小编use*_*402的帖子

有没有人知道如何在PHP中按键(日期)对此数组进行排序？

Array
(   
    [2011-02-16] => Array
        (
            [date] => 2011-02-16
            [num] => 2
        )

    [2011-02-11] => Array
        (
            [date] => 2011-02-11
            [num] => 0
        )

    [2011-02-17] => Array
        (
            [date] => 2011-02-17
            [num] => 0
        )

    [2011-02-18] => Array
        (
            [date] => 2011-02-18
            [num] => 0
        )

)