【PHP】連想配列向けのarray_diff

array_diffの連想配列対応バージョン

function array_diff_recursive($keys, $array1, ...$arrayn)
{
	foreach ($arrayn as $arrayi) {
		$array1 = array_udiff($array1, $arrayi, function($a, $b) use ($keys){
			foreach ($keys as $key) {
				$cmp = $a[$key] <=> $b[$key]; 
				if ($cmp) return $cmp;
			}
			return $cmp;
		});
	}

	return $array1;
}

$array1とその他いくつかの$arraynを$keysについて比較し、$array1にのみ存在する要素を返します。

<?php

$a = [
    [ 'id' => 123, 'name' => aa, 'removed' => true, 'state' => 2 ],
    [ 'id' => 4532, 'name' => bb, 'removed' => false, 'state' => 1 ],
    [ 'id' => 772, 'name' => cc, 'removed' => true, 'state' => 0 ],
    [ 'id' => 6956, 'name' => dd, 'removed' => true, 'state' => 0 ],
    [ 'id' => 832, 'name' => ee, 'removed' => false, 'state' => 1 ],
];

$b = [
    [ 'id' => 498, 'name' => ff, 'removed' => true, 'state' => 2 ],
    [ 'id' => 4532, 'name' => bb, 'removed' => false, 'state' => 1 ],
    [ 'id' => 832, 'name' => ee, 'removed' => false, 'state' => 1 ],
];

$c = [
    [ 'id' => 498, 'name' => ff, 'removed' => true, 'state' => 2 ],
    [ 'id' => 783, 'name' => gg, 'removed' => false, 'state' => 1 ],
    [ 'id' => 6956, 'name' => sd, 'removed' => true, 'state' => 0 ],
];

$d = array_diff_recursive(['id'], $a,$b,$c);
print_r(array_keys($d));
/*
Array
(
    [0] => 0
    [1] => 2
)
*/

$d = array_diff_recursive(['id','name'], $a,$b,$c);
print_r(array_keys($d));
/*
Array
(
    [0] => 0
    [1] => 2
    [2] => 3
)
*/