PHP 删除重复的数组值

Question

让我解释一下我的情况， 我给自己弄了一个多维数组。 下面是我的数组print_r。

Array
(
[0] => Array
(
[firstname] => Tinga
[lastname] => 
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 321
)
[1] => Array
(
[firstname] => Tinga
[lastname] => 
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 12
)
[2] => Array
(
[firstname] => Rijsbergen Automotive B.V.
[lastname] => 
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 311
)
[3] => Array
(
[firstname] => Mike Verhoef
[lastname] => Artis Garage Amsterdam
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 260
)
[4] => Array
(
[firstname] => Marc Kraak
[lastname] => Vakgarage TEMA
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 257
)
[5] => Array
(
[firstname] => J&B Auto's
[lastname] => 
[email] => [e-mail]
[country_code] => NL
[group] => B2B
[order_count] => 249
)
)

如您所见，有一个重复的数组，只是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 基于电子邮件 (private_information( 以最少的order_count删除重复项。(所以只保留order_count最高的那个(

有人可以在这里帮助我吗？

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;
}
}