PHP 数组 [排序 + 分组] - PHP Array [Sorting + Grouping]

PHP Array [Sorting + Grouping]

本文关键字：分组排序数组 PHP | 更新日期: 2023-09-27

如何在 PHP 中使用条件对数组进行排序？我希望数组按 ID 排序，然后按 ID 内的父 ID 排序，而不是在 ID 之后排序。这样做的原因是将其实现到 jQuery TreeGrid 中。

例如：

Array 
(
[0] => Array
    (
        [0] => 1 //ID
        [1] => TEST //Name
        [2] => 1 //Parent ID
    )
[1] => Array
    (
        [0] => 2 //ID
        [1] => TEST //Name
        [2] => 2 //Parent ID
    )
[2] => Array
    (
        [0] => 3 //ID
        [1] => TEST //Name
        [2] => 3 //Parent ID
    )
[3] => Array
    (
        [0] => 4 //ID
        [1] => TEST //Name
        [2] => 1 //Parent ID
    )
[4] => Array
    (
        [0] => 5 //ID
        [1] => TEST //Name
        [2] => 2 //Parent ID
    )
)

排序后，变成这样：

Array 
(
[0] => Array
    (
        [0] => 1 //ID
        [1] => TEST //Name
        [2] => 1 //Parent ID
    )
[1] => Array
    (
        [0] => 4 //ID
        [1] => TEST //Name
        [2] => 1 //Parent ID
    )
[2] => Array
    (
        [0] => 2 //ID
        [1] => TEST //Name
        [2] => 2 //Parent ID
    )
[3] => Array
    (
        [0] => 5 //ID
        [1] => TEST //Name
        [2] => 2 //Parent ID
    )
[4] => Array
    (
        [0] => 3 //ID
        [1] => TEST //Name
        [2] => 3 //Parent ID
    )
)

您可以使用

array_multisort（）。

//get lists to sort by
foreach ($your_array as $key => $value) {
    $id_array[$key]        = $value[0];
    $parent_id_array[$key] = $value[2];
}
//sort first by `id` ascending, then by `parent_id` ascending
array_multisort ($id_array, SORT_ASC, $parent_id_array, SORT_ASC, $your_array);

您甚至可以使用 array_orderby () 来缩短上述示例：

$your_array = array_orderby ($your_array, 0, SORT_ASC, 2, SORT_ASC);

使用此代码。它会工作

foreach ($data as $key => $row) {
    $id[$key] = $row[0];
    $parent_id[$key] = $row[2];
}
array_multisort($id,SORT_ASC,$parent_id,SORT_ASC,$data);