Bug #49889 [Asn->Wfx]: offsetExists wrong result

Edit report at http://bugs.php.net/bug.php?id=49889&edit=1 ID: 49889 Updated by: colder@php.net Reported by: carmen at helderhosting dot nl Summary: offsetExists wrong result -Status: Assigned +Status: Wont fix Type: Bug Package: SPL related Operating System: unix PHP Version: 5.3.0 Assigned To: colder New Comment: Indeed, this feels a bit odd. However, isset() internally calls offsetExists, so if offsetExists returns true(and it should) on NULLs, then isset() will also return true. Three options at hand: 1) Modify offsetExists semantics to return false on NULLs, or 2) add another magic method called by isset(). 3) Modify the semantics of isset() on objects to also call offsetGet and check the value, like empty. For which I have at least one objection each: 1+3) counter-intuitive, and would break BC 2) not worth it, given that isset() is the only special case. I believe that this is a "won't fix" scenario, sorry. Previous Comments: ------------------------------------------------------------------------ [2009-10-15 12:31:07] carmen at helderhosting dot nl Description: ------------ If $o = new ArrayObject(); $o['x'] = null; the result for isset($o['x']) it should be false, instead true is given Reproduce code: --------------- <?php $a = array(); $a['x'] = null; var_dump(isset($a['x'])); var_dump(empty($a['x'])); var_dump(array_key_exists('x', $a)); $o = new ArrayObject(); $o['x'] = null; var_dump($o->offsetExists('x')); var_dump(isset($o['x'])); var_dump(empty($o['x'])); var_dump(array_key_exists('x', $o)); ?> Expected result: ---------------- bool(false) bool(true) bool(true) bool(true) bool(false) bool(true) bool(true) Actual result: -------------- bool(false) bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=49889&edit=1