PHP实现一个二维码同时支持支付宝和微信支付的示例

//我的url指向了checkTerrace方法
$url  = self::ADMIN_URL . 'params=' . $params; 
//ADMIN_URL是生成二维码的url，请替换成自己

public function checkTerrace()
  {
   $pay_type = $this->getPayType(); //该方法使用来判断用户扫码终端的
   $params  = $this->request->get('params'); //生成二维码url带的参数(看个人需求，我的项目需要额外参数)
   $params  = $this->desDecode($params); //这里是因为我对参数进行了desc加密，看个人需求
   if ($pay_type === 'alipay') { //如果用户是通过支付宝扫码，进行支付宝相关操作
       if ($params === false) {
         echo "系统错误!，请稍后重试";
         exit;
       }
       $res = $this->createOrder($pay_type, $params);
       if (!$res) {
         echo "系统错误，请稍后重试";
         exit;
       }
       $this->aliPay($res);
   } elseif ($pay_type === 'wechat') { //如果用户是通过微信扫码，进行微信相关操作
       if ($params === false) {
         echo "系统错误，请稍后重试";
         exit;
       }
       $prepare = $this->wechat($pay_type, $params);
       $this->assign('json', $prepare);
       return $this->display('wpay.html');
   } elseif ($pay_type === false) {
       echo "请使用支付宝或微信进行扫码";
       exit;
   }
 }

/**
 * 判断扫码终端
 *
 * @return string|boolean
 * @date 2021-02-04
 */
 private function getPayType()
 {
   if (strstr($_SERVER['HTTP_USER_AGENT'], 'AlipayClient')) {
     return "alipay";
   } elseif (strstr($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger')) {
     return "wechat";
   } else {
     return false;
   }
 }

  /**
   * 生成订单
   *
   * @param string $pay_type
   * @param json $params
   * @return void
   * @date 2021-02-04
   */
  //这个逻辑就不贴代码了
  private function createOrder($pay_type, $params)
  {
    /*生成订单相关逻辑代码*/
  }

/**
   * 唤起支付宝app
   *
   * @param array $api_params
   * @return void
   * @date 2021-02-04
   */
  private function aliPay($api_params)
  {
    $config = [
      'notify_url'     => '异步回调地址',
      'is_open_certificate' => true
    ];
    $domain = urlencode($api_params['domain']);
    $api = [
      'out_trade_no'  => $api_params['trade_no'],
      'total_amount'  => '0.01',
      'subject'     => '商品标题',
      'passback_params' => $domain
    ];
    $pay = new Pay($config); 
    $res = $pay->driver('alipay')->gateway('wap')->pay($api); //调用支付宝手机网站支付
    echo $res;
  }

/**
   * 唤起微信app 
   *
   * @return void
   * @date 2021-02-04
   */
  public function wechat($pay_type, $params)
  {
    $opend_id = $this->getOpenId(); //处理微信jsapi支付之前，要先获取用户的openID
    if (!$opend_id) {
      echo "微信授权失败...";
      exit;
    }
    $api_params = $this->createOrder($pay_type, $params); //用户openID获取成功后才进行订单生产操作
    if (!$api_params) {
      echo "系统错误，请稍后重试";
      exit;
    }
    $config = ['notify_url'  => '微信异步回调地址'];
    $api  = [
      'body'     => '我是标题',
      'out_trade_no' => $api_params['trade_no'],
      'total_fee'  => 1,  
      'openid'    => $opend_id,
      'attach'    => $api_params['domain']
    ];
    $pay = new Pay($config);
    $res = $pay->driver('wechat')->gateway('mp')->pay($api); //调用微信jsapi支付
    return $res;
  }

/**
   * 获取用户的openid
   *
   * @return void
   * @date 2021-02-04
   */
  public function getOpenId()
  {
    if (isset($_SESSION['open_id']) && $_SESSION['open_id']) {
      return $_SESSION['open_id'];
    }
    if (!$this->request->get('code')) {
      $redirect_uri = $_SERVER['REQUEST_SCHEME'] . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; //这里授权后微信跳转的地址，要写在订单处理处，否则会造成因为程序跳转到微信授权页面，导致脚本逻辑终止
      $redirect_uri = urlencode($redirect_uri);
      $url = $this->codeUrl . 'redirect_uri=' . $redirect_uri . '&appid=' . $this->appId . '&scope=snsapi_base&response_type=code&state=STATE#wechat_redirect'; //使用用户静默授权模式(因为我不需要获取用户信息所有就没采用用户手段授权模式)
      header("location:{$url}"); //跳转到微信授权页面
    } else {
      $openidurl = $this->openidUrl . 'appid=' . $this->appId . '&secret=' . $this->appSecret . '&code=' . $this->request->get('code') . '&grant_type=authorization_code';
      $data = Http::get($openidurl);
      $data = json_decode($data, true);
      if ($data['openid']) { 
        $_SESSION['open_id'] = $data['openid']; //获取到的用户openID存储到session中
      } else {
        $_SESSION['open_id'] = false;
      }
      return $_SESSION['open_id'];
    }
  }

$(function() {

      $("#code").qrcode({
 //jQuery生成二维码
        width: 165, //宽度
        height: 167, //高度
        text: $('input[name="url"]').val() 
      });
      var startTime = Date.parse(new Date())/1000;
      //设置定时器
      var poll_request = setInterval( function() {
          $.ajax({
            url: '/company/StoreSetting/checkStatus',
            data:{time:startTime},
            dataType:'json',
            type:'get',
            success:function(res) {
              if (res.code == 400) {
                var result = clearTimer(poll_request, startTime);
                if (result) {
                  var html = `<img src="/Static/images/paybg.png">`+
                        `<div class="notify" id="notify">`+
                        `<img src="/Static/images/pay_time_out.png" alt="">`+
                        `<span class="pay_tip">点击重新获取</span>`+
                        `</div>`;
                  $('.qrcode-img').empty();
                  $('.qrcode-img').append(html);
                }
              } else if(res.code == 500) {
                var html = `<img src="/Static/images/paybg.png">`+
                        `<div class="notify">`+
                        `<img src="/Static/images/pay_error.png" alt="">`+
                        `<span class="pay_tip">已扫码<br>请在手机端操作</span>`+
                        `</div>`;
                $('.qrcode-img').empty();
                $('.qrcode-img').append(html);
                clearTimer(poll_request, startTime);
              } else if(res.code == 200) {
                clearInterval(poll_request)
                layer.msg("支付成功", {icon:6}, function() {
                  window.location.reload()
                })
                // layer.msg("支付成功", {icon:6}, function() {
                  
                // })
              }
            }
          })
      }, 2000);
    })
    function clearTimer(index, startTime) {
      if (((Date.parse(new Date())/1000) - startTime) > 60) {
        clearInterval(index)
        return 'reload';
      }
      return false;
    }
    //刷新二维码
    $('.qrcode-img').on("click", '#notify', function() {
      $('.qrcode-img').empty()
      $("#code").qrcode({
        width: 165, //宽度
        height: 167, //高度
        text: $('input[name="url"]').val() 
      });
      var startTime = Date.parse(new Date())/1000;
      var poll_request = setInterval( function() {
          $.ajax({
            url: '/company/StoreSetting/checkStatus',
            data:{time:startTime},
            dataType:'json',
            type:'get',
            success:function(res) {
              if (res.code == 400) {
                var result = clearTimer(poll_request, startTime);
                if (result) {
                  var html = `<img src="/Static/images/paybg.png">`+
                        `<div class="notify" id="notify">`+
                        `<img src="/Static/images/pay_time_out.png" alt="">`+
                        `<span class="pay_tip">点击重新获取</span>`+
                        `</div>`;
                  $('.qrcode-img').empty();
                  $('.qrcode-img').append(html);
                }
              } else if(res.code == 500) {
                var html = `<img src="/Static/images/paybg.png">`+
                        `<div class="notify">`+
                        `<img src="/Static/images/pay_error.png" alt="">`+
                        `<span class="pay_tip">已扫码<br>请在手机端操作</span>`+
                        `</div>`;
                $('.qrcode-img').empty();
                $('.qrcode-img').append(html);
                clearTimer(poll_request, startTime);
              } else if(res.code == 200) {
                clearInterval(poll_request)
                layer.msg("支付成功", {icon:6}, function() {
                  window.location.reload()
                })
                // layer.msg("支付成功", {icon:6}, function() {
                  
                // })
              }
            }
          })
      }, 2000); 
    })