根据两个键值按 ASC 顺序对数组进行排序？

Question

我有一个存储在一个变量中的数组。数组如下：

Array
(
[0] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-11
    )

[1] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-09
    )

[2] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-10
    )
[3] => Array
    (
        [employee_name] => GURVINDER
        [today_date] => 2018-01-11
    )

[4] => Array
    (
        [employee_name] => GURVINDER
        [today_date] => 2018-01-10
    )
)

我已经完成了使用employee_name 对数组进行升序排序，这段代码运行得很好：

$attendances = "above array";
uasort($attendances, function($a, $b) {
     return strcmp($a["employee_name"], $b["employee_name"]);
 }); // this code is sorting in ascending order with employee_name.

现在我想要的是每个employee_name 应该是升序，每个employee_name today_date 也应该是升序。我的预期输出是这样的：

Array
(
[0] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-09
    )

[1] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-10
    )

[2] => Array
    (
        [employee_name] => Amit
        [today_date] => 2018-01-11
    )
[3] => Array
    (
        [employee_name] => GURVINDER
        [today_date] => 2018-01-10
    )

[4] => Array
    (
        [employee_name] => GURVINDER
        [today_date] => 2018-01-11
    )
)

请帮我解决这个问题。由于某些原因，我不会使用 SQL 查询。提前致谢。

Answer 1

根据您的输出要求，这可以正常工作。试试这个：

array_multisort(array_column($attendances, 'employee_name'),  SORT_ASC,
            array_column($attendances, 'today_date'), SORT_ASC,
            $attendances);
echo "<pre>";
print_r($attendances);

输出：-https://eval.in/935967