如何支持任意多个参数传入调用 Redis 的 sUnion ( PHP )?

[zilan]

避免使用 eval，或者迭代地调用 2 个

效果大概像这样：

    function unionSets($redis, $keys)
    {
        if (!is_array($keys)) {
            return [];
        }
        $count = count($keys);
        $ret = [];
        switch ($count)
        {
            case 2:
                $ret = $redis->sUnion($keys[0], $keys[1]);
                break;
            case 3:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2]);
                break;
            case 4:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3]);
                break;
            case 5:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3], $keys[4]);
                break;
            case 6:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3], $keys[4], $keys[5]);
                break;
            case 7:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3], $keys[4], $keys[5], $keys[6]);
                break;
            case 8:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3], $keys[4], $keys[5], $keys[6], $keys[7]);
                break;
            case 9:
                $ret = $redis->sUnion($keys[0], $keys[1], $keys[2], $keys[3], $keys[4], $keys[5], $keys[6], $keys[8], $keys[8]);
                break;
            default:
                $ret = $redis->sUnion($keys[0], $keys[1]);
                break;
        }
        return $ret;
    }

[echodone]

func_get_args()、func_get_arg()与 func_num_args()，研究下这几个函数就可以了

[zilan]

@echodone 考虑过，关键是调用而不是被调用

[suit]

$redis->sUnion(...$keys);
call_user_func_array([$redis, 'sUnion'], $keys);

[zilan]

@suit 感谢，忘记了
下沉了