Regular Expression with HTML: Repost..

Hi there.

Posted this before but worded the question incorrect.

I'm trying to replace text in a HTML file without touching html tags at all.

Say I have.

and I want to replace html with xhtml say BUT I don't want the changed.

Any ideas?

Is this what you want?

Input:

I couldn't find a way to do that in one replace, so i used the e-modifier:

$str = preg_replace('/>[^{<]html[^<]</ie',} "preg_replace('/html/i', 'xhtml', '\0')", $str);