The regular expression isn't an array you can foreach through

It returns a list of matches. So actually, he can.

It returns something like a true false value while the iterator is true instead.

Not with /g in list context. Even when there are no capturing parens, because then you'll still get a list of matches for the entire pattern.

So choose while instead of foreach here. See if something like this works better

It'll use less memory, but otherwise, both should have pretty much the same end result.