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<?php function f() {} class C { function f() {} static function s() {} function __invoke() { echo "In __invoke()\n"; var_dump(func_get_args()); } } $obj = new C; $anon = function() {}; function check_callable(callable $f) {} echo "f()\n"; check_callable('f'); var_dump(is_callable('f')); echo "C::s()\n"; check_callable(array('C', 's')); var_dump(is_callable(array('C', 's'))); check_callable('C::s'); var_dump(is_callable('C::s')); echo "Closure\n"; check_callable($anon); var_dump(is_callable($anon)); echo "C::__invoke()\n"; check_callable($obj); var_dump(is_callable($obj)); echo "C::f()\n"; check_callable(array($obj, 'f')); var_dump(is_callable(array($obj, 'f')));
Output for git.master, git.master_jit, rfc.property-hooks
f() bool(true) C::s() bool(true) bool(true) Closure bool(true) C::__invoke() bool(true) C::f() bool(true)

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