在php

Question

Mysql查询：

select id, ad_click, contact_submit, MONTH(datetime) as months, YEAR(datetime) years from wpxc_leaderboard_counters order by datetime

它以这种方式显示结果：

Array ( 
    [0] => Array ( 
        [0] => stdClass Object ( 
            [id] => 2 [ad_click] => 0 [contact_submit] => 0 [datetime] => 2019-11-01 
        ) 
        [1] => stdClass Object ( 
            [id] => 3 [ad_click] => 0 [contact_submit] => 0 [datetime] => 2019-11-01 
        ) 
        [2] => stdClass Object ( 
            [id] => 4 [ad_click] => 1 [contact_submit] => 0 [datetime] => 2019-11-01 
        ) 
        [3] => stdClass Object ( 
            [id] => 5 [ad_click] => 0 [contact_submit] => 1 [datetime] => 2019-11-01 
        ) 
        [4] => stdClass Object ( 
            [id] => 1 [ad_click] => 3 [contact_submit] => 2 [datetime] => 2019-12-06 
        ) 
    )
)

但想以这种方式显示：

Array ( 
    [0] => Array ( 
        [11] => stdClass Object ( 
            [id] => 2 [ad_click] => 0 [contact_submit] => 0 [datetime] => 2019-11-01 
            [id] => 3 [ad_click] => 0 [contact_submit] => 0 [datetime] => 2019-11-01 
            [id] => 4 [ad_click] => 1 [contact_submit] => 0 [datetime] => 2019-11-01 
            [id] => 5 [ad_click] => 0 [contact_submit] => 1 [datetime] => 2019-11-01 
        )
        [12] => stdClass Object ( 
            [id] => 1 [ad_click] => 3 [contact_submit] => 2 [datetime] => 2019-12-06 
        ) 
    )
)

希望这可以通过修改数组来实现，因为我使用了不同的方法并且花费了很多时间，但仍未实现。

Answer 1

在获取查询结果时，可以将日期的子字符串用作数组键。

while ($row = $query->fetch_object()) {
    $result[substr($row->datetime, 5, 2)][] = $row;
}

您显示的数组与查询不完全匹配。如果您已经在查询中选择MONTH，则无需使用substr。您可以使用

$result[$row->months][] = $row;

我还建议您考虑按年份和月份进行分组，以用于将来的排序目的，但是由于您的查询是按日期时间排序的，因此目前这可能无关紧要。这取决于您打算如何使用分组数据，但是如果将Year作为密钥的一部分，则可以确保组将始终正确排序。