Online PHP editor | rfc for 4KdLs

@ 2021-08-27T17:29:07Z

<?php declare(strict_types=1);

/**
 * https://stackoverflow.com/a/68884808/367456
 */

$arr1 = [
    "databases" => [
        0 => [
            "id" => 1,
            "name" => "DB1",
            "slug" => "db1",
            "url" => "https://www.db1.org",
        ],
    ],
];

$arr2 = [
    "databases" => [
        0 => [
            "id" => 5,
            "name" => "DB2",
            "slug" => "db2",
            "url" => "https://www.db2.com",
        ],
    ],
];

/**
 * recursively go over two (optional) arrays old and new
 * while merging them.
 *
 * array values are then taken as:
 *
 *     ['old' => $old, 'new' => $new].
 *
 * @param array|null $old
 * @param array|null $new
 * @return array
 */
function old_and_new(array $old = null, array $new = null): array
{
    $pair = get_defined_vars();
    $map =
        static fn(callable $map, array $arrays): array => in_array(true, array_map('is_array', $arrays), true)
        && ($parameter = array_combine($k = array_keys($arrays), $k))
        && ($keys = array_keys(array_flip(array_merge(...array_values(array_map('array_keys', array_filter($arrays, 'is_array'))))))
        )
            ? array_map(
                static fn($key) => $map($map, array_map(static fn($p) => $arrays[$p][$key] ?? null, $parameter)),
                array_combine($keys, $keys)
            )
            : $arrays;

    return $map($map, $pair);
}

print_r(old_and_new(new: $arr2));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [databases] => Array ( [0] => Array ( [id] => Array ( [old] => [new] => 5 ) [name] => Array ( [old] => [new] => DB2 ) [slug] => Array ( [old] => [new] => db2 ) [url] => Array ( [old] => [new] => https://www.db2.com ) ) ) )

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

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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