case-insensitive str_replace

Hi, I am in need of a case-insensitive str_replace. I've tried the search the archive and documentation, but the mostly suggested thing is to use eregi_replace. But this does not really solve the problem for me since the argument for eregi_replace can't be an array. The feature that I use in str_replace is to put the 'search' and 'replace' argument as an array, as described in the documentation for php >= 4.0.5 Some people suggested some functions in the archive and documentation, but I cannot find anything that can receive arrays as the arguments. So I am wondering if anyone has a function that is fully compatible with str_replace for php > 4.0.5, but case-insensitive (something like stri_replace). I don't really want to reinvent the wheel here. Thanks in advance. Reuben D. Budiardja