they're request for code execution, not for value
(remember, not all functions return values as they most important effect -
it's not Haskell).
Calling non-existing function returns in fatal error in PHP; it's the same
for:
$object->iHaveNoSuchMethod();
$null->method();
give you some information, but
you cannot fully trust this header, as it might not be sent, or be malformed.
--
Paweł Stradomski
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