php - PHP 按子数组值对数组进行第 3 级排序

Question

我有一个需要按第三级排序的数组。

我需要按fullname值对数组进行排序。这可能吗？

$array = array(
    'family1' => array(
        'family_data' => array(
            'fullname' => 'Samuel Smith',
            '...' => '...'
        )
    ),
    'family2' => array(
        'family_data' => array(
            'fullname' => 'John Doe',
            '...' => '...'
        )
    ),
    'family3' => array(
        'family_data' => array(
            'fullname' => 'Adrian Chan',
            '...' => '...'
        )
    )
);

更容易阅读：

Array
(
    [family1] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Samuel Smith
                    [...] => ...
                )

        )

    [family2] => Array
        (
            [family_data] => Array
                (
                    [fullname] => John Doe
                    [...] => ...
                )

        )

    [family3] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Adrian Chan
                    [...] => ...
                )

        )

)

期望的结果是：

Array
(
    [family3] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Adrian Chan
                    [...] => ...
                )

        )

    [family2] => Array
        (
            [family_data] => Array
                (
                    [fullname] => John Doe
                    [...] => ...
                )

        )

    [family1] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Samuel Smith
                    [...] => ...
                )

        )

)

Answer 1

利用uasort

uasort — 使用用户定义的比较函数对数组进行排序并保持索引关联

uasort($array, function($a, $b) {
    return strcmp($a['family_data']['fullname'], $b['family_data']['fullname']);
});

测试：

$array = array(
    'family1' => array(
        'family_data' => array(
            'fullname' => 'Ben Smith',
            '...' => '...',
            '...' => '...'
        ),
        '...' => '...',
        '...' => '...'
    ),
    'family2' => array(
        'family_data' => array(
            'fullname' => 'John Doe',
            '...' => '...',
            '...' => '...'
        ),
        '...' => '...',
        '...' => '...'
    ),
    'family3' => array(
        'family_data' => array(
            'fullname' => 'Aen Smith',
            '...' => '...',
            '...' => '...'
        ),
        '...' => '...',
        '...' => '...'
    ),
);

uasort($array, function($a, $b) {
    return strcmp($a['family_data']['fullname'], $b['family_data']['fullname']);
});

print_r($array);

输出：

Array
(
    [family3] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Aen Smith
                    [...] => ...
                )

            [...] => ...
        )

    [family1] => Array
        (
            [family_data] => Array
                (
                    [fullname] => Ben Smith
                    [...] => ...
                )

            [...] => ...
        )

    [family2] => Array
        (
            [family_data] => Array
                (
                    [fullname] => John Doe
                    [...] => ...
                )

            [...] => ...
        )

)

Answer 2

尝试这个 ：

$sort = array();
foreach($your_array as $k=>$v) {
    $sort['fullname'][$k] = $v['family_data']['fullname'];
}

array_multisort($sort['fullname'], SORT_ASC, $your_array);


echo "<pre>";
print_r($your_array);

Answer 3

http://www.php.net/manual/en/function.array-multisort.php 看一下示例 3，我认为这会对您有所帮助。

Answer 4

按对象字段对对象数组进行排序 您可以使用 PHPusort函数 http://php.net/manual/en/function.usort.php