需要通过多个键中的重复值组合 PHP 数组

Question

我有一个包含超过 1000 个值的数组。该数组在 php 文件中，我会将结果 return 发送到另一个数组以输出到 excel 文件。将不胜感激

Array
(
[0] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => PXB
        [low] => 24.99
    )
[1] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => PXB
        [low] => 31.99
    )
[2] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => PXB
        [low] => 38.99
    )
[3] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => MXB
        [low] => 24.99
    )
[4] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => MXB
        [low] => 31.99
    )
[5] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => MXB
        [low] => 38.99
    )
[6] => Array
    (
        [isbn] => 97845684978
        [price] => 30.99
        [po] => PXB
        [low] => 18.99
    )
[7] => Array
    (
        [isbn] => 97845684978
        [price] => 30.99
        [po] => PXB
        [low] => 19.99
    )
[8] => Array
    (
        [isbn] => 97845684978
        [price] => 30.99
        [po] => PXB
        [low] => 23.99
    )
)

我需要能够对数组和 return 输出进行排序，每个 po 都有一个 isbn，保持该 po 的最低值 low。我需要按 isbn、po 和 low 排序。所以我正在寻找一个输出：

 Array
(
[0] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => PXB
        [low] => 24.99
    )
[1] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => MXB
        [low] => 31.99
    )
[2] => Array
    (
        [isbn] => 97845684978
        [price] => 30.99
        [po] => PXB
        [low] => 18.99
    )
[3] => Array
    (
        [isbn] => 97845684684
        [price] => 30.99
        [po] => MXB
        [low] => 15.99
    )

Answer 1

使用usort过滤低价：

$array = //your array

function cmp($a, $b) {
    if ($a['po'] == $b['po'] && $a['isbn'] == $b['isbn']) {
       return ($a['low'] < $b['low']) ? -1 : 1;
    }else{
        return 0;
    }

}

usort($array, 'cmp');

Foreach 循环重新填充数组。

$po = null;
$isbn = null;
$result = [];
foreach($array as $key =>$val){    
    if($val['po']==$po && $val['isbn']==$isbn){
    }else{
        $result[] = $val; 
    }
    $isbn = $val['isbn'];
    $po = $val['po'];
}
echo '<pre>';
print_r($result);
echo '</pre>';

需要通过多个键中的重复值组合 PHP 数组

Need To combine PHP array by duplicate values in mulitple keys

php

arrays

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