note 87404 added to language.oop5.magic

Be very careful to define __set_state() in classes which inherit from a parent using it, as the static __set_state() call will be called for any children. If you are not careful, you will end up with an object of the wrong type. Here is an example: class A { public $var1; public static function __set_state($an_array) { $obj = new A; $obj->var1 = $an_array['var1']; return $obj; } } class B extends A { } $b = new B; $b->var1 = 5; eval('$new_b = ' . var_export($b, true) . ';'); var_dump($new_b); /* object(A)#2 (1) { ["var1"]=> int(5) } */ ---- Server IP: 209.41.74.194 Probable Submitter: 67.165.183.32 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.magic.php Edit -- https://master.php.net/note/edit/87404 Del: integrated -- https://master.php.net/note/delete/87404/integrated Del: useless -- https://master.php.net/note/delete/87404/useless Del: bad code -- https://master.php.net/note/delete/87404/bad+code Del: spam -- https://master.php.net/note/delete/87404/spam Del: non-english -- https://master.php.net/note/delete/87404/non-english Del: in docs -- https://master.php.net/note/delete/87404/in+docs Del: other reasons-- https://master.php.net/note/delete/87404 Reject -- https://master.php.net/note/reject/87404 Search -- https://master.php.net/manage/user-notes.php