我需要在php中根据值对数组进行排序，数组使用一些数字作为键和值，例如:
i need to sort an array in php based on value, array use some numbers for keys and values, for example like this:
$a = array(70 => 1 ,82 => 5 ,61 => 3 ,55 => 1 ,34 => 2 ,53 => 2 ,21 => 4 ,13 => 5);我喜欢这样排序:
Array ( [82] => 5 [13] => 5 [21] => 4 [61] => 3 [34] => 2 [53] => 2 [70] => 1 [55] => 1 )我使用了 arsort 并且它工作了，但是有一个问题，因为这个函数将默认排序的 keys 和排序数组更改为:
i used arsort and it worked, but there is a problem because this function make change defult sorted keys and sort array to:
Array ( [13] => 5 [82] => 5 [21] => 4 [61] => 3 [53] => 2 [34] => 2 [55] => 1 [70] => 1 ) 推荐答案构造一个新数组，其元素是原始数组的键、值和位置:
Construct a new array whose elements are the original array's keys, values, and also position:
$temp = array(); $i = 0; foreach ($array as $key => $value) { $temp[] = array($i, $key, $value); $i++; }然后使用考虑原始位置的用户定义顺序进行排序:
Then sort using a user-defined order that takes the original position into account:
uasort($temp, function($a, $b) { return $a[2] == $b[2] ? ($a[0] - $b[0]) : ($a[2] < $b[2] ? 1 : -1); });最后，将其转换回原来的关联数组:
Finally, convert it back to the original associative array:
$array = array(); foreach ($temp as $val) { $array[$val[1]] = $val[2]; }