Question

如何从多维数组中删除重复值。

例如，我有一个数组：

Array
(
    [0] => Array
        (
            [fruit_id] => cea2fc4b4058
            [title] => Apple title one
            [name] => Apple
            [weight] => 22
        )

    [1] => Array
        (
            [fruit_id] => sdfsdec4b4058
            [title] => Grapefruit title one
            [name] => Grapefruit 
            [weight] => 19
        )

    [2] => Array
        (
            [fruit_id] => hjkvcbc4b4058
            [title] => Grapefruit title two
            [name] => Grapefruit
            [weight] => 17
        )

    [3] => Array
        (
            [fruit_id] => tyuutcgbfg058
            [title] => Lemon title one
            [name] => Lemon
            [weight] => 15
        )

    [4] => Array
        (
            [fruit_id] => lkjyurtws4058
            [title] => Mango title
            [name] => Mango
            [weight] => 13
        )

    [5] => Array
        (
            [fruit_id] => bner3223df058
            [title] => Lemon title two
            [name] => Lemon
            [weight] => 11
        )
)

在这个数组中，我只需要留一个重量最大的水果。我想保存所有数据，但同时删除重复的水果。谢谢。

Answer 1

您可以按weight升序排序，然后使用name作为键来创建结果，因此，weight较大的将覆盖较小的weight：< / p>

array_multisort(array_column($array, 'weight'), SORT_ASC, $array);
foreach($array as $v) { $result[$v['name']] = $v; }

然后，如果您想重新编制索引（不需要）：

$result = array_values($result);

Answer 2

尝试使用array_unique($array);代码

PHP从多维数组中删除重复的值

2 个答案: