使用两个值对数组进行排序

Question

我正在尝试使用两个值（order，sub_order）对数组进行排序，以便它们是1.1,1.2,2.1,2.1等命令。

下面是现在的数组示例，第二个是按order和sub_order值正确排序的数组。

Array
(
    [0] => Array
        (
            [id] => 1
            [order] => 1
            [sub_order] => 2
            [title] => Blah 
        )

    [1] => Array
        (
            [id] => 3
            [order] => 2
            [sub_order] => 2
            [title] => Blah 
        )

    [2] => Array
        (
            [id] => 2
            [order] => 1
            [sub_order] => 1
            [title] => Blah 
        )

    [3] => Array
        (
            [id] => 4
            [order] => 2
            [sub_order] => 1
            [title] => Blah 
        )

)

正确订购......

Array
(
    [0] => Array
        (
            [id] => 2
            [order] => 1
            [sub_order] => 1
            [title] => Blah 
        )

    [1] => Array
        (
            [id] => 1
            [order] => 1
            [sub_order] => 2
            [title] => Blah 
        )

    [2] => Array
        (
            [id] => 4
            [order] => 2
            [sub_order] => 1
            [title] => Blah 
        )

    [3] => Array
        (
            [id] => 3
            [order] => 2
            [sub_order] => 2
            [title] => Blah 
        )

)

任何帮助都会很棒。

Answer 1

使用usort

usort($array, "order_sub_order_sort");
function order_sub_order_sort($a, $b) {
    if ($a["order"] != $b["order"]) {
        return $a["order"] - $b["order"];
    }
    return $a["sub_order"] - $b["sub_order"]
}

如果您想要反过来排序，请更改$a-$b的{​​{1}}。我总是忘记哪个是上升的，哪个是下降的。