Bug #74077 [Opn]: Array_map with null argument inconsistency

Edit report at https://bugs.php.net/bug.php?id=74077&edit=1 ID: 74077 Updated by: cmb@php.net Reported by: remyfox at hotmail dot com Summary: Array_map with null argument inconsistency Status: Open Type: Bug -Package: Unknown/Other Function +Package: Arrays related Operating System: Windows 10 PHP Version: 7.1.1 Block user comment: N Private report: N New Comment: Alternative reproducer: <https://3v4l.org/DauMC>. Not sure if that qualifies as bug (at least changing the behavior would cause a considerable BC break), because the behavior is not well documented at all. Previous Comments: ------------------------------------------------------------------------ [2017-02-10 13:36:12] remyfox at hotmail dot com Description: ------------ In the array map documentation (http://php.net/manual/en/function.array-map.php) under #4 there is an example of using null as argument so as to make an array of arrays. This works fine for as long one item is provided to the array_map function. However, if there are is just one item provided, then the function will fail to be consistent. Test script: --------------- $two_item_array = [["abc", "def"], ["ghi", "jkl"]]; $one_item_array = [["abc", "def"]]; print_r(array_map(null, ...$two_item_array)); print_r(array_map(null, ...$one_item_array)); Expected result: ---------------- Array ( [0] => Array ( [0] => abc [1] => ghi ) [1] => Array ( [0] => def [1] => jkl ) ) Array ( [0] => Array ( [0] => abc ) [1] => Array ( [0] => def ) ) Actual result: -------------- Array ( [0] => Array ( [0] => abc [1] => ghi ) [1] => Array ( [0] => def [1] => jkl ) ) Array ( [0] => abc [1] => def ) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74077&edit=1