Question

我用数据库中的数据填充了这个数组

$collectTable1 = array( 'errand' => $interest->errand_id,
                        'timestamp' => $interest->timestamp,
                        'type' => $interest->type,
                        'amount' => $interest->amount
                    );

$collector[] = $collectTable1;

我想像这样对时间戳进行排序

$sortTime = rsort($collectedData['timestamp']);

我尝试了这个，我得到了这个输出

 function timesort($a, $b) {


 return (intval($a['timestamp']) > intval($b['timestamp']));
}

usort($collector, "timesort");

2017-12-01 10:53:26

我想我从下降的日期点开始吗？就像是 2018-09-04 12:32:16

我的时间戳还包含unixtimestamp和常规日期，例如“ 2017-12-01 10:53:26“

Answer 1

我猜你在$collector中有元素数组。

如果您想按timestamp对它们进行排序，则可以使用usort

考虑以下示例：

$collector = array();
$e1 = array("errand" => 1, "timestamp" => "2017-12-01 10:53:26");
$e2 = array("errand" => 2, "timestamp" => "2018-07-01 10:53:26");
$e3 = array("errand" => 3, "timestamp" => "2018-12-01 10:53:26");

$collector = array($e1, $e2, $e3);

function cmp($a, $b)
{
    return (strtotime($a['timestamp']) < strtotime($b['timestamp']));
}

usort($collector, "cmp");

当您的timestamp值是字符串时，请使用strtotime将它们转换为EPOC，然后再进行比较。

现在，$collector数组元素按timestamp值排序。

代码示例的输出为：

Array
(
    [0] => Array
        (
            [errand] => 3
            [timestamp] => 2018-12-01 10:53:26
        )
    [1] => Array
        (
            [errand] => 2
            [timestamp] => 2018-07-01 10:53:26
        )
    [2] => Array
        (
            [errand] => 1
            [timestamp] => 2017-12-01 10:53:26
        )
)

Answer 2

一旦有了阵列：

<?php

$data = [
    ['timestamp' => '100'],
    ['timestamp' => '300'],
    ['timestamp' => '200']
];

usort($data, function($a, $b) {
    return $b['timestamp'] <=> $a['timestamp'];
});

var_export($data);

输出：

array (
    0 => 
    array (
    'timestamp' => '300',
    ),
    1 => 
    array (
    'timestamp' => '200',
    ),
    2 => 
    array (
    'timestamp' => '100',
    ),
)

Answer 3

如果关联数组$ collectTable1的所有键的值比

多

foreach($interest as $i){
$collectTable1 = array( 'errand' => array($i->errand_id),
                        'timestamp' => array($i->timestamp),
                        'type' => array($i->type),
                        'amount' => array($i->amount)
                    );


rsort($collectTable1[‘timestamp’]);

在这里，collectTable1是一维数组的关联数组。

$ collectTable1 [‘timestamp’] [0] = firstvalue $ collectTable1 ['timestamp'] [1] = secondvalue

依此类推

这是数组吗？

3 个答案: