已解决代码参数代入即可：        $signData = [             'offerId'      => $merchantConfig['offerId'],             'buyQuantity'  => (int)bcmul($order['pay_price'], (string)100), //            'buyQuantity'  => 1,             'env'          => 0,             'currencyType' => 'CNY',             'outTradeNo'   => $order['order_no'],             'attach'       => 'pay'         ];         $signDataStr = json_encode($signData);         $orderParams = [             'signData' => $signDataStr,             'mode'     => 'short_series_coin', //代币直充         ];         $orderParams['paySig'] = hash_hmac('sha256', 'requestVirtualPayment&' . $signDataStr, $merchantConfig['appKey']);         $orderParams['signature'] = hash_hmac('sha256', $signDataStr, $session['session_key']);