PHP:根据自定义条件查找和删除重复的多维数组元素

Question

这是我的数组:

$productsArray = [
    '0' => [
        'id' => 1,
        'code' => 1000,
        'in_promo' => 1,
    ],
    '1' => [
        'id' => 2,
        'code' => 1000,
        'in_promo' => 3,
    ],
];

我需要检查是否存在具有相同'code'和'in_promo' => 1和3的元素，并删除具有'in_promo' => 1的元素，以支持具有'in_promo' => 3的元素。如何用PHP数组函数做到这一点?
谢谢。

Answer 1

$productsArray = [
    '0' => [
        'id' => 1,
        'code' => 1000,
        'in_promo' => 1,
    ],
    '1' => [
        'id' => 2,
        'code' => 1000,
        'in_promo' => 3,
    ],
    '10' => [
        'id' => 3,
        'code' => 1000,
        'in_promo' => 2,
    ],
    '11' => [
        'id' => 4,
        'code' => 1001,
        'in_promo' => 3,
    ],
];
$hasPromoNeedle = array_filter($productsArray, function (array $array)
{
    return in_array($array['in_promo'], [1, 3]);
});
print_r(array_filter($hasPromoNeedle, function (array $array1, $k1) use ($hasPromoNeedle) {
    foreach ($hasPromoNeedle as $k2 => $array2)
    {
        if ($array1['code'] == $array2['code'] and $k1 != $k2)
        {
            return true;
        }
    }
    return false;
}, ARRAY_FILTER_USE_BOTH ));