根据内部值对多数组进行排序

Question

我有这个数组

[Computers] => Array
(
    [0] => Array
        (
            [product_id] => 78
            [category_name] => Computers
            [sort_order] => 1
        )
    [1] => Array
        (
            [product_id] => 70
            [category_name] => Computers
            [sort_order] => 1
        )
)

[Scanners] => Array
(
    [0] => Array
        (
            [product_id] => 65
            [category_name] => Scanners
            [sort_order] => 6
        )
)
[Printers] => Array
(
    [0] => Array
        (
            [product_id] => 58
            [category_name] => Printers
            [sort_order] => 3
        )
)
[Screens] => Array
(
    [0] => Array
        (
            [product_id] => 62
            [category_name] => Screens
            [sort_order] => 2
        )
)

我似乎找不到根据关键字sort_order对数组进行排序的方法。我尝试了这里的所有例子，但没有成功。我需要这个顺序的阵列

Computers
Screens
Printers
Scanners

Answer 1

试用

function aasort (&$array, $key) {
    $sorter=array();
    $ret=array();
    reset($array);
    foreach ($array as $ii => $va) {
            foreach ($array[$ii] as $i => $val) {
                $sorter[$ii]=$val[$key];
            }
    }
    asort($sorter);
    foreach ($sorter as $element => $value) {
        $ret[$element]=$array[$element];
    }
    $array=$ret;
}
 aasort($array,"sort_order");

Answer 2

您只是在错误的级别上使用了排序参数。你想对最高级别进行排序，对吗？所以把排序参数也放在那里。以下数据结构更有意义：

[Computers] => Array
(
    [sort_order] => 1,
    [data] => array(
        [0] => Array
            (
                [product_id] => 78,
                [category_name] => Computers,
                [sort_order] => 1,
            )
    )
)

如果你在数据结构中嵌套尽可能深的排序顺序，就会产生糟糕的排序算法。

Answer 3

这应该足够了：

uasort($yourArray,
       create_function('$a,$b','return $a[0]["sort_order"] > $b[0]["sort_order"];'));