在PHP中按日期排序数组

Question

我试着按日期对array进行排序，但结果似乎没有了。正如你在下面的图片中看到的那样，0 index应该在最后。

结果：

我的守则

$next_Data = json_decode('[{"EmployeeID":102,"DateTimeRecord":"7/31/2018 9:39:13 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"7/31/2018 9:39:13 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"7/31/2018 9:39:13 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:43:04 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:43:05 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:43:06 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:13:25 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:13:25 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"8/2/2018 20:13:25 PM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/1/2018 6:13:25 PM","InOut":"0"},
                        {"EmployeeID":102,"DateTimeRecord":"8/2/2018 6:54:12 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/2/2018 6:54:12 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/2/2018 6:54:12 AM","InOut":"1"},
                        {"EmployeeID":102,"DateTimeRecord":"8/2/2018 12:13:25 PM","InOut":"0"}]');


$next_Data = array_map("unserialize", array_unique(array_map("serialize", $next_Data)));

        foreach ($next_Data as $key => $part) 
        {
            $sort[$key] = strtotime($part->DateTimeRecord);
        }

array_multisort($sort, SORT_ASC, $next_Data);

Answer 1

strtotime()为此值返回FALSE，因此它被排序为0，因此首先出现。 20:13 PM不是有效时间;它应该是8:13 PM或20:13。