php小程序支付代码

// pages/pay/pay.js

Page({

  /**
   * 页面的初始数据
   */
  data: {
  
  },


  payInput: function (e) {
    console.log(e)
    this.setData({
      userN: e.detail.value
    })
  },


     loginBtnClick: function () {
     
       getApp().onLaunch(function (openid) {
         var openid = JSON.stringify(openid.data)
     
         wx.setStorageSync("openid",openid)

       })

       var openid = wx.getStorageSync('openid')

    if (this.data.userN.length <= 0 ) {
      this.setData({
        infoMess: '温馨提示：请输入正确的金额！',
      })
    } else {
      
     
      wx.request({
       
        url: 'https://gong.90plus.cn/app/Pay/payfee', //你服务器code.php文件地址，默认GET。小程序只支持https ，
        method: 'POST',
        header: {
          'content-type': 'application/x-www-form-urlencoded'
        },
        data: {
          money: this.data.userN,
          openid:openid,
        },
        success: res => {
          console.log(res.data);
          console.log('调起支付');
          wx.requestPayment({
            'timeStamp': res.data.timeStamp,
            'nonceStr': res.data.nonceStr,
            'package': res.data.package,
            'signType': 'MD5',
            'paySign': res.data.paySign,
            'success': function (res) {
              console.log('success');
              wx.showToast({
                title: '支付成功',
                icon: 'success',
                duration: 3000
              });
            },
            'fail': function (res) {
              console.log('fail');
            },
            'complete': function (res) {
              console.log('complete');
            }
          });

         },
          fail: function (res) {
           console.log(res.data)
         }
      })
    }
   
  },

})

 weixinapp($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body);

echo json_encode($return);

 }
/*
   public function pay($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body) {
        //统一下单接口
        $return = $this->weixinapp($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body);
        return $return;
    }

*/
   //微信小程序接口
    private function weixinapp($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body) {
        //统一下单接口
       $unifiedorder = $this->unifiedorder($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body);
//        print_r($unifiedorder);
        $parameters = array(
            'appId' => $appid, //小程序ID
            'timeStamp' => '' . time() . '', //时间戳
            'nonceStr' => $this->createNoncestr(), //随机串
           'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包
            'signType' => 'MD5'//签名方式
        );
        //签名
        $parameters['paySign'] = $this->getSign($parameters);
        return $parameters;
    }


  private function createNoncestr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

  //作用：生成签名
    private function getSign($Obj) {
        foreach ($Obj as $k => $v) {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters);
        //签名步骤二：在string后加入KEY
        $String = $String . "&key=" . "dEbcFGd5ZD26p6ObM7slW3FeoFXIFXMA";
        //签名步骤三：MD5加密
        $String = md5($String);
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        return $result_;
    }



	  ///作用：格式化参数，签名过程需要使用
    private function formatBizQueryParaMap($paraMap) {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
           
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;


	
    }


	    private function unifiedorder($total_fee,$openid,$appid,$mch_id,$key,$out_trade_no,$body) {
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $parameters = array(
            'appid' => $appid, //小程序ID
            'mch_id' => $mch_id, //商户号
            'nonce_str' => $this->createNoncestr(), //随机字符串
//            'body' => 'test', //商品描述
            'body' => $body,
//            'out_trade_no' => '2015450806125348', //商户订单号
            'out_trade_no'=> $out_trade_no,
//            'total_fee' => floatval(0.01 * 100), //总金额 单位 分
            'total_fee' => $total_fee,
//            'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
            'spbill_create_ip' => '116.62.121.247', //终端IP
            'notify_url' => 'http://www.weixin.qq.com/wxpay/pay.php', //通知地址  确保外网能正常访问
            'openid' =>$openid, //用户id
			
            'trade_type' => 'JSAPI'//交易类型
			
        );
        //统一下单签名
        $parameters['sign'] = $this->getSign($parameters);
      
        $xmlData = $this->arrayToXml($parameters);
        $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
        return  $return;
    }

	 private function xmlToArray($xml) {


        //禁止引用外部xml实体 


        libxml_disable_entity_loader(true);


        $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);


        $val = json_decode(json_encode($xmlstring), true);


        return $val;
    }

	    //数组转换成xml
    private function arrayToXml($arr) {
        $xml = "
 
  ";
        foreach ($arr as $key => $val) {
            if (is_array($val)) {
                $xml .= "<" . $key . ">" . arrayToXml($val) . "
  ";
            } else {
                $xml .= "<" . $key . ">" . $val . "
  ";
            }
        }
        $xml .= "
 ";
        return $xml;
    }

	  private static function postXmlCurl($xml, $url, $second = 30) 
    {
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);


        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
        curl_setopt($ch, CURLOPT_TIMEOUT, 40);
        set_time_limit(0);


        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);
            throw new WxPayException("curl出错，错误码:$error");
        }
    }

}