3v4l.org

run code in 300+ PHP versions simultaneously

@ 2019-09-17T14:02:33Z

<?php

$arr = [
    0 =>
    [
        "id"    => "1",
        "color" => "red",
    ],
    1 =>
    [
        0 =>
        [
            "id"    => "2",
            "color" => "blue",
        ],
        1 =>
        [
            0 =>
            [
                "id"    => "3",
                "color" => "green",
            ],
        ],
        2 =>
        [
            "id"    => "4",
            "color" => "blue",
        ],
    ],
    2 =>
    [
        "id"    => "5",
        "color" => "purple",
    ],
];
function flattenArray($arr = [])
{
    $retArr = [];
    foreach ($arr as $val) {
        if (is_array($val)) {
            $retArr[] = array_filter($val, function ($v) {
                return !is_array($v);
            });
            $retArr = array_merge(array_filter($retArr), flattenArray($val));
        }
    }
    return $retArr;
}
$arr = flattenArray($arr);
print_r($arr);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [id] => 1 [color] => red ) [1] => Array ( [id] => 2 [color] => blue ) [2] => Array ( [id] => 3 [color] => green ) [3] => Array ( [id] => 4 [color] => blue ) [4] => Array ( [id] => 5 [color] => purple ) )

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

preferences:dark modelive previewkey bindings

41.4 ms | 406 KiB | 5 Q