note 130508 added to reflectionparameter.allowsnull

The note about detecting nullability on a parameter predates "?type" and other union types. Null isn't expected to be the default if there's a defined type that allows it ("?int", "mixed", "int|string|null", etc.). <?php function foo($bar) { } (new ReflectionFunction('foo'))->getParameters()[0]->allowsNull(); // true function foo(string $bar) { } (new ReflectionFunction('foo'))->getParameters()[0]->allowsNull(); // false function foo(?string $bar) { } (new ReflectionFunction('foo'))->getParameters()[0]->allowsNull(); // true function foo(?string $bar = 'baz') { } (new ReflectionFunction('foo'))->getParameters()[0]->allowsNull(); // true (default string doesn't matter) // Note: Raises E_DEPRECATED, implicitly making parameter nullable function foo(string $bar = null) { } (new ReflectionFunction('foo'))->getParameters()[0]->allowsNull(); // true (even in strict mode, PHP <= 8) ?> ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.84.18 (proxied: 68.48.138.132) ---- Manual Page -- https://php.net/manual/en/reflectionparameter.allowsnull.php Edit -- https://main.php.net/note/edit/130508 Del: integrated -- https://main.php.net/note/delete/130508/integrated Del: useless -- https://main.php.net/note/delete/130508/useless Del: bad code -- https://main.php.net/note/delete/130508/bad+code Del: spam -- https://main.php.net/note/delete/130508/spam Del: non-english -- https://main.php.net/note/delete/130508/non-english Del: in docs -- https://main.php.net/note/delete/130508/in+docs Del: other reasons-- https://main.php.net/note/delete/130508 Reject -- https://main.php.net/note/reject/130508 Search -- https://main.php.net/manage/user-notes.php