Question

我需要根据[百分比]排序的数组，例如：STU102是第1，STU100是第2，STU100是第3，基于这些方式我需要得到输出，任何人都可以帮助我。我试过了，当我使用这种方法时，

function cmp($a, $b) {
  return $b[7]["percentage"] - $a[7]["percentage"];
}
usort($per_details1, "cmp");

它被分类了。但我直接给了$ b [7] [＆＃34;百分比＆＃34;] - $ a [7] [＆＃34;百分比＆＃34;]第7个索引。

Answer 1

使用usort 在PHP和arraywalk

function sort($a, $b) {
    if ($a['percentage'] == $b['percentage']) return 0;
    return ($a['percentage'] > $b['percentage']) ? 1 : -1;
}

function sort(&$value) {
    usort($value, 'sort');
}

array_walk($array, 'sort');

Answer 2

循环遍历数组并使用NonUniqueResultException按子数组中的usort()字段对它们进行排序。在percentage循环中使用引用变量，以便它在阵列上运行。

foreach

Answer 3

混合使用array_walk和usort;你可以完成工作。下面的代码说明了如何。

简介：完成工作

    <?php

        // FIRST; SORT THE MAIN ARRAY IN REVERSE ORDER...
        rsort($mdArray);

        // IF YOU WANT TO SORT BY ANY OTHER FIELD, SAY "EmpId"
        // YOU CAN SIMPLY CHANGE THE DEFAULT VALUE OF $field to "EmpId"
        function sortByField($prev, $next, $field="percentage") {
            return $next[$field] - $prev[$field];
        }

        array_walk($mdArray, function(&$data){
            usort($data, "sortByField");
        });

详细信息：使用示例数组：

    <?php
        $mdArray    = array(
            array (
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 15, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 78, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 20 ,"max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 10, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 77, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 34, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 22, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 78, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 49, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 55, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 36, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU100", "EmpName" => "XXXXXX", "percentage" => 18, "max_point" => null, "opt_point" =>  null,)
            ),
            array (
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 70, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 54, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 23, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 46, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 10, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 21, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 80, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 34, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 50, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 27, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 39, "max_point" => null, "opt_point" => null, ),
                array( "EmpId" => "STU101", "EmpName" => "YYYYY", "percentage" => 12, "max_point" => null, "opt_point" => null, ),
            ),
        );


        // FIRST; SORT THE MAIN ARRAY IN REVERSE ORDER...
        rsort($mdArray);

        // IF YOU WANT TO SORT BY ANY OTHER FIELD, SAY "EmpId"
        // YOU CAN SIMPLY CHANGE THE DEFAULT VALUE OF $field to "EmpId"
        function sortByField($prev, $next, $field="percentage") {
            return $next[$field] - $prev[$field];
        }

        array_walk($mdArray, function(&$data){
            usort($data, "sortByField");
        });

        var_dump($mdArray);

上面的var_dump会产生类似下面的结果。现在请注意，数组按降序中的百分比排序。如果您想要逆转流程（即按升序排序），只需在函数内部（{1}}内部$next和$prev交换。

sortByField

测试here。

Answer 4

发布时，您确实应该格式化代码。

您可以使用PHP的用户来完成您之后的工作。请参阅accepted answer here。

function cmp($a, $b) {
    return $a["mid"] - $b["mid"];
}
usort($arr, "cmp");

此外，虽然我们很乐意在此处提供帮助，但您也应该对自己的问题进行一些自己的研究。

PHP在数组中排序数组

4 个答案: