$ composer require yansongda/laravel-pay

use Yansongda\Pay\Pay;

/**
 * Class SecondPay
 * @package App
 * 支付宝手机网页支付接口
 */
class ZfbWapPay extends Model
{

 //发送支付请求
 public function send(Request $request,$outTradeNum,$payAmount)
 {
  $config = config('pay.alipay'); //取出配置信息，根据需求动态改变
  $config['return_url'] ='http://api.aiwangyouxi.com/web/pay/jump/'.$outTradeNum;

  $order = [
   'out_trade_no' => $outTradeNum, //我方订单号
   'total_amount' => $payAmount, //支付金额，单位(元)
   'subject' => '游戏支付',
  ];

  $alipay = Pay::alipay($config)->wap($order);
  return $alipay; //返回form表单信息
 }
}

$("body").append(data.form_text);

use Yansongda\Pay\Pay;

/**
 * Class WxwebController
 * @package App\Http\Controllers\Web
 * 支付宝h5支付回调
 */
class ZfbwebController extends Controller
{
 private $pay_order;  //我方订单号
 private $call_order; //第三方订单号

 public function notify(Request $request)
 {
  $pay_config = config('pay.alipay');
  $alipay = Pay::alipay($pay_config);

  $this->pay_order = $request->out_trade_no;
  $this->call_order = $request->trade_no;

  $save_back = $m_pay_back->addback($this->pay_order,json_encode($request->all())); //将支付回调信息记录到数据库中
  $check_result = $alipay->verify();
  if(!$check_result) { //回调验签失败
   return '';
  }

  return $alipay->success();
 }
}