按键值排序数组 [英] Order array by key value
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问题描述
大家好.应该很简单,因为我的稍有不同,所以无法在其他问题上找到正确的答案.
Hey guys. Should be simple, couldn't find a proper answer on other questions because mine is slightly different.
我有一个数组,像这样:
I have an array, like this:
Array
(
[0] => Array
(
[record_id] => 21
[quality] => 3
)
[1] => Array
(
[record_id] => 20
[quality] => 3
)
[2] => Array
(
[record_id] => 19
[quality] => 3
)
[3] => Array
(
[record_id] => 18
[quality] => 2
)
[4] => Array
(
[record_id] => 17
[quality] => 3
)
)
我需要能够以升序或降序(选择模式时)从最高到最低(关于quality
键)对数组进行排序,所以例如,我需要它对数组进行排序并返回有序,例如
I need to be able to order the array by highest to lowest (regarding the quality
key) in ascending order or descending (when a mode has been selected), so for example I need it to order an array and return it ordered, e.g.
function order_array($array, $order = 'asc')
{
if($order == 'asc')
// order the array from lowest to highest
if($order == 'desc')
// order the array from highest to lowest
}
干杯.
推荐答案
检查 usort 功能
function cmp($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
$a = array(3, 2, 5, 6, 1);
usort($a, "cmp");
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