The documentation of preg_replace_callback() states that it is functioning exactly like preg_replace(), except for the second argument, that should be a 'callback'.

This is the current text:
"The behavior of this function is almost identical to preg_replace(), except for the fact that instead of replacement parameter, one should specify a callback that will be called and passed an array of matched elements in the subject string. The callback should return the replacement string. This function was added in PHP 4.0.5."

I think this is way too vague, and most of all, incorrect.  Though the functionality is similar, it is not 'almost identical'.  First of all, the callback-variant of this function is (in my release, 4.2.3) not capable of detecting multiple patterns and passing them to multiple callback-functions.  Secondly, there is the item that is discussed in the (English) user comments in the online version of this function, namely that when you try to call a member function of a class from within that class, you have to pass it an Array with as first element a reference to $this, and then, secondly the callback-function.

Actually, I am not a very experienced php-user, and normally, I would not post this bug, but somebody in the php.doc-newsgroup encouraged me to do so, so this is it ...

I hope I can help the huge community I try to become a member, gets a little improved by my first cotribution to it ...

Greetz,
Bikeman