在php中使用相同的数组键对多维数组进行排序[重复]答案

【问题标题】：sort multidimensional array using same array key in php [duplicate]在php中使用相同的数组键对多维数组进行排序[重复]
【发布时间】：2019-09-16 02:37:34
【问题描述】：

下面是我的多维数组：我已经根据“等级”对数组进行了排序并得到了结果。这个排序后的数组再次需要根据 'grade' 键对 'timetaken' 进行排序。

例如：有等级= 1.75，这应该按时间键排序。而grade= 2.50 应该更高，因为它高于1.75。

        $testing_data = array(
            0 => array(
                "fullname" => ' Shoping0000000000',
                "grade" => 2.5000,
                "timetaken" => 15
            ),
            1 => array(
                "fullname" => ' Vennapureddy',
                "grade" => 1.75000,
                "timetaken" => 13
            ),
            2 => array(
                "fullname" => ' Shoping1111111',
                "grade" => 1.75000,
                "timetaken" => 11
            ),
            3 => array(
                "fullname" => ' Shoping2222222',
                "grade" => 1.75000,
                "timetaken" => 90
            ),
            4 => array(
                "fullname" => ' Shoping333333333',
                "grade" => 1.7000,
                "timetaken" => 15
            ),

            5 => array(
                "fullname" => ' Azmeera',
                "grade" => 1.7000,
                "timetaken" => 67
            ),
            6 => array(
                "fullname" => 'Admin User',
                "grade" => 1.00,
                "timetaken" => 180
            ),
            7 => array(
                "fullname" => ' Shoping444444444444',
                "grade" => 1,
                "timetaken" => 15
            ),
            8 => array(
                "fullname" => ' Shoping55555555555555555',
                "grade" => 0.5000,
                "timetaken" => 290
            ),
            9 => array(
                "fullname" => ' Shoping6666',
                "grade" => 0.5000,
                "timetaken" => 120
            ),
            10 => array(
                "fullname" => ' Shoping77777',
                "grade" => 0.5000,
                "timetaken" => 187
            ),
            11 => array(
                "fullname" => ' Shoping888888',
                "grade" => 0.5000,
                "timetaken" => 20
            ),                                                                                                         
        );

我的结果数组应该是这样的：

        $testing_data = array(
            0 => array(
                "fullname" => ' Shoping0000000000',
                "grade" => 2.5000,
                "timetaken" => 15
            ),
            1 => array(
                "fullname" => ' Shoping1111111',
                "grade" => 1.75000,
                "timetaken" => 11
            ),
            2 => array(
                "fullname" => ' Vennapureddy',
                "grade" => 1.75000,
                "timetaken" => 13
            ),

            3 => array(
                "fullname" => ' Shoping2222222',
                "grade" => 1.75000,
                "timetaken" => 90
            ),
            4 => array(
                "fullname" => ' Shoping333333333',
                "grade" => 1.7000,
                "timetaken" => 15
            ),

            5 => array(
                "fullname" => ' Azmeera',
                "grade" => 1.7000,
                "timetaken" => 67
            ),
            6 => array(
                "fullname" => ' Shoping444444444444',
                "grade" => 1,
                "timetaken" => 15
            ),
            7 => array(
                "fullname" => 'Admin User',
                "grade" => 1.00,
                "timetaken" => 180
            ),
            8 => array(
                "fullname" => ' Shoping888888',
                "grade" => 0.5000,
                "timetaken" => 20
            ),              
            9 => array(
                "fullname" => ' Shoping6666',
                "grade" => 0.5000,
                "timetaken" => 120
            ),
            10 => array(
                "fullname" => ' Shoping77777',
                "grade" => 0.5000,
                "timetaken" => 187
            ),              
            11 => array(
                "fullname" => ' Shoping55555555555555555',
                "grade" => 0.5000,
                "timetaken" => 290
            ),

        );

【问题讨论】：

我看不出这两个数组有什么区别
不清楚您要做什么。从数据来看，您似乎希望按成绩降序排序，然后按时间升序排序。对吗？
您尝试过array_ 的众多功能吗？
重复帖子上的答案显示了一种按多个条件对数组进行排序的简单方法
usort比较表达式应该是$b['grade'] <=> $a['grade'] ?: $a['timetaken'] <=> $b['timetaken']

标签： php sorting multidimensional-array

【解决方案1】：

<?php
array_multisort($testing_data[0], SORT_NUMERIC, SORT_DESC,
                $testing_data[1], SORT_NUMERIC, SORT_ASC);
var_dump($testing_data);
?>

请参阅https://php.net/manual/en/function.array-multisort.php 的文档，示例 #2。

【讨论】：

【解决方案2】：

您需要使用 usort，这是一个通过用户定义的函数对数组进行排序的函数。比如：

function cmp($a, $b)
{
    if ($a["grade"] == $b["grade"]) {
        return 0;
    }
    return ($a["grade"] < $b["grade"]) ? -1 : 1;
}

usort($yourArray,"cmp")

【讨论】：

【解决方案3】：

试试这个

array_multisort(array_column($testing_data, 'grade'), SORT_DESC, SORT_NUMERIC, $testing_data);

【讨论】：