/**
 * @Inject
 * @var RpcClient
 */
private $rpclient;

public function rpcTest(Request $request){
    $data = [
        'class'   => 'User',
        'method'  => 'get',
        'args'    => [100,'Tom',20], // 100 是 $uid,Tom 是 $name,20 是 $age
    ];
    $buffer = json_encode($data);
    $receive_data = $this->rpclient->client($buffer);
    return $receive_data;
}
public function rpcNewTest(Request $request){
    $new_rpclient = new RpcClient();
    $data = [
        'class'   => 'User',
        'method'  => 'get',
        'args'    => [100,'Tom',20], // 100 是 $uid,Tom 是 $name,20 是 $age
    ];
    $buffer = json_encode($data);
    $receive_data = $new_rpclient->client($buffer);
    return $receive_data;
}

 $instances[$class] = new $class;

 use support\bootstrap\Container; // 頭部記得加這個

 $instances[$class] = Container::get($class);