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run code in 500+ PHP versions simultaneously

@ 2021-01-14T07:39:55Z

<?php

$a =   [
            [
                'id' => 20,
                'created_at' => '2020-11-22',
                'updated_at' => '2020-11-22 11:16:22',
                'name' => 'AA',
            ],
            [
                'id' => 19,
                'created_at' => '2020-11-27 11:16:22',
                'updated_at' => null,
                'name' => 'BB',
            ]
    ];

$b =   [
            [
                'id' => 20,
                'created_at' => '2020-11-22 11:16:11',
                'updated_at' => '2020-11-22 11:16:22',
                'name' => 'AA',
            ],
            [
                'id' => 19,
                'created_at' => '2020-11-27 11:16:22',
                'updated_at' => null,
                'name' => 'BB',
            ]
    ];


function array_diff_by_keys(array $a, array $b, array $keys = null)
{
    if (empty($keys)) $keys = array_keys(reset($a));
    
    $compare = function ($x, $y) use ($keys) {
        foreach ($keys as $key) {
            $diff = $x[$key] <=> $y[$key];
            if ($diff) return $diff;
        }
        return $diff;
    };

    return array_udiff($a, $b, $compare);
}

print_r(array_diff_by_keys($a, $b));
print_r(array_diff_by_keys($a, $b, ['id', 'created_at', 'updated_at']));

Output for 8.4.1 - 8.4.23, 8.5.0 - 8.5.8: Deprecated: array_diff_by_keys(): Implicitly marking parameter $keys as nullable is deprecated, the explicit nullable type must be used instead in /in/1dPON on line 34 Array ( [0] => Array ( [id] => 20 [created_at] => 2020-11-22 [updated_at] => 2020-11-22 11:16:22 [name] => AA ) ) Array ( [0] => Array ( [id] => 20 [created_at] => 2020-11-22 [updated_at] => 2020-11-22 11:16:22 [name] => AA ) )
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32: Array ( [0] => Array ( [id] => 20 [created_at] => 2020-11-22 [updated_at] => 2020-11-22 11:16:22 [name] => AA ) ) Array ( [0] => Array ( [id] => 20 [created_at] => 2020-11-22 [updated_at] => 2020-11-22 11:16:22 [name] => AA ) )

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