note 130387 added to class.weakmap

WeakMap and SplObjectStorage have different behavior when iterating in a foreach loop. While the key in SplObjectStorage is the numeric index of the inner array, in the WeakMap the key is the object reference: <?php class A {} $a = new A; $objectStorage = new SplObjectStorage (); $weakMap = new WeakMap(); $objectStorage [$a] = 1; $weakMap[$a] = 1; foreach($objectStorage as $key => $value) { var_dump($key); // prints: int(0) } foreach($weakMap as $key => $value) { var_dump($key); // prints: object(A)#1 (0) {} } ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 2001:1308:2067:da00:5147:7d63:6d7b:8699) ---- Manual Page -- https://php.net/manual/en/class.weakmap.php Edit -- https://main.php.net/note/edit/130387 Del: integrated -- https://main.php.net/note/delete/130387/integrated Del: useless -- https://main.php.net/note/delete/130387/useless Del: bad code -- https://main.php.net/note/delete/130387/bad+code Del: spam -- https://main.php.net/note/delete/130387/spam Del: non-english -- https://main.php.net/note/delete/130387/non-english Del: in docs -- https://main.php.net/note/delete/130387/in+docs Del: other reasons-- https://main.php.net/note/delete/130387 Reject -- https://main.php.net/note/reject/130387 Search -- https://main.php.net/manage/user-notes.php