When I coded
BunnyRegex, I just coded it with no thought towards those who use PHP4. I actually don't feel bad about this, there are really so many good reasons to upgrade to PHP5. At any rate, I did decide that making a PHP4 version wouldn't be to difficult, so here it is:
BunnyRegex with a PHP4 version. Besides the addition of a .php4 file, there is no other difference.
I am pretty sure that it will work on PHP4, but not 100% positive, so please test it out, and let me know. I don't have the will to install a php4 interpreter at the moment.