按日期排序数组 php

Question

数组键是日期，想按日期升序排列数组。以下是数组：

Array
(
    [07/14/2017] => Array
        (
            [ID] => 5442
            [post_content] => Test1
            [post_title] => Testevents1
        )

    [01/11/2017] => Array
        (
            [ID] => 5443
            [post_content] => Test2
            [post_title] => Testevents2
        )
)

Answer 1

您可以使用 uksort 来实现。

uksort — 使用用户定义的比较函数按键对数组进行排序

function cmp($keyA, $keyB)
{
    // Your date parsing and comparison

    // The comparison function must return an integer less than, equal to, 
    // or greater than zero if the first argument is considered to be respectively 
    // less than, equal to, or greater than the second. 
    // Note that before PHP 7.0.0 this integer had to be in the range 
    // from -2147483648 to 2147483647.
}

uksort($arr, "cmp")

Answer 2

您可以使用 uksort 来做到这一点：

uksort($arr, function ($a, $b) {
    $t1 = strtotime($a);
    $t2 = strtotime($b);
    if ($t1 == $t2) {
        return 0;
    }
    return ($t1 > $t2) ? 1 : -1;
});

按日期排序数组 php

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