Bug->Req #60039 [Opn]: array_key_exists behaves different from isset for float keys

Edit report at https://bugs.php.net/bug.php?id=60039&edit=1 ID: 60039 Updated by: cataphract@php.net Reported by: nikic@php.net Summary: array_key_exists behaves different from isset for float keys Status: Open -Type: Bug +Type: Feature/Change Request Package: Arrays related PHP Version: 5.4.0beta1 Block user comment: N Private report: N New Comment: It's very arguable whether the behavior of the two should match. A argument for the current behavior would go like this: in $a = [4 => "hhh"], the key 4.5 doesn't exist, so key_exists should return false; on the other hand $a[4.5] exists and is not null, so isset should return true. There are some problems with this argument, namely that key_exists actually rejects the arguments (it sends a warning) and that there is a very slight mismatch between isset and array dereferencing, but it's just to show this is not a bug (violation of well established specifications), but instead a feature request that merits more discussion. Previous Comments: ------------------------------------------------------------------------ [2011-10-11 12:19:09] nikic@php.net The following patch has been added/updated: Patch Name: array_key_exists_patch.txt Revision: 1318335549 URL: https://bugs.php.net/patch-display.php?bug=60039&patch=array_key_exists_patch.txt&revision=1318335549 ------------------------------------------------------------------------ [2011-10-11 12:18:40] nikic@php.net Description: ------------ array_key_exists allows only string, int and null keys. For everything else it'll throw an error. isset on the other hand allows floats, resources and bools too. floats are cast to int and resources and bools are handled as ints. array_key_exists behavior should match isset behavior. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60039&edit=1