php - 如何按值数据对多数组进行排序？

Question

如何按值对多个数组进行排序？ 我有这样的数据

$num_a = $_POST['num_a']; //get the value data by array num_a[]
$num_b = $_POST['num_b']; //get the value data by array num_b[]
$score = $_POST['score']; //get the value data by array socre[]

for ($i=0; $i < count($num_a); $i++) { 
    //set total data num_a and num_b with value from score
    $ring[($num_a[$i])][($num_b[$i])] = $score[$i]; 
}

print_r($ring);
//output

Array
(
    [0] => Array
        (
            [1] => 5
        )
    [1] => Array
        (
            [2] => 1
        )
    [2] => Array
        (
            [0] => 3
        )
)

如何显示按desc排序的结果，所以结果是这样的，谢谢

我想要的输出

打印_r($环);

Array
(
    [0] => Array
        (
            [1] => 5
        )
    [2] => Array
        (
            [0] => 3
        )
    [1] => Array
        (
            [2] => 1
        )
)

Answer 1

试试这个

$data = [
    0 => [ 1 => 5],
    1 => [ 2 => 1],
    2 => [ 0 => 3],        
];
uasort($data, function($a, $b) {
    $a = array_pop($a);
    $b = array_pop($b);
    if ($a == $b)
    {
        return 0;    
    }
    return ($a < $b) ? 1 : -1;
});

var_dump($data);