原创:微信小程序调用【统一下单】、【支付】、【支付回调】api并处理请求

1、服务器端使用TP3.2处理(随便写在一个Controller里面)

/* 小程序报名,生成订单 */
    public function make_order(){
        if(IS_POST){
            $data['openid'] = I('POST.openid');
            $data_total = I('POST.data_total');
            $data['crsNo'] = 'W'.date('YmdHis',time()).'-'.randomkeys(2);
            $insertId = M('home_order','xxf_witkey_')->add($data);
            if($insertId){
                $this->insertID = $insertId;
                $this->data_total = $data_total*100;    //订单总金额,单位分
                /* 调用微信【统一下单】 */
                $this->pay($data_total*100,$data['openid'],$data['crsNo']);
            }else{
                echo $insertId;
            }
            //echo json_encode($re);
        }
    }
    
/* 首先在服务器端调用微信【统一下单】接口,返回prepay_id和sign签名等信息给前端,前端调用微信支付接口 */
    private function Pay($total_fee,$openid,$order_id){
        if(empty($total_fee)){
            echo json_encode(array('state'=>0,'Msg'=>'金额有误'));exit;
        }
        if(empty($openid)){
            echo json_encode(array('state'=>0,'Msg'=>'登录失效,请重新登录(openid参数有误)'));exit;
        }
        if(empty($order_id)){
            echo json_encode(array('state'=>0,'Msg'=>'自定义订单有误'));exit;
        }
        $appid =        '小程序appid';//如果是公众号 就是公众号的appid;小程序就是小程序的appid
        $body =         '自己填';
        $mch_id =       '商户账号';
        $KEY = '你申请微信支付的key';
        $nonce_str =    randomkeys(32);//随机字符串
        $notify_url =   'https://m.******.com/index.php/Home/Xiaoxxf/xiao_notify_url';  //支付完成回调地址url,不能带参数
        $out_trade_no = $order_id;//商户订单号
        $spbill_create_ip = $_SERVER['SERVER_ADDR'];
        $trade_type = 'JSAPI';//交易类型 默认JSAPI
    
        //这里是按照顺序的 因为下面的签名是按照(字典序)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;//服务器终端的ip
        $post['total_fee'] = intval($total_fee);        //总金额 最低为一分钱 必须是整数
        $post['trade_type'] = $trade_type;
        $sign = $this->MakeSign($post,$KEY);              //签名
        $this->sign = $sign;
    
        $post_xml = '<xml>
               <appid>'.$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> ';
    
        //统一下单接口prepay_id
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $xml = $this->http_request($url,$post_xml);     //POST方式请求http
        $array = $this->xml2array($xml);               //将【统一下单】api返回xml数据转换成数组,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'] = $this->MakeSign($tmp,$KEY);       //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);
    }
    
    /**
     * 生成签名, $KEY就是支付key
     * @return 签名
     */
    public function MakeSign( $params,$KEY){
        //签名步骤一:按字典序排序数组参数
        ksort($params);
        $string = $this->ToUrlParams($params);  //参数进行拼接key=value&k=v
        //签名步骤二:在string后加入KEY
        $string = $string . "&key=".$KEY;
        //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;
    }
    /**
     * 将参数拼接为url: key=value&key=value
     * @param $params
     * @return string
     */
    public function ToUrlParams( $params ){
        $string = '';
        if( !empty($params) ){
            $array = array();
            foreach( $params as $key => $value ){
                $array[] = $key.'='.$value;
            }
            $string = implode("&",$array);
        }
        return $string;
    }
    /**
     * 调用接口, $data是数组参数
     * @return 签名
     */
    public function http_request($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 $output;
    }
    //获取xml里面数据,转换成array
    private function xml2array($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;
    }
    

/**
     * 将xml转为array
     * @param string $xml
     * return array
     */
    public function xml_to_array($xml){
        if(!$xml){
            return false;
        }
        //将XML转为array
        //禁止引用外部xml实体
        libxml_disable_entity_loader(true);
        $data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $data;
    }

//还有就是,微信要求支付后处理微信发送的回调内容,就是告诉商户,订单交易成功了,你要发送‘我知道了’给微信。

//还有一点就是:这里就是回调url,你预支付填写的notify_url地址。废话不多说,看下面

 

    /* 微信支付完成,回调地址url方法  xiao_notify_url() */
    public function xiao_notify_url(){
        $post = post_data();    //接受POST数据XML个数
/*

function post_data(){
$receipt = $_REQUEST;
if($receipt==null){
$receipt = file_get_contents("php://input");
if($receipt == null){
$receipt = $GLOBALS['HTTP_RAW_POST_DATA'];
}
}
return $receipt;
}

*/
$post_data = $this->xml_to_array($post); //微信支付成功,返回回调地址url的数据:XML转数组Array $postSign = $post_data['sign']; unset($post_data['sign']); /* 微信官方提醒: * 商户系统对于支付结果通知的内容一定要做【签名验证】, * 并校验返回的【订单金额是否与商户侧的订单金额】一致, * 防止数据泄漏导致出现“假通知”,造成资金损失。 */ ksort($post_data);// 对数据进行排序 $str = $this->ToUrlParams($post_data);//对数组数据拼接成key=value字符串 $user_sign = strtoupper(md5($post_data)); //再次生成签名,与$postSign比较 $where['crsNo'] = $post_data['out_trade_no']; $order_status = M('home_order','xxf_witkey_')->where($where)->find(); if($post_data['return_code']=='SUCCESS'&&$postSign){ /* * 首先判断,订单是否已经更新为ok,因为微信会总共发送8次回调确认 * 其次,订单已经为ok的,直接返回SUCCESS * 最后,订单没有为ok的,更新状态为ok,返回SUCCESS */ if($order_status['order_status']=='ok'){ $this->return_success(); }else{ $updata['order_status'] = 'ok'; if(M('home_order','xxf_witkey_')->where($where)->save($updata)){ $this->return_success(); } } }else{ echo '微信支付失败'; } } /* * 给微信发送确认订单金额和签名正确,SUCCESS信息 -xzz0521 */ private function return_success(){ $return['return_code'] = 'SUCCESS'; $return['return_msg'] = 'OK'; $xml_post = '<xml> <return_code>'.$return['return_code'].'</return_code> <return_msg>'.$return['return_msg'].'</return_msg> </xml>'; echo $xml_post;exit; }

2、小程序端发起下单和支付请求:

/**
   * 自定义方法,校验form数据
   */
  submitForm: function (e) {    //这里是小程序wxml提交form
    var that = this;
//#code ,注意这里的form数据你要校验哦。 wx.request({ url:
'https://m.******.com/index.php/Home/Xiaoxxf/make_order', header: { "Content-Type": "application/x-www-form-urlencoded" }, method: "POST", data: { openid: wx.getStorageSync('openid'), data_name: e.detail.value.data_name, data_phone: e.detail.value.data_phone, data_IDcard: e.detail.value.data_IDcard, data_num: e.detail.value.data_num, data_addr: e.detail.value.data_addr, data_remark: e.detail.value.data_remark, data_total: e.detail.value.data_num * that.data.unitPrice,a_id:that.data.a_id}, success: function (res) { if (res.data.state==1) { // --------- 订单生成成功,发起支付请求 ------------------ wx.requestPayment({ timeStamp: res.data.timeStamp, nonceStr: res.data.nonceStr, //字符串随机数 package: res.data.package, signType: res.data.signType, paySign: res.data.paySign, 'success': function (res) { console.log(res.errMsg); //requestPayment:ok==>调用支付成功 wx.showToast({ title: '报名成功',//这里打印出报名成功 icon: 'success', duration: 1000 }) }, 'fail': function (res) { console.log(res.errMsg); }, 'complete': function (res) { console.log(res.errMsg); } }) } else if (res.data.state == 0){ wx.showToast({ title: res.data.Msg, icon: 'fail', duration: 1000 }) }else{ wx.showToast({ title: '系统繁忙,请稍后重试~', icon: 'fail', duration: 1000 }) } } }) }

 

posted @ 2017-06-21 18:24  PHP急先锋  阅读(38321)  评论(14编辑  收藏  举报