相关疑难解决方法(0)

我有一个如下数组:

Array
(
    [0] => Array
        (
            'name' => "Friday"
            'weight' => 6
        )
    [1] => Array
        (
            'name' => "Monday"
            'weight' => 2
        )
)

我想获取该数组中的最后一个值('weight'),并使用它来对主数组元素进行排序.所以,在这个数组中,我想对它进行排序,以便'Monday'元素出现在'Friday'元素之前.

可能重复:
PHP按包含日期的元素对多维数组进行排序

我在PHP数组中有一些来自XML或JSON的数据,如下所示:

[0]= array(2) {
    ["title"]= string(38) "Another title"
    ["date"]= string(31) "Fri, 17 Jun 2011 08:55:57 +0200"
}
[1]= array(2) {
    ["title"]= string(38) "My title"
    ["date"]= string(31) "Mon, 16 Jun 2010 06:55:57 +0200"
}

我想要做的是按日期订购这两个项目.

1. 当排序值在每个项目内时,是否可以按日期排序？
2. 我需要将日期格式转换为时间戳吗？

我不想做什么

我可以使用日期并将其设置为ID,但感觉不对,因为两个项目可以具有相同的日期,然后它不会是唯一的.

Array
        (
            [0] => Array
                (
                    [dateTime] => 2011-10-18 0:0:00
                    [chanl1] => 20.7
                    [chanl2] => 45.4
                    [chanl3] => 
                )

            [1] => Array
                (
                    [dateTime] => 2011-10-18 0:15:00
                    [chanl1] => 20.7
                    [chanl2] => 45.4
                    [chanl3] => 
                )


            [2] => Array
                (
                    [dateTime] => 2011-10-18 00:14:00
                    [chanl1] => 20.7
                    [chanl2] => 33.8
                    [chanl3] => 
                )

            [3] => Array
                (
                    [dateTime] => 2011-10-18 00:29:00
                    [chanl1] => 20.6
                    [chanl2] => 33.9
                    [chanl3] => 
                )

我想基于[dateTime]对上面的数组进行排序,最终的输出应该是:

Array
        (
            [0] => Array
                (
                    [dateTime] => 2011-10-18 …

如何重新排列这样的对象数组:

 [495] => stdClass Object
        (
         [date] => 2009-10-31 18:24:09
         ...
        )
 [582] => stdClass Object
        (
         [date] => 2010-2-11 12:01:42
         ...
        )
 ...

通过date关键,最古老的第一？

我的PHP代码中有以下数组格式:

foreach ($events as $info) {
    $events_array[] = array(
        'title' => $info->Name,
        'date'  => $info->Date
    );
}
function cb($a, $b) {
    return strtotime($a['date']) - strtotime($b['date']);
}
usort($events_array, 'cb');

编辑:日期值的格式为:YYYY-MM-DD

实际上,当我做print_r时,我明白了

[title] => SimpleXMLElement Object ( ) [date] => SimpleXMLElement Object ( )

我合并我的阵列然后我想按日期排序,但我的贷款和colls在日期有不同的名称

继承我的合并代码

 $loan = $this->db->get('loans')->result_array();
 $coll = $this->db->get('collectables')->result_array();       
 $result = array_merge($loan, $coll);

并且继承了输出

Array
(
[0] => Array
    (
        [loan_id] => 175
        [loan_fullname] => Albano, Zester Quinn
        [loan_amount] => 15000
        [loan_interest] => 2
        [loan_date] => 2017-05-30
        [loan_total_amount] => 15300
        [loan_collectables] => 1
        [loan_user_id] => 30
    )

[1] => Array
    (
        [loan_id] => 176
        [loan_fullname] => Amamio, Alyanna
        [loan_amount] => 15000
        [loan_interest] => 2
        [loan_date] => 2017-05-31
        [loan_total_amount] => 15300
        [loan_collectables] => 2
        [loan_user_id] => 32
    )

[2] => Array
    ( …

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
        )

)

这是我的阵列

[comment] => Array
        (
            [0] => Array
                (
                    [mem_id] => 51
                    [comment] => nice...
                    [profilenam] => xyz
                    [photo_thumb] => photos/81951b37ad01c4aa65662956f178214eth.jpeg
                    [date] => 1307975661
                )

            [1] => Array
                (
                    [mem_id] => 329
                    [comment] => nice...
                    [profilenam] => abc
                    [photo_thumb] => photos/f841eab12f5a24ce12b984904760c05fth.jpeg
                    [date] => 1308043486
                )

        )

实际上我想按日期按升序排列,我使用了asort()但是没有用

这是我的阵列

$array = array(
    "13111" => "2014-06-21 19:51:00.0000000",
    "23111" => "2014-06-20 19:51:00.0000000",
    "12111" => "2014-06-21 19:51:00.0000000",
    "23311" => "2014-06-22 19:51:00.0000000",
    "13114" => "2014-06-21 19:51:00.0000000",
    "23711" => "2014-06-20 19:51:00.0000000",
);

我如何获得我的数组的前3个元素,我如何按日期时间排序？谢谢