stripping white space?

Is there a way using PHP to easily strip white space out of an html page as it's being sent to the client. That is to say, the page that we as developers work on is nicely formatted, indented, etc. but when it's sent out to the client, PHP will remove all the extra white space both to obfuscate the code and reduce the size a bit. For anyone who knows Cold Fusion, I'm looking for the PHP equivalent of the "Suppress whitespace by default" option in the Cold Fusion Server Administrator. (NOTE: I'm not looking for a discussion on the merits of stripping vs. not stripping white space characters or whether or not it really does any good -- I just want to know if it can be done easily using PHP) Thanks. --kurt