问题描述
我有一个这样的多维数组:
I have an multidimensional array like this:
array ([0] => array ([id] => 1 [name] => john doe [title] => Mr [days] => 10)
[1] => array ([id] => 2 [name] => Joe Smith [title] => Dr [days] => 22)
[2] => array ([id] => 3 [name] => John Jones [title] => Mr [days] => 3))
我需要对内部数组进行排序,以便通过days键以自然顺序返回数据.
I need to sort the inner arrays so that the data is returned in natural order by the days key.
我是这样的:
array ([2] => array ([id] => 3 [name] => John Jones [title] => Mr [days] => 3)
[0] => array ([id] => 1 [name] => john doe [title] => Mr [days] => 10)
[1] => array ([id] => 2 [name] => Joe Smith [title] => Dr [days] => 22))
我认为我需要的是一个通过$ key将natsort应用于多维数组的函数,但是到目前为止,除了标准排序之外,我还找不到任何可以做其他事情的函数.
I think what I need is a function that applies natsort to a multidimensional array by $key, but so far I haven't been able to find any functions that do anything other than standard sorting.
有帮助吗?
推荐答案
您想要的是 usort
您可以编写一个回调为您做比较:
You can write a callback to do the comparison for you:
usort($data, function($a, $b) {
return ($a['days'] > $b['days'])
? 1
: ($a['days'] < $b['days'])
? -1
: 0;
});
免责声明:您需要PHP 5.3.x才能正常工作,否则必须诉诸 create_function 或预定义比较功能.
Disclaimer: You need PHP 5.3.x for this to work, else you have to resort to create_function or predefine the compare function.
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