note 118623 added to function.is-callable

From: Date: Mon, 11 Jan 2016 06:50:21 +0000
Subject: note 118623 added to function.is-callable
Groups: php.notes 
Request: Send a blank email to php-notes+get-204637@lists.php.net to get a copy of this message
If the target class has __call() magic function implemented, then is_callable will ALWAYS return TRUE for whatever method you call it. is_callable does not evaluate your internal logic inside __call() implementation (and this is for good). Therefore every method name is callable for such classes. Hence it is WRONG to say (as someone said): ...is_callable will correctly determine the existence of methods made with __call... Example: <?php class TestCallable { public function testing() { return "I am called."; } public function __call($name, $args) { if($name == 'testingOther') { return call_user_func_array(array($this, 'testing'), $args); } } } $t = new TestCallable(); echo $t->testing(); // Output: I am called. echo $t->testingOther(); // Output: I am called. echo $t->working(); // Output: (null) echo is_callable(array($t, 'testing')); // Output: TRUE echo is_callable(array($t, 'testingOther')); // Output: TRUE echo is_callable(array($t, 'working')); // Output: TRUE, expected: FALSE ?> ---- Server IP: 72.52.91.14 Probable Submitter: 117.247.230.96 ---- Manual Page -- http://php.net/manual/en/function.is-callable.php Edit -- https://master.php.net/note/edit/118623 Del: integrated -- https://master.php.net/note/delete/118623/integrated Del: useless -- https://master.php.net/note/delete/118623/useless Del: bad code -- https://master.php.net/note/delete/118623/bad+code Del: spam -- https://master.php.net/note/delete/118623/spam Del: non-english -- https://master.php.net/note/delete/118623/non-english Del: in docs -- https://master.php.net/note/delete/118623/in+docs Del: other reasons-- https://master.php.net/note/delete/118623 Reject -- https://master.php.net/note/reject/118623 Search -- https://master.php.net/manage/user-notes.php

« previous php.notes (#204637) next »