PHP 删除重复的数组值

Question

让我解释一下我的情况，我给自己一个多维数组.. 下面是我数组的 print_r。

    Array
(
    [0] => Array
        (
            [firstname] => Tinga
            [lastname] => 
            [email] => private@information.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 321
        )

    [1] => Array
        (
            [firstname] => Tinga
            [lastname] => 
            [email] => private@information.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 12
        )

    [2] => Array
        (
            [firstname] => Rijsbergen Automotive B.V.
            [lastname] => 
            [email] => private@information1.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 311
        )

    [3] => Array
        (
            [firstname] => Mike Verhoef
            [lastname] => Artis Garage Amsterdam
            [email] => private@information2.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 260
        )

    [4] => Array
        (
            [firstname] => Marc Kraak
            [lastname] => Vakgarage TEMA
            [email] => private@information3.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 257
        )

    [5] => Array
        (
            [firstname] => J&B Auto's
            [lastname] => 
            [email] => private@information4.nl
            [country_code] => NL
            [group] => B2B
            [order_count] => 249
        )
)

如你所见，有一个重复的数组，只有order_count不同。

我可以使用 array_unique 轻松删除重复项，但随后它会随机删除其中一个数组（我相信）。

我想要的是删除基于电子邮件 (private_information) 的重复项，其中 order_count 的数量最少。（所以只保留最高的order_count）

有人可以帮我吗？

Answer 1

基于提供的数组的解决方案是：

$filtered = [];
foreach ($array as $item) {
    $email = $item['email'];

    if (empty($filtered[$email]) || $filtered[$email]['order_count'] < $item['order_count']) {
        $filtered[$email] = $item;
    }
}

PHP 删除重复的数组值

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