Question

如何在PHP中使用条件对数组进行排序？我希望按ID排序的数组然后按ID中的父ID 排序，而不是在ID 之后。这样做的原因是将其实现为jQuery TreeGrid。

例如：

func

排序后，变成这样：

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
    )
)

Answer 1

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 ()：

缩短上述示例

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

Answer 2

使用此代码。它会起作用

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

array_multisort($id,SORT_ASC,$parent_id,SORT_ASC,$data);

PHP数组[排序+分组]

2 个答案: