i具有数据阵列DINAMIC，

$methods = [];
    $result [] = ''; //result callculate save this variable;
    foreach($data as $key=>$val){
        $methods[]= $val['list_method'];
    }

我有一个数组，我正在循环，结果如下所示：

Array
(
    [0] => Array
        (
            [rekomendasi] => 1
            [select] => 236
            [method] => Array
                (
                    [0] => Array
                        (
                            [id] => 0
                            [rating] => 0
                        )

                    [1] => Array
                        (
                            [id] => 629
                            [rating] => 443.2
                        )

                )

        )

    [1] => Array
        (
            [rekomendasi] => 1
            [select] => 234
            [method] => Array
                (
                    [0] => Array
                        (
                            [id] => 620
                            [rating] => 343.43
                        )

                    [1] => Array
                        (
                            [id] => 628
                            [rating] => 345.772
                        )

                )

        )

)
1

在这种情况下，我根据索引进行计算。我做了一个如下的示例：

$result1 = 1 / (1 + (pow( 10 , ( index[0][method][0][rating] - index[0][method][1][rating])/400);
$result2 = 1 / (1 + (pow( 10 , ( index[1][method][0][rating] - index[1][method][1][rating])/400);

以前我做了代码，但我仍然对如何使计算动态感到困惑？
感谢