bad word filter

Hello everyone, I've been reading the "Profanity Filter" thread in the list archives but haven't found anything real helpful. Here's my code so far, this of course won't work. <? function filterWords($string, &$result) { $badwords="shit, fuck, ass, bitch"; $word=explode(", ", $badwords); for ($i=0; $i<count($word); $i++) { $replace = str_replace("$word[$i]", "****", $string); } } $string = "Ass monkey"; filterWords("$string", $result); print "$result"; ?> How can I scan for the $badwords in $string and replace $badwords with ****? Thanks, Tyler Longren Captain Jack Communications tyler@captainjack.com www.captainjack.com