Parent>
<Parent id="44">
  <child />
  <child />
</Parent>
[/code]
To make it look like this:
[code]
<Parent id="0">
  <child />
  <child />
</Parent>
<Parent id="1">
  <child />
  <child />
</Parent>
<Parent id="2">
  <child />
  <child />
</Parent>
[/code]
I'm sure there is an easy way and I'm over complicating the issue. Any tips?
:)

btw, I have tried preg_replace() but I seem to replace all patterns with the same string. I need the id to increment....

[.josh]

are you reading this file line by line or is ^ one giant string?

if it's one giant string, I think you're probably going to have to use preg_match_all or explode to break it up somehow, so that you can loop your preg_replace.

[flash gordon]

I'm reading it with fopen, so however that reads it, but I do store the entire page as one String variable. I eventually did get it to work for a client, but I'm positive there are better ways.

Thanks for the reply.
:)