微信小程序实现微信支付功能

时间:2023-02-22 09:59:35

这里我直接上代码,附有注释,直接把我的代码粘贴一下就可以用了,也是自己走了好多的弯路。。,写在博客里做个记录

直接把里面的参数替换成你的就可以了,前提是你要开通的有微信支付功能,需要商户号,appid,appsecret,openid,

openid的获取比较简单,我再写一篇博客做介绍,不懂得可以私聊我

//小程序端代码:

pay: function (){
var that= this
wx.getStorage({
key: 'openid' ,
success: function (res) {
wx.request({
//这里是后台的处理方法,url是自定义的,直接换成你自己的后台处理方法即可,Wx_Pay这个方法在下面写的有
//后台用的php做处理,java的可以参考方法,道理都是一样的
url: url + 'Wx_Pay' ,
data: {
//用户的openid
openid:res.data,
fee: that.data.totalPrice, //支付金额
details: that.data.goodsList[ 0 ].goods_name,//支付商品的名称
},
success: function (result){
if (result.data){
//out_trade_no=res.data['out_trade_no'];
wx.requestPayment({
timeStamp: result.data[ 'timeStamp' ],
nonceStr: result.data[ 'nonceStr' ],
package : result.data[ 'package' ],
signType: 'MD5' ,
paySign: result.data[ 'paySign' ],
'success' : function (successret){
console.log( '支付成功' );
//获取支付用户的信息
wx.getStorage({
key: 'userInfo' ,
success: function (getuser) {
//加入订单表做记录
wx.request({
url: url + 'Wx_AddOrder' ,
data: {
uname: getuser.data.nickName,
goods: that.data.goodsList[ 0 ].goods_name,
price: that.data.totalPrice,
openid:res.data,
},
success: function (lastreturn) {
console.log( "存取成功" );
}
})
},
})
}, 'fail' : function (res){
}
})
}
}
})
},
})
},

//后台

//微信支付
    public function Wx_Pay(){
        $request=Request::instance();
        $fee=$request->param('fee');
        $details=$request->param('details');//商品的详情,比如iPhone8,紫色
       // $fee = 0.01;//举例充值0.01
        $appid =        'appid';//appid
        $body =        $details;// '金邦汇商城';//'【自己填写】'
        $mch_id =       '1486742092';//'你的商户号【自己填写】'
        $nonce_str =    $this->nonce_str();//随机字符串
        $notify_url =   'https://zys.jinbh.cn/admin/Api/Wx_Speech';//回调的url【自己填写】';
        $openid =       $request->param('openid');//'用户的openid【自己填写】';
        $out_trade_no = $this->order_number($openid);//商户订单号
        $spbill_create_ip = '123.206.45.131';//'服务器的ip【自己填写】';
        $total_fee =    $fee*100;//因为充值金额最小是1 而且单位为分 如果是充值1元所以这里需要*100
        $trade_type = 'JSAPI';//交易类型 默认
        //这里是按照顺序的 因为下面的签名是按照顺序 排序错误 肯定出错
        $post['appid'] = $appid;
        $post['body'] = $body;
        
        $post['mch_id'] = $mch_id;
      
        $post['nonce_str'] = $nonce_str;//随机字符串
      
        $post['notify_url'] = $notify_url;
      
        $post['openid'] = $openid;
      
        $post['out_trade_no'] = $out_trade_no;
      
        $post['spbill_create_ip'] = $spbill_create_ip;//终端的ip
      
        $post['total_fee'] = $total_fee;//总金额 最低为一块钱 必须是整数
     
        $post['trade_type'] = $trade_type;
        $sign = $this->sign($post);//签名
        $post_xml = '<xml>
           <appid>'.$appid.'</appid>
           <body>'.$body.'</body>
           <mch_id>'.$mch_id.'</mch_id>
           <nonce_str>'.$nonce_str.'</nonce_str>
           <notify_url>'.$notify_url.'</notify_url>
           <openid>'.$openid.'</openid>
           <out_trade_no>'.$out_trade_no.'</out_trade_no>
           <spbill_create_ip>'.$spbill_create_ip.'</spbill_create_ip>
           <total_fee>'.$total_fee.'</total_fee>
           <trade_type>'.$trade_type.'</trade_type>
           <sign>'.$sign.'</sign>
        </xml> ';
        //统一接口prepay_id
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $xml = $this->http_request($url,$post_xml);
        $array = $this->xml($xml);//全要大写
        if($array['RETURN_CODE'] == 'SUCCESS' && $array['RESULT_CODE'] == 'SUCCESS'){
            $time = time();
            $tmp='';//临时数组用于签名
            $tmp['appId'] = $appid;
            $tmp['nonceStr'] = $nonce_str;
            $tmp['package'] = 'prepay_id='.$array['PREPAY_ID'];
            $tmp['signType'] = 'MD5';
            $tmp['timeStamp'] = "$time";

            $data['state'] = 1;
            $data['timeStamp'] = "$time";//时间戳
            $data['nonceStr'] = $nonce_str;//随机字符串
            $data['signType'] = 'MD5';//签名算法,暂支持 MD5
            $data['package'] = 'prepay_id='.$array['PREPAY_ID'];//统一下单接口返回的 prepay_id 参数值,提交格式如:prepay_id=*
            $data['paySign'] = $this->sign($tmp);//签名,具体签名方案参见微信公众号支付帮助文档;
            $data['out_trade_no'] = $out_trade_no;

        }else{
            $data['state'] = 0;
            $data['text'] = "错误";
            $data['RETURN_CODE'] = $array['RETURN_CODE'];
            $data['RETURN_MSG'] = $array['RETURN_MSG'];
        }
      echo json_encode($data);
    }


//随机32位字符串
    private function nonce_str(){
        $result = '';
        $str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
        for ($i=0;$i<32;$i++){
            $result .= $str[rand(0,48)];
        }
        return $result;
    }


//生成订单号
    private function order_number($openid){
        //date('Ymd',time()).time().rand(10,99);//18        return md5($openid.time().rand(10,99));//32    }




//签名 $data要先排好顺序
    public function sign($data)
    {
        $stringA = '';
        foreach ($data as $key => $value) {
            if (!$value) continue;
            if ($stringA) $stringA .= '&' . $key . "=" . $value;
            else $stringA = $key . "=" . $value;
        }
        $wx_key = 'Zhangyusheng19810318015729366660';//申请支付后有给予一个商户账号和密码,登陆后自己设置key
        $stringSignTemp = $stringA . '&key=' . $wx_key;//申请支付后有给予一个商户账号和密码,登陆后自己设置key 
      return strtoupper(md5($stringSignTemp));
    }

//curl请求啊
        function http_request($url, $data = null, $headers = array())
        {
            $curl = curl_init();
            if (count($headers) >= 1) {
                curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
            }
            curl_setopt($curl, CURLOPT_URL, $url);

            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

            if (!empty($data)) {
                curl_setopt($curl, CURLOPT_POST, 1);
                curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
            }
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
            $output = curl_exec($curl);
            curl_close($curl);
            return $output;
        }

//获取xml
        private function xml($xml){
            $p = xml_parser_create();
            xml_parse_into_struct($p, $xml, $vals, $index);
            xml_parser_free($p);
            $data = "";
            foreach ($index as $key=>$value) {
                if($key == 'xml' || $key == 'XML') continue;
                $tag = $vals[$value[0]]['tag'];
                $value = $vals[$value[0]]['value'];
                $data[$tag] = $value;
            }
            return $data;
        }
//微信支付结束