• 微信 之jsapi实现支付


    一、微信公众号号后台支付配置

    附微信支付参考文档:https://pay.weixin.qq.com/wiki/doc/api/index.html

    二、微信支付类封装

    该类可以实现付款码支付、JSAPI支付、Native支付

    <?php
    
    /**
     * Created by PhpStorm.
     * User: Administrator
     * Date: 2019/2/16 0016
     * Time: 下午 4:04
     */
    class Wxpay
    {
        const TRADETYPE_JSAPI = 'JSAPI', TRADETYPE_NATIVE = 'NATIVE', TRADETYPE_APP = 'APP';
        const URL_UNIFIEDORDER = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        const URL_ORDERQUERY = "https://api.mch.weixin.qq.com/pay/orderquery";
        const URL_CLOSEORDER = 'https://api.mch.weixin.qq.com/pay/closeorder';
        const URL_REFUND = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
        const URL_REFUNDQUERY = 'https://api.mch.weixin.qq.com/pay/refundquery';
        const URL_DOWNLOADBILL = 'https://api.mch.weixin.qq.com/pay/downloadbill';
        const URL_REPORT = 'https://api.mch.weixin.qq.com/payitil/report';
        const URL_SHORTURL = 'https://api.mch.weixin.qq.com/tools/shorturl';
        const URL_MICROPAY = 'https://api.mch.weixin.qq.com/pay/micropay';
        /**
         * 错误信息
         */
        public $error = null;
        /**
         * 错误信息XML
         */
        public $errorXML = null;
        /**
         * 微信支付配置数组
         * appid        公众账号appid
         * mch_id       商户号
         * apikey       加密key
         * appsecret    公众号appsecret
         * sslcertPath  证书路径(apiclient_cert.pem)
         * sslkeyPath   密钥路径(apiclient_key.pem)
         */
        private $_config;
    
        /**
         * @param $config 微信支付配置数组
         */
        public function __construct($config)
        {
            $this->_config = $config;
        }
    
        /**
         * JSAPI获取prepay_id
         * @param $body
         * @param $out_trade_no
         * @param $total_fee
         * @param $notify_url
         * @param $openid
         * @return null
         */
        public function getPrepayId($body, $out_trade_no, $total_fee, $notify_url, $openid)
        {
            $data = array();
            $data["nonce_str"] = $this->get_nonce_string();
            $data["body"] = $body;
            $data["out_trade_no"] = $out_trade_no;
            $data["total_fee"] = $total_fee;
            $data["spbill_create_ip"] = $_SERVER["REMOTE_ADDR"];
            $data["notify_url"] = $notify_url;
            $data["trade_type"] = self::TRADETYPE_JSAPI;
            $data["openid"] = $openid;
            $result = $this->unifiedOrder($data);
            if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") {
                return $result["prepay_id"];
            } else {
                $this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"];
                $this->errorXML = $this->array2xml($result);
                return null;
            }
        }
    
        private function get_nonce_string()
        {
            return substr(str_shuffle("abcdefghijklmnopqrstuvwxyz0123456789"), 0, 32);
        }
    
        /**
         * 统一下单接口
         */
        public function unifiedOrder($params)
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["device_info"] = (isset($params['device_info']) && trim($params['device_info']) != '') ? $params['device_info'] : null;
            $data["nonce_str"] = $this->get_nonce_string();
            $data["body"] = $params['body'];
            $data["detail"] = isset($params['detail']) ? $params['detail'] : null;//optional
            $data["attach"] = isset($params['attach']) ? $params['attach'] : null;//optional
            $data["out_trade_no"] = isset($params['out_trade_no']) ? $params['out_trade_no'] : null;
            $data["fee_type"] = isset($params['fee_type']) ? $params['fee_type'] : 'CNY';
            $data["total_fee"] = $params['total_fee'];
            $data["spbill_create_ip"] = $params['spbill_create_ip'];
            $data["time_start"] = isset($params['time_start']) ? $params['time_start'] : null;//optional
            $data["time_expire"] = isset($params['time_expire']) ? $params['time_expire'] : null;//optional
            $data["goods_tag"] = isset($params['goods_tag']) ? $params['goods_tag'] : null;
            $data["notify_url"] = $params['notify_url'];
            $data["trade_type"] = $params['trade_type'];
            $data["product_id"] = isset($params['product_id']) ? $params['product_id'] : null;//required when trade_type = NATIVE
            $data["openid"] = isset($params['openid']) ? $params['openid'] : null;//required when trade_type = JSAPI
            $result = $this->post(self::URL_UNIFIEDORDER, $data);
            return $result;
        }
    
        private function post($url, $data, $cert = false)
        {
            $data["sign"] = $this->sign($data);
            $xml = $this->array2xml($data);
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_URL, $url);
            if ($cert == true) {
                //使用证书:cert 与 key 分别属于两个.pem文件
                curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
                curl_setopt($ch, CURLOPT_SSLCERT, $this->_config['sslcertPath']);
                curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
                curl_setopt($ch, CURLOPT_SSLKEY, $this->_config['sslkeyPath']);
            }
            $content = curl_exec($ch);
            $array = $this->xml2array($content);
            return $array;
        }
    
        /**
         * 数据签名
         * @param $data
         * @return string
         */
        private function sign($data)
        {
            ksort($data);
            $string1 = "";
            foreach ($data as $k => $v) {
                if ($v && trim($v) != '') {
                    $string1 .= "$k=$v&";
                }
            }
            $stringSignTemp = $string1 . "key=" . $this->_config["apikey"];
            $sign = strtoupper(md5($stringSignTemp));
            return $sign;
        }
    
        private function array2xml($array)
        {
            $xml = "<xml>" . PHP_EOL;
            foreach ($array as $k => $v) {
                if ($v && trim($v) != '')
                    $xml .= "<$k><![CDATA[$v]]></$k>" . PHP_EOL;
            }
            $xml .= "</xml>";
            return $xml;
        }
    
        private function xml2array($xml)
        {
            $array = array();
            $tmp = null;
            try {
                $tmp = (array)simplexml_load_string($xml);
            } catch (Exception $e) {
            }
            if ($tmp && is_array($tmp)) {
                foreach ($tmp as $k => $v) {
                    $array[$k] = (string)$v;
                }
            }
            return $array;
        }
    
        /**
         * 扫码支付(模式二)获取支付二维码
         * @param $body
         * @param $out_trade_no
         * @param $total_fee
         * @param $notify_url
         * @param $product_id
         * @return null
         */
        public function getCodeUrl($body, $out_trade_no, $total_fee, $notify_url, $product_id)
        {
            $data = array();
            $data["nonce_str"] = $this->get_nonce_string();
            $data["body"] = $body;
            $data["out_trade_no"] = $out_trade_no;
            $data["total_fee"] = $total_fee;
            $data["spbill_create_ip"] = $_SERVER["SERVER_ADDR"];
            $data["notify_url"] = $notify_url;
            $data["trade_type"] = self::TRADETYPE_NATIVE;
            $data["product_id"] = $product_id;
            $result = $this->unifiedOrder($data);
            if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") {
                return $result["code_url"];
            } else {
                $this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"];
                return null;
            }
        }
    
        /**
         * 查询订单
         * @param $transaction_id
         * @param $out_trade_no
         * @return array
         */
        public function orderQuery($transaction_id, $out_trade_no)
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["transaction_id"] = $transaction_id;
            $data["out_trade_no"] = $out_trade_no;
            $data["nonce_str"] = $this->get_nonce_string();
            $result = $this->post(self::URL_ORDERQUERY, $data);
            return $result;
        }
    
        /**
         * 关闭订单
         * @param $out_trade_no
         * @return array
         */
        public function closeOrder($out_trade_no)
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["out_trade_no"] = $out_trade_no;
            $data["nonce_str"] = $this->get_nonce_string();
            $result = $this->post(self::URL_CLOSEORDER, $data);
            return $result;
        }
    
        /**
         * 申请退款 - 使用商户订单号
         * @param $out_trade_no 商户订单号
         * @param $out_refund_no 退款单号
         * @param $total_fee 总金额(单位:分)
         * @param $refund_fee 退款金额(单位:分)
         * @param $op_user_id 操作员账号
         * @return array
         */
        public function refund($out_trade_no, $out_refund_no, $total_fee, $refund_fee, $op_user_id)
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["nonce_str"] = $this->get_nonce_string();
            $data["out_trade_no"] = $out_trade_no;
            $data["out_refund_no"] = $out_refund_no;
            $data["total_fee"] = $total_fee;
            $data["refund_fee"] = $refund_fee;
            $data["op_user_id"] = $op_user_id;
            $result = $this->post(self::URL_REFUND, $data, true);
            return $result;
        }
    
        /**
         * 申请退款 - 使用微信订单号
         * @param $out_trade_no 商户订单号
         * @param $out_refund_no 退款单号
         * @param $total_fee 总金额(单位:分)
         * @param $refund_fee 退款金额(单位:分)
         * @param $op_user_id 操作员账号
         * @return array
         */
        public function refundByTransId($transaction_id, $out_refund_no, $total_fee, $refund_fee, $op_user_id)
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["nonce_str"] = $this->get_nonce_string();
            $data["transaction_id"] = $transaction_id;
            $data["out_refund_no"] = $out_refund_no;
            $data["total_fee"] = $total_fee;
            $data["refund_fee"] = $refund_fee;
            $data["op_user_id"] = $op_user_id;
            $result = $this->post(self::URL_REFUND, $data, true);
            return $result;
        }
    
        /**
         * 下载对账单
         * @param $bill_date 下载对账单的日期,格式:20140603
         * @param $bill_type 类型
         * @return array
         */
        public function downloadBill($bill_date, $bill_type = 'ALL')
        {
            $data = array();
            $data["appid"] = $this->_config["appid"];
            $data["mch_id"] = $this->_config["mch_id"];
            $data["bill_date"] = $bill_date;
            $data["bill_type"] = $bill_type;
            $data["nonce_str"] = $this->get_nonce_string();
            $result = $this->post(self::URL_DOWNLOADBILL, $data);
            return $result;
        }
    
        /**
         * 获取js支付使用的第二个参数
         */
        public function get_package($prepay_id)
        {
            $data = array();
            $data["appId"] = $this->_config["appid"];
            $data["timeStamp"] = time();
            $data["nonceStr"] = $this->get_nonce_string();
            $data["package"] = "prepay_id=$prepay_id";
            $data["signType"] = "MD5";
            $data["paySign"] = $this->sign($data);
            return $data;
        }
    
        /**
         * 获取发送到通知地址的数据(在通知地址内使用)
         * @return 结果数组,如果不是微信服务器发送的数据返回null
         *          appid
         *          bank_type
         *          cash_fee
         *          fee_type
         *          is_subscribe
         *          mch_id
         *          nonce_str
         *          openid
         *          out_trade_no    商户订单号
         *          result_code
         *          return_code
         *          sign
         *          time_end
         *          total_fee       总金额
         *          trade_type
         *          transaction_id  微信支付订单号
         */
        public function get_back_data()
        {
            $xml = file_get_contents("php://input");
            $data = $this->xml2array($xml);
            if ($this->validate($data)) {
                return $data;
            } else {
                return null;
            }
        }
    
        /**
         * 验证数据签名
         * @param $data 数据数组
         * @return 数据校验结果
         */
        public function validate($data)
        {
            if (!isset($data["sign"])) {
                return false;
            }
            $sign = $data["sign"];
            unset($data["sign"]);
            return $this->sign($data) == $sign;
        }
    
        /**
         * 响应微信支付后台通知
         * @param $return_code 返回状态码 SUCCESS/FAIL
         * @param $return_msg  返回信息
         */
        public function response_back($return_code = "SUCCESS", $return_msg = null)
        {
            $data = array();
            $data["return_code"] = $return_code;
            if ($return_msg) {
                $data["return_msg"] = $return_msg;
            }
            $xml = $this->array2xml($data);
            print $xml;
        }
    }

    先调用getPrepayId方法,后再调用get_package方法,返回的参数传给前台。

    三、前台js代码

    function onBridgeReady(){
       WeixinJSBridge.invoke(
          'getBrandWCPayRequest', {
             "appId":"wx2421b1c4370ec43b",     //公众号名称,由商户传入     
             "timeStamp":"1395712654",         //时间戳,自1970年以来的秒数     
             "nonceStr":"e61463f8efa94090b1f366cccfbbb444", //随机串     
             "package":"prepay_id=u802345jgfjsdfgsdg888",     
             "signType":"MD5",         //微信签名方式:     
             "paySign":"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名 
          },
          function(res){
          if(res.err_msg == "get_brand_wcpay_request:ok" ){
          // 使用以上方式判断前端返回,微信团队郑重提示:
                //res.err_msg将在用户支付成功后返回ok,但并不保证它绝对可靠。
          } 
       }); 
    }
    if (typeof WeixinJSBridge == "undefined"){
       if( document.addEventListener ){
           document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
       }else if (document.attachEvent){
           document.attachEvent('WeixinJSBridgeReady', onBridgeReady); 
           document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
       }
    }else{
       onBridgeReady();
    }
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  • 原文地址:https://www.cnblogs.com/yang-2018/p/10388214.html
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