在索引值對中，如何根據value大小得到key的排序？

如：

 $test={"A":1,"B":3,"C":2,"D":1,"E":1};

得到：

$result={"B":3,"C":2,"A":1,"D":1,"E":1};試過rsort($test),不行。很像sql語句中的orderby,能否有辦法？

回複內容：

如：

 $test={"A":1,"B":3,"C":2,"D":1,"E":1};

得到：

$result={"B":3,"C":2,"A":1,"D":1,"E":1};試過rsort($test),不行。很像sql語句中的orderby,能否有辦法？

看看文檔

>>> arsort($test)>>> $test=> [     "B" => 3,     "c" => 2,     "e" => 1,     "d" => 1,     "A" => 1,   ]

function cmp($a, $b){if ($a == $b) {    return 0;}return ($a < $b) ? -1 : 1;}$a = array(3, 2, 5, 6, 1);usort($a, "cmp");foreach ($a as $key => $value) {echo "$key: $value\n";}

可以看下這個函數 array_multisort

