#phpwishlist not_null() not_string() not_callable() not_a() ... Yeah, I realize that `!` exists, but (a) fluent, and (b) can be called by name where a callable would be expected. Thoughts?


functions.php: function not_null($foo) { return !is_null($foo); } Why does this have to be on the language level?


One less external dependency for universal utility.


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