按时间戳对 PHP 进行数组排序
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Array Sorting PHP by timestamp
提问by Mr.Boon
I have problem ordering an array in the way I want.
我在按我想要的方式订购数组时遇到问题。
This is an example output of my array: http://pastebin.com/GJNBmqL7
这是我的阵列的示例输出：http: //pastebin.com/GJNBmqL7
Data comes from various database at once, so I'm limited in the way that I put the data into the array.
数据同时来自各种数据库，因此我将数据放入数组的方式受到限制。
The [2] always contains a linux timestamp. Now I want the entire array to be ordered by that timestamp, with the lowest value first.
[2] 总是包含一个 linux 时间戳。现在我希望整个数组按该时间戳排序，最低值在前。
How can I get that done?
我怎样才能做到这一点？
采纳答案by mjspier
here an array_multisortexample:
这里是一个array_multisort示例：
foreach ($array as $key => $node) {
$timestamps[$key] = $node[2];
}
array_multisort($timestamps, SORT_ASC, $array);
回答by Headshota
回答by Coin_op
You can do this simply by using a custom sort. So assuming your datestamp is always index 2:
您只需使用自定义排序即可完成此操作。因此，假设您的日期戳始终为索引 2：
function sortArray($a1, $a2){
if ($a1[2] == $a2[2]) return 0;
return ($a1[2] > $a2[2]) ? -1 : 1;
}
usort($array, "sortArray");
回答by Emil Vikstr?m
usortis the easiest to work with, but you can also check out array_multisort.
usort是最容易使用的，但您也可以查看array_multisort。
回答by Davinder Snehi
This can be achieved with following code.
这可以通过以下代码实现。
usort($variable, function ($a, $b) {
if ($a['timestamp'] == $b['timestamp']) {
return 0;
}
return ($a['timestamp'] < $b['timestamp']) ? 1 : -1;
});
});
This will result in sorted array of $variable, assuming time-stamp is at $variable[0]['timestamp']; $variable[0]['timestamp']; and so on.
这将导致 $variable 的排序数组，假设时间戳在 $variable[0]['timestamp']; $variable[0]['timestamp']; 等等。
回答by Joshua - Pendo
Use usort and create your own function, http://php.net/manual/en/function.usort.php
使用usort并创建自己的函数，http://php.net/manual/en/function.usort.php
回答by hsz
function cmp($a, $b)
{
if ($a[2] == $b[2]) {
return 0;
}
return ($a[2] < $b[2]) ? -1 : 1;
}
$data = array( /* your data */ );
usort($data, "cmp");
回答by Abel Mohler
It might be easier to insert the data into a single temporary table, then SELECT it, with ORDER BY timestamp
将数据插入到单个临时表中，然后使用 ORDER BY 时间戳选择它可能更容易
