On 20 September 2015 00:29:48 BST, Lester Caine <les...@lsces.co.uk> wrote: >> The notices emitted by is_null are COMPLETELY IRRELEVANT. > >? is_null returns true if the variable exists and is NULL and throws a >notice if the variable is not set WHY is that fact COMPLETELY >IRRELEVANT?
is_null returns true in all the same situations as isset does. There is absolutely no difference except for whether it raises a notice. > we have to put up with the notices because there is no CLEAN >way to establish that a variable exists only that it is set. You absolutely never have to put up with those notices, because if you use !isset instead of is_null, they go away, and the program continues to work in exactly the same way. I understand that you would like a function to detect the (non-)existence of a variable, and are disappointed that isset is not that function, but that's a completely separate problem from how to avoid the notices. Again, it is not the noise which is stopping your car from flying. Regards, -- Rowan Collins [IMSoP] -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
