Doc #80978 [Opn->Csd]: array_key_exists() does not work for false/true

Edit report at https://bugs.php.net/bug.php?id=80978&edit=1 ID: 80978 Updated by: nikic@php.net Reported by: reed dot hi at taeluf dot com Summary: array_key_exists() does not work for false/true -Status: Open +Status: Closed Type: Documentation Problem Package: Reproducible crash Operating System: Fedora 33 PHP Version: 7.4.16 -Assigned To: +Assigned To: nikic Block user comment: N Private report: N New Comment: This is supported since PHP 8.0, see https://3v4l.org/l9U34. Previous Comments: ------------------------------------------------------------------------ [2021-04-23 16:48:05] reed dot hi at taeluf dot com Description: ------------ --- From manual page: https://php.net/function.array-key-exists --- array_key_exists() returns false when checking for a key that is boolean false or true, yet the value can be accessed by $thearray[false] & array_keys($thearray) includes the boolean true/false null is not int|string, but works without issue, so I think that part is a documentation issue. Test script: --------------- $data = [false=>'happy', null=>'sad', true=>'also happy']; var_dump(array_key_exists(true, $data)); // false, PHP Warning var_dump(array_key_exists(false, $data)); // false, PHP Warning var_dump(array_key_exists(null, $data)); // true, No Warning var_dump($data[false]); // happy var_dump( in_array(false,array_keys($data)) ); // true var_dump( in_array(true,array_keys($data)) ); // true var_dump( in_array(null,array_keys($data)) ); // true Expected result: ---------------- var_dump output: true true true "happy" true true true (and no errors) Actual result: -------------- var_dump output: false false true "happy" true true true PHP Warning: array_key_exists(): The first argument should be either a string or an integer PHP Warning: (same warning again) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80978&edit=1