基于子阵列值拆分PHP数组

Question

是否有PHP函数或其他解决方案,有助于根据子阵列中的值拆分数组？

是的,我知道我可以用循环做到这一点!问题是,如果没有循环,还有另一种方法可以做到这一点.

例:

使用Active的值,转动此数组...

$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
        )
)

......进入这个阵列......

$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
        )
)

......和这个数组.

$array_inactive => Array
(

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

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

)

Answer 1

你可以使用array_filter:

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

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

您也可以使用它array_reduce作为替代,但它返回索引数组,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也维护密钥时,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;
    }, [[],[]]
);