Form Data Filtering

Hello, I 'm checking form data for profanity but it only works if the $_POST['var'] is lowercase I was wondering if anyone knew how I could catch the profanity no matter what case it was. No matter if it was BAD or bad or mixed like BaD? Instead of the long way: if ($value == "fuck" || $value == "shit" || $value == "whore" || $value == "shit" || $value == "bullshit" || $value == "ass" || $value == "asshole" || $value == "piss" || $value == "bitch" || $value == "bastard" || $value == "motherfucker" || $value == "pussy" || $value == "cunt" || $value == "slut" || $value == "hell" || $value == "goddamn" || $value == "skank" || $value == "Tit" || $value == "dick" || $value == "hoe") { $profanity[$field] = "bad"; } Any suggestions welcome.