Yeah. It's really not something you see used often since most of the time the equals operator works well enough. I remembered it being in some of the books I read when learning PHP and then did some searching to make sure it was true for PHP. I didn't find anything through Google either, but did find the page from php.net.
I can't think of a single time I've ever used either === or !== in any script or program. Just knew they existed.
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