Bug #79399 [Opn->Nab]: array_map preserves keys if array_unique is used before

Edit report at https://bugs.php.net/bug.php?id=79399&edit=1 ID: 79399 Updated by: peehaa@php.net Reported by: nemanjac85 at gmail dot com Summary: array_map preserves keys if array_unique is used before -Status: Open +Status: Not a bug Type: Bug Package: Arrays related Operating System: Ubuntu 18.04 PHP Version: 7.3Git-2020-03-20 (Git) Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php > The returned array will preserve the keys of the array argument if and only if exactly one > array is passed. Previous Comments: ------------------------------------------------------------------------ [2020-03-20 16:26:18] nemanjac85 at gmail dot com Description: ------------ Function array map should produce a new numeric array containing values returned from the callback. This works fine most of the time but apparently if input array_unique is called on input array before calling array_map the new array preserves the numeric indexes. This further causes issues with json_encode and instead of array of values it encodes the objects with numeric indexes as json object keys. Calling array_values before json_encode or array_map solves the issue in userland but I think this breaks the specification of array_map. Test script: --------------- https://gist.github.com/n-e-m-a-nj-a/cd5a9a5af281e5a912c60dcc7c18227e Expected result: ---------------- { "product_ids": [ "2d0f7178-9cec-4dbe-9de2-89005735d595", "c45152d2-b6c8-4e8f-a113-c6006dad41d9", "dcb4caa4-58a5-424a-a110-cff0f3417a86", "f6696454-0d05-4975-b731-1d1201c5de46", "7aa45f2e-974c-4340-bf10-72786d554a8b", "e3303bfa-36c0-4526-94fb-6a6a0b5a814b", "7dfc4796-8784-4918-869d-3bddf0a58d30", "638f65f3-2a77-4c74-9abf-4d026a81fd65", "cac84617-b5fb-4651-9d40-19ff78ff2e72", "1a6c9a25-6f37-4e7a-87de-09c88e5f5a4a", "d178d85a-64be-48eb-985d-ddb2901a369b", "6fb1bc0a-5fe6-4807-a396-6fe3264c5b49", "9843d152-6105-476e-868c-3ca6b7353712", "dbb093de-141c-47ca-be91-ad475bb6e69d" ] } Actual result: -------------- { "product_ids": { "0": "2d0f7178-9cec-4dbe-9de2-89005735d595", "1": "c45152d2-b6c8-4e8f-a113-c6006dad41d9", "2": "dcb4caa4-58a5-424a-a110-cff0f3417a86", "3": "f6696454-0d05-4975-b731-1d1201c5de46", "4": "7aa45f2e-974c-4340-bf10-72786d554a8b", "6": "e3303bfa-36c0-4526-94fb-6a6a0b5a814b", "7": "7dfc4796-8784-4918-869d-3bddf0a58d30", "8": "638f65f3-2a77-4c74-9abf-4d026a81fd65", "9": "cac84617-b5fb-4651-9d40-19ff78ff2e72", "10": "1a6c9a25-6f37-4e7a-87de-09c88e5f5a4a", "11": "d178d85a-64be-48eb-985d-ddb2901a369b", "14": "6fb1bc0a-5fe6-4807-a396-6fe3264c5b49", "15": "9843d152-6105-476e-868c-3ca6b7353712", "17": "dbb093de-141c-47ca-be91-ad475bb6e69d" } } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79399&edit=1