根据子数组值拆分PHP数组

Question

是否有PHP函数或其他解决方案可帮助根据子数组中的值拆分数组？

是的，我知道我可以循环执行此操作！ 问题是是否还有另一种方法可以避免循环。

例：

使用Active的值，旋转此数组...

$array_all => Array
(
    [126] => Array
        (
            [DisplayName] => Customer ABC
            [Active] => 1
        )

    [1596] => Array
        (
            [DisplayName] => Customer 123
            [Active] => 0
        )

    [1648] => Array
        (
            [DisplayName] => John Q Sample
            [Active] => 1
        )

    [1649] => Array
        (
            [DisplayName] => Fry & Leela, Inc.
            [Active] => 0
        )

    [1571] => Array
        (
            [DisplayName] => Class Action: Redshirts vs. UFP 
            [Active] => 1
        )
)

...进入这个数组...

$array_active => Array
(
    [126] => Array
        (
            [DisplayName] => Customer ABC
            [Active] => 1
        )

    [1648] => Array
        (
            [DisplayName] => John Q Sample
            [Active] => 1
        )

    [1571] => Array
        (
            [DisplayName] => Class Action: Redshirts vs. UFP 
            [Active] => 1
        )
)

...以及这个数组。

$array_inactive => Array
(

    [1596] => Array
        (
            [DisplayName] => Customer 123
            [Active] => 0
        )

    [1649] => Array
        (
            [DisplayName] => Fry & Leela, Inc.
            [Active] => 0
        )

)

Answer 1

您可以使用array_filter ：

$actives = array_filter($array_all, function ($row) {
    return $row["Active"];
}); 

$notActives = array_filter($array_all, function ($row) {
    return !$row["Active"];
}); 

您也可以使用array_reduce作为替代，但是它返回索引数组，因此没有原始键：

list($actives, $notActives) = array_reduce($array_all, function ($result, $row) {
    $result[$row["Active"]][] = $row;
    return $result;
}, [[],[]]);

当使用array_reduce还维护键时，它变得非常冗长：

list($actives, $notActives) = array_reduce(array_keys($array_all), 
    function ($result, $key) use ($array_all) {
        $result[$array_all[$key]["Active"]][$key] = $array_all[$key];
        return $result;
    }, [[],[]]
);