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  • 基于H5的微信支付开发代码讲解(二)

    发布:HTML5培训  来源:html5教程  时间: 2016年01月29日

  • 本次开发环境用的是php5.6 + MySQL + Redis + Linux + Apache,所选用的框架的CI框架(这些环境不一定需要和我的一致,框架也可以自己选择,反正自己稍微修改下代码就能移植过去了)...

  • 承接上文:基于H5的微信支付开发思路详解(一)

    三、基于H5的微信支付开发代码讲解

    本次开发环境用的是php5.6 + MySQL + Redis + Linux + Apache,所选用的框架的CI框架(这些环境不一定需要和我的一致,框架也可以自己选择,反正自己稍微修改下代码就能移植过去了)。

    微信支付接口的开发代码我已经提前写好了,在这里我对其进行分析讲解,方便大家能轻松理解,当然,假如你有一定的基础,直接看代码就能理清所有流程了,并且我的代码基本上都写上了注释(对于新手来说,这一点比微信文档所提供的代码好一点)。

    1、构造一个链接展示给用户

    这里我们提前需要知道一个点,那就是请求统一下单接口需要微信用户的openid而获取openid需要先获取code所以我们需要构造一个获取code的URL:

        Wxpay.php文件: 
        <?php 
        defined('BASEPATH') OR exit('No direct script access allowed'); 
         
        class Wxpay extends MY_Controller { 
            public function __construct() { 
                parent::__construct(); 
                $this->load->model('wxpay_model'); 
                //$this->load->model('wxpay'); 
                 
            } 
          
            public function index() { 
                //微信支付 
                $this->smarty['wxPayUrl'] = $this->wxpay_model->retWxPayUrl(); 
                $this->displayView('wxpay/index.tpl'); 
            } 
        } 

    在这先看看model里所写的几个类:model里有几个类:微信支付类、统一下单接口类、响应型接口基类、请求型接口基类、所有接口基类、配置类。为何要分那么多类而不在一个类里实现所有的方法的,因为,这样看起来代码逻辑清晰,哪个类该干嘛就干嘛。

    这里我直接附上model的代码了,里面基本上每一个类每一个方法甚至每一行代码都会有解释的了,这里我就不对其展开一句句分析了:

        <?php 
        defined('BASEPATH') OR exit('No direct script access allowed'); 
         
        class Wxpay_model extends CI_Model { 
            public function __construct() { 
                parent::__construct(); 
            } 
             
            /** 
             * 返回可以获得微信code的URL (用以获取openid) 
             * @return [type] [description] 
             */ 
            public function retWxPayUrl() { 
                $jsApi = new JsApi_handle(); 
                return $jsApi->createOauthUrlForCode(); 
            } 
          
            /** 
             * 微信jsapi点击支付 
             * @param  [type] $data [description] 
             * @return [type]       [description] 
             */ 
            public function wxPayJsApi($data) { 
                $jsApi = new JsApi_handle(); 
                //统一下单接口所需数据 
                $payData = $this->returnData($data); 
                //获取code码,用以获取openid 
                $code = $_GET['code']; 
                $jsApi->setCode($code); 
                //通过code获取openid 
                $openid = $jsApi->getOpenId(); 
                 
                $unifiedOrderResult = null; 
                if ($openid != null) { 
                    //取得统一下单接口返回的数据 
                    $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); 
                    //获取订单接口状态 
                    $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); 
                    if ($returnMessage['resultCode']) { 
                        $jsApi->setPrepayId($retuenMessage['resultField']); 
                        //取得wxjsapi接口所需要的数据 
                        $returnMessage['resultData'] = $jsApi->getParams(); 
                    }  
         
                    return $returnMessage; 
                } 
            } 
         
            /** 
             * 统一下单接口所需要的数据 
             * @param  [type] $data [description] 
             * @return [type]       [description] 
             */ 
            public function returnData($data) { 
                $payData['sn'] = $data['sn']; 
                $payData['body'] = $data['goods_name']; 
                $payData['out_trade_no'] = $data['order_no']; 
                $payData['total_fee'] = $data['fee']; 
                $payData['attach'] = $data['attach']; 
         
                return $payData; 
            } 
         
            /** 
             * 返回统一下单接口结果 (参考https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1) 
             * @param  [type] $payData    [description] 
             * @param  [type] $trade_type [description] 
             * @param  [type] $openid     [description] 
             * @return [type]             [description] 
             */ 
            public function getResult($payData, $trade_type, $openid = null) { 
                $unifiedOrder = new UnifiedOrder_handle(); 
         
                if ($opneid != null) { 
                    $unifiedOrder->setParam('openid', $openid); 
                } 
                $unifiedOrder->setParam('body', $payData['body']);  //商品描述 
                $unifiedOrder->setParam('out_trade_no', $payData['out_trade_no']); //商户订单号 
                $unifiedOrder->setParam('total_fee', $payData['total_fee']);    //总金额 
                $unifiedOrder->setParam('attach', $payData['attach']);  //附加数据 
                $unifiedOrder->setParam('notify_url', base_url('/Wxpay/pay_callback'));//通知地址 
                $unifiedOrder->setParam('trade_type', $trade_type); //交易类型 
         
                //非必填参数,商户可根据实际情况选填 
                //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商户号 
                //$unifiedOrder->setParam("device_info","XXXX");//设备号 
                //$unifiedOrder->setParam("time_start","XXXX");//交易起始时间 
                //$unifiedOrder->setParam("time_expire","XXXX");//交易结束时间 
                //$unifiedOrder->setParam("goods_tag","XXXX");//商品标记 
                //$unifiedOrder->setParam("product_id","XXXX");//商品ID 
                 
                return $unifiedOrder->getResult(); 
            } 
         
            /** 
             * 返回微信订单状态 
             */ 
            public function returnMessage($unifiedOrderResult,$field){ 
                $arrMessage=array("resultCode"=>0,"resultType"=>"获取错误","resultMsg"=>"该字段为空"); 
                if($unifiedOrderResult==null){ 
                    $arrMessage["resultType"]="未获取权限"; 
                    $arrMessage["resultMsg"]="请重新打开页面"; 
                }elseif ($unifiedOrderResult["return_code"] == "FAIL") 
                { 
                    $arrMessage["resultType"]="网络错误"; 
                    $arrMessage["resultMsg"]=$unifiedOrderResult['return_msg']; 
                } 
                elseif($unifiedOrderResult["result_code"] == "FAIL") 
                { 
                    $arrMessage["resultType"]="订单错误"; 
                    $arrMessage["resultMsg"]=$unifiedOrderResult['err_code_des']; 
                } 
                elseif($unifiedOrderResult[$field] != NULL) 
                { 
                    $arrMessage["resultCode"]=1; 
                    $arrMessage["resultType"]="生成订单"; 
                    $arrMessage["resultMsg"]="OK"; 
                    $arrMessage["resultField"] = $unifiedOrderResult[$field]; 
                } 
                return $arrMessage; 
            } 
         
            /** 
             * 微信回调接口返回  验证签名并回应微信 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function wxPayNotify($xml) { 
                $notify = new Wxpay_server(); 
                $notify->saveData($xml); 
                //验证签名,并回复微信 
                //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 
                //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 
                if ($notify->checkSign() == false) { 
                    $notify->setReturnParameter("return_code","FAIL");//返回状态码 
                    $notify->setReturnParameter("return_msg","签名失败");//返回信息 
                } else { 
                    $notify->checkSign=TRUE; 
                    $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 
                } 
         
                return $notify; 
            } 
        } 
         
        /** 
        * JSAPI支付——H5网页端调起支付接口 
        */ 
        class JsApi_handle extends JsApi_common { 
            public $code;//code码,用以获取openid 
            public $openid;//用户的openid 
            public $parameters;//jsapi参数,格式为json 
            public $prepay_id;//使用统一支付接口得到的预支付id 
            public $curl_timeout;//curl超时时间 
         
            function __construct() 
            { 
                //设置curl超时时间 
                $this->curl_timeout = WxPayConf::CURL_TIMEOUT; 
            } 
         
            /** 
             * 生成获取code的URL 
             * @return [type] [description] 
             */ 
            public function createOauthUrlForCode() { 
                //重定向URL 
                $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; 
                $urlParams['appid'] = WxPayConf::APPID; 
                $urlParams['redirect_uri'] = $redirectUrl; 
                $urlParams['response_type'] = 'code'; 
                $urlParams['scope'] = 'snsapi_base'; 
                $urlParams['state'] = "STATE"."#wechat_redirect"; 
                //拼接字符串 
                $queryString = $this->ToUrlParams($urlParams, false); 
                return "https://open.weixin.qq.com/connect/oauth2/authorize?".$queryString; 
            } 
         
            /** 
             * 设置code 
             * @param [type] $code [description] 
             */ 
            public function setCode($code) { 
                $this->code = $code; 
            } 
         
            /** 
             *  作用:设置prepay_id 
             */ 
            public function setPrepayId($prepayId) 
            { 
                $this->prepay_id = $prepayId; 
            } 
         
            /** 
             *  作用:获取jsapi的参数 
             */ 
            public function getParams() 
            { 
                $jsApiObj["appId"] = WxPayConf::APPID; 
                $timeStamp = time(); 
                $jsApiObj["timeStamp"] = "$timeStamp"; 
                $jsApiObj["nonceStr"] = $this->createNoncestr(); 
                $jsApiObj["package"] = "prepay_id=$this->prepay_id"; 
                $jsApiObj["signType"] = "MD5"; 
                $jsApiObj["paySign"] = $this->getSign($jsApiObj); 
                $this->parameters = json_encode($jsApiObj); 
         
                return $this->parameters; 
            } 
         
            /** 
             * 通过curl 向微信提交code 用以获取openid 
             * @return [type] [description] 
             */ 
            public function getOpenId() { 
                //创建openid 的链接 
                $url = $this->createOauthUrlForOpenid(); 
                //初始化 
                $ch = curl_init(); 
                curl_setopt($ch, CURL_TIMEOUT, $this->curl_timeout); 
                curl_setopt($ch, CURL_URL, $url); 
                curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); 
                curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); 
                curl_setopt($ch, CURL_HEADER, FALSE); 
                curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); 
                //执行curl 
                $res = curl_exec($ch); 
                curl_close($ch); 
                //取出openid 
                $data = json_decode($res); 
                if (isset($data['openid'])) { 
                    $this->openid = $data['openid']; 
                } else { 
                    return null; 
                } 
         
                return $this->openid; 
         
            } 
         
            /** 
             * 生成可以获取openid 的URL 
             * @return [type] [description] 
             */ 
            public function createOauthUrlForOpenid() { 
                $urlParams['appid'] = WxPayConf::APPID; 
                $urlParams['secret'] = WxPayConf::APPSECRET; 
                $urlParams['code'] = $this->code; 
                $urlParams['grant_type'] = "authorization_code"; 
                $queryString = $this->ToUrlParams($urlParams, false); 
                return "https://api.weixin.qq.com/sns/oauth2/access_token?".$queryString; 
            } 
        } 
         
        /** 
         * 统一下单接口类 
         */ 
        class UnifiedOrder_handle extends Wxpay_client_handle { 
            public function __construct() { 
                //设置接口链接 
                $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; 
                //设置curl超时时间 
                $this->curl_timeout = WxPayConf::CURL_TIMEOUT; 
            } 
         
        } 
         
        /** 
         * 响应型接口基类 
         */ 
        class Wxpay_server_handle extends JsApi_common{ 
            public $data; //接收到的数据,类型为关联数组 
            public $returnParams;   //返回参数,类型为关联数组 
         
            /** 
             * 将微信请求的xml转换成关联数组 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function saveData($xml) { 
                $this->data = $this->xmlToArray($xml);  
            } 
         
         
            /** 
             * 验证签名 
             * @return [type] [description] 
             */ 
            public function checkSign() { 
                $tmpData = $this->data; 
                unset($temData['sign']); 
                $sign = $this->getSign($tmpData); 
                if ($this->data['sign'] == $sign) { 
                    return true; 
                } 
                return false; 
            } 
         
         
            /** 
             * 设置返回微信的xml数据 
             */ 
            function setReturnParameter($parameter, $parameterValue) 
            { 
                $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); 
            } 
         
            /** 
             * 将xml数据返回微信 
             */ 
            function returnXml() 
            { 
                $returnXml = $this->createXml(); 
                return $returnXml; 
            } 
         
        } 
         
        /** 
         * 请求型接口的基类 
         */ 
        class Wxpay_client_handle extends JsApi_common{ 
            public $params; //请求参数,类型为关联数组 
            public $response; //微信返回的响应 
            public $result; //返回参数,类型类关联数组 
            public $url; //接口链接 
            public $curl_timeout; //curl超时时间 
         
            /** 
             * 设置请求参数 
             * @param [type] $param      [description] 
             * @param [type] $paramValue [description] 
             */ 
            public function setParam($param, $paramValue) { 
                $this->params[$this->tirmString($param)] = $this->trimString($paramValue); 
            } 
         
            /** 
             * 获取结果,默认不使用证书 
             * @return [type] [description] 
             */ 
            public function getResult() { 
                $this->postxml();  
                $this->result = $this->xmlToArray($this->response); 
         
                return $this->result; 
            } 
         
            /** 
             * post请求xml 
             * @return [type] [description] 
             */ 
            public function postxml() { 
                $xml = $this->createXml(); 
                $this->response = $this->postXmlCurl($xml, $this->curl, $this->curl_timeout); 
         
                return $this->response; 
            } 
         
            public function createXml() { 
                $this->params['appid'] = WxPayConf::APPID; //公众号ID 
                $this->params['mch_id'] = WxPayConf::MCHID; //商户号 
                $this->params['nonce_str'] = $this->createNoncestr();   //随机字符串 
                $this->params['sign'] = $this->getSign($this->params);  //签名 
                 
                return $this->arrayToXml($this->params);  
            } 
         
             
         
        } 
         
        /** 
         * 所有接口的基类 
         */ 
        class JsApi_common { 
            function __construct() { 
         
            } 
         
            public function trimString($value) { 
                $ret = null; 
                if (null != $value) { 
                    $ret = trim($value); 
                    if (strlen($ret) == 0) { 
                        $ret = null; 
                    } 
                }  
                return $ret; 
            } 
         
            /** 
             * 产生随机字符串,不长于32位 
             * @param  integer $length [description] 
             * @return [type]          [description] 
             */ 
            public function createNoncestr($length = 32) { 
                $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; 
                $str = ''; 
                for ($i = 0; $i < $length; $i++) { 
                    $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); 
                } 
         
                return $str; 
            } 
         
            /** 
             * 格式化参数 拼接字符串,签名过程需要使用 
             * @param [type] $urlParams     [description] 
             * @param [type] $needUrlencode [description] 
             */ 
            public function ToUrlParams($urlParams, $needUrlencode) { 
                $buff = ""; 
                ksort($urlParams); 
         
                foreach ($urlParams as $k => $v) { 
                    if($needUrlencode) $v = urlencode($v); 
                    $buff .= $k .'='. $v .'&'; 
                } 
         
                $reqString = ''; 
                if (strlen($buff) > 0) { 
                    $reqString = substr($buff, 0, strlen($buff) - 1); 
                } 
         
                return $reqString; 
            } 
         
            /** 
             * 生成签名 
             * @param  [type] $params [description] 
             * @return [type]         [description] 
             */ 
            public function getSign($obj) { 
                foreach ($obj as $k => $v) { 
                    $params[$k] = $v; 
                } 
                //签名步骤一:按字典序排序参数 
                ksort($params); 
                $str = $this->ToUrlParams($params, false);   
                //签名步骤二:在$str后加入key 
                $str = $str."$key=".WxPayConf::KEY; 
                //签名步骤三:md5加密 
                $str = md5($str); 
                //签名步骤四:所有字符转为大写 
                $result = strtoupper($str); 
         
                return $result; 
            } 
         
            /** 
             * array转xml 
             * @param  [type] $arr [description] 
             * @return [type]      [description] 
             */ 
            public function arrayToXml($arr) { 
                $xml = "<xml>"; 
                foreach ($arr as $k => $v) { 
                    if (is_numeric($val)) { 
                        $xml .= "<".$key.">".$key."</".$key.">"; 
                    } else { 
                        $xml .= "<".$key."><![CDATA[".$val."]]></".$key.">"; 
                    } 
                } 
                $xml .= "</xml>"; 
                return $xml; 
            } 
         
            /** 
             * 将xml转为array 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function xmlToArray($xml) { 
                $arr = json_decode(json_encode(simplexml_load_string($xml, 'SinpleXMLElement', LIBXML_NOCDATA)), true); 
         
                return $arr; 
            } 
         
            /** 
             * 以post方式提交xml到对应的接口 
             * @param  [type]  $xml    [description] 
             * @param  [type]  $url    [description] 
             * @param  integer $second [description] 
             * @return [type]          [description] 
             */ 
            public function postXmlCurl($xml, $url, $second = 30) { 
                //初始化curl 
                $ch = curl_init(); 
                //设置超时 
                curl_setopt($ch, CURL_TIMEOUT, $second); 
                curl_setopt($ch, CURL_URL, $url); 
                //这里设置代理,如果有的话 
                //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8'); 
                //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); 
                curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); 
                curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); 
                //设置header 
                curl_setopt($ch, CURL_HEADER, FALSE); 
                //要求结果为字符串且输出到屏幕上 
                curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); 
                //以post方式提交 
                curl_setopt($ch, CURL_POST, TRUE); 
                curl_setopt($ch, CURL_POSTFIELDS, $xml); 
                //执行curl 
                $res = curl_exec($ch); 
         
                if ($res) { 
                    curl_close($ch); 
                    return $res; 
                } else { 
                    $error = curl_errno($ch); 
                    echo "curl出错,错误码:$error"."<br>"; 
                    echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>"; 
                    curl_close($ch); 
                    return false; 
                } 
            } 
        } 
         
        /** 
         * 配置类 
         */ 
        class WxPayConf { 
            //微信公众号身份的唯一标识。 
            const APPID = 'wx654a22c6423213b7'; 
            //受理商ID,身份标识 
            const MCHID = '10043241'; 
            const MCHNAME = 'KellyCen的博客'; 
             
            //商户支付密钥Key。 
            const KEY = '0000000000000000000000000000000'; 
            //JSAPI接口中获取openid 
            const APPSECRET = '000000000000000000000000000'; 
         
            //证书路径,注意应该填写绝对路径 
            const SSLCERT_PATH = '/home/WxPayCacert/apiclient_cert.pem'; 
            const SSLKEY_PATH = '/home/WxPayCacert/apiclient_key.pem'; 
            const SSLCA_PATH = '/home/WxPayCacert/rootca.pem'; 
         
            //本例程通过curl使用HTTP POST方法,此处可修改其超时时间,默认为30秒 
            const CURL_TIMEOUT = 30; 
        } 
         
        Wxpay_model.php 

    获取到code的URL后,将其分配到页面去,让用户去点击,用户进行点击后,就会从微信服务器获取到code,然后回调到redirect_uri所指的地址去。

    2、获取到code后,会回调到redirect_uri所指向的地址去,这里是到了/Wxpay/confirm/,看看这个confirm方法是打算干嘛的:

        /** 
             * 手机端微信支付,此处是授权获取到code时的回调地址 
             * @param  [type] $orderId 订单编号id 
             * @return [type]          [description] 
             */  
            public function confirm($orderId) { 
                //先确认用户是否登录 
                $this->ensureLogin(); 
                //通过订单编号获取订单数据 
                $order = $this->wxpay_model->get($orderId); 
                //验证订单是否是当前用户 
                $this->_verifyUser($order); 
         
                //取得支付所需要的订单数据 
                $orderData = $this->returnOrderData[$orderId]; 
                //取得jsApi所需要的数据 
                $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); 
                //将数据分配到模板去,在js里使用 
                $this->smartyData['wxJsApiData'] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); 
                $this->smartyData['order'] = $orderData; 
                $this->displayView('wxpay/confirm.tpl'); 
                 
            } 

    这一步开始去取JSAPI支付接口所需要的数据了,这一步算是最主要的一步,这里还会调用统一下单接口获取到prepay_id,我们跳到

    $this->wxpay_model->wxPayJsApi($orderData) 看看:

        /** 
             * 微信jsapi点击支付 
             * @param  [type] $data [description] 
             * @return [type]       [description] 
             */ 
            public function wxPayJsApi($data) { 
                $jsApi = new JsApi_handle(); 
                //统一下单接口所需数据 
                $payData = $this->returnData($data); 
                //获取code码,用以获取openid 
                $code = $_GET['code']; 
                $jsApi->setCode($code); 
                //通过code获取openid 
                $openid = $jsApi->getOpenId(); 
                 
                $unifiedOrderResult = null; 
                if ($openid != null) { 
                    //取得统一下单接口返回的数据 
                    $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); 
                    //获取订单接口状态 
                    $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); 
                    if ($returnMessage['resultCode']) { 
                        $jsApi->setPrepayId($retuenMessage['resultField']); 
                        //取得wxjsapi接口所需要的数据 
                        $returnMessage['resultData'] = $jsApi->getParams(); 
                    }  
         
                    return $returnMessage; 
                } 
            } 

    这里首先是取得下单接口所需要的数据;

    接着获取到code码,通过code码获取到openid;

    然后调用统一下单接口,取得下单接口的响应数据,即prepay_id;

    最后取得微信支付JSAPI所需要的数据。

    这就是上面这个方法所要做的事情,取到数据后,会将数据分配到模板里,然后根据官方文档所给的参考格式将其放在js里,如下面的代码:

        <!doctype html>   
        <html>   
        <head lang="zh-CN">   
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
        <!-- Make sure that we can test against real IE8 --> 
        <meta http-equiv="X-UA-Compatible" content="IE=8" /> 
        <title></title> 
        </head> 
        <body> 
         
        <a href="javascript:callpay();" id="btnOrder">点击支付</a> 
        </body>   
        <script type="text/javascript"> 
            //将数据付给js变量 
            var wxJsApiData = {$wxJsApiData}; 
            function onBridgeReady() 
                { 
                    //格式参考官方文档 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6 
                    WeixinJSBridge.invoke( 
                        'getBrandWCPayRequest', 
                        $.parseJSON(wxJsApiData.resultData), 
                        function(res){ 
                            if(res.err_msg == "get_brand_wcpay_request:ok" ){ 
                                window.location.href="/wxpay/paysuccess/"+{$order.sn};  
                            } 
         
                        }  
                    ); 
                } 
                function callpay() 
                {  
                    if(!wxJsApiData.resultCode){ 
                        alert(wxJsApiData.resultType+","+wxJsApiData.resultMsg+"!"); 
                        return false; 
                    } 
                    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(); 
                    } 
                } 
        </script> 
        </html> 

    3、此时用户只需要点击支付,就可以开始进入支付界面了,接着就是输入密码,确认,最后会提示支付成功,紧接着网站会提供一个支付成功跳转页面。类似微信文档里所提供的图片这样,这里我就直接截取文档里的案例图了:

    基于H5的微信支付开发代码讲解

    4、这里还有一步,就是微信支付系统会异步通知网站后台用户的支付结果。在获取统一下单数据时,我们指定了一个通知地址,在model里可以找到

    基于H5的微信支付开发代码讲解

    支付成功后,微信支付系统会将支付结果异步发送到此地址上/Wxpay/pay_callback/ ,我们来看一下这个方法

        /** 
             * 支付回调接口 
             * @return [type] [description] 
             */ 
            public function pay_callback() { 
                $postData = ''; 
                if (file_get_contents("php://input")) { 
                    $postData = file_get_contents("php://input"); 
                } else { 
                    return; 
                } 
                $payInfo = array(); 
                $notify = $this->wxpay_model->wxPayNotify($postData); 
         
                if ($notify->checkSign == TRUE) { 
                    if ($notify->data['return_code'] == 'FAIL') { 
                        $payInfo['status'] = FALSE; 
                        $payInfo['msg'] = '通信出错'; 
                    } elseif ($notify->data['result_code'] == 'FAIL') { 
                        $payInfo['status'] = FALSE; 
                        $payInfo['msg'] = '业务出错'; 
                    } else { 
                        $payInfo['status'] = TRUE; 
                        $payInfo['msg'] = '支付成功'; 
                        $payInfo['sn']=substr($notify->data['out_trade_no'],8); 
                        $payInfo['order_no'] = $notify->data['out_trade_no']; 
                        $payInfo['platform_no']=$notify->data['transaction_id']; 
                        $payInfo['attach']=$notify->data['attach']; 
                        $payInfo['fee']=$notify->data['cash_fee']; 
                        $payInfo['currency']=$notify->data['fee_type']; 
                        $payInfo['user_sign']=$notify->data['openid']; 
                    } 
                } 
                $returnXml = $notify->returnXml(); 
         
                echo $returnXml; 
         
                $this->load->library('RedisCache'); 
                if($payInfo['status']){ 
                   //这里要记录到日志处理(略) 
                    $this->model->order->onPaySuccess($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo); 
                    $this->redis->RedisCache->set('order:payNo:'.$payInfo['order_no'],'OK',5000); 
                }else{ 
                   //这里要记录到日志处理(略) 
                    $this->model->order->onPayFailure($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo, '订单支付失败 ['.$payInfo['msg'].']'); 
                } 
            } 

    这方法就是对支付是否成功,对网站的支付相关逻辑进行后续处理,例如假如支付失败,就需要记录日志里说明此次交易失败,或者是做某一些逻辑处理,而支付成功又该如何做处理,等等。

    这里我们就分析下这个方法 $this->wxpay_model->wxPayNotify($postData); 对异步返回的数据进行安全性校验,例如验证签名,看看model里的这个方法:

        /** 
             * 微信回调接口返回  验证签名并回应微信 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function wxPayNotify($xml) { 
                $notify = new Wxpay_server(); 
                $notify->saveData($xml); 
                //验证签名,并回复微信 
                //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 
                //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 
                if ($notify->checkSign() == false) { 
                    $notify->setReturnParameter("return_code","FAIL");//返回状态码 
                    $notify->setReturnParameter("return_msg","签名失败");//返回信息 
                } else { 
                    $notify->checkSign=TRUE; 
                    $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 
                } 
         
                return $notify; 
            } 

    如果验证通过,则就开始进行交易成功或者失败时所要做的逻辑处理了,这逻辑处理的代码我就不写了,因为每一个网站的处理方式都不一样,我这里是这样处理的,我把思路写下,方便不懂的朋友可以按着我的思路去完善后续的处理:首先是查看数据库里的订单日志表,看这笔交易之前是否已经交易过了,交易过就不用再更新数据表了,如果没交易过,就会将之前存在redis的订单数据给取出来,再将这些数据插入到订单日志表里,差不多就这样处理。

    好了,基于H5的微信支付接口开发详解就讲到这里,如果你认真理清博文里所讲解的思路,自己基本上也可以尝试开发此接口了,同时只要会了这个,你也基本上可以开发二维码支付,刷卡支付等等的支付接口。

    这里我附上此次开发中的完整代码供大家阅读:

    控制器:Wxpay.php

        <?php 
        defined('BASEPATH') OR exit('No direct script access allowed'); 
         
        class Wxpay extends MY_Controller { 
            public function __construct() { 
                parent::__construct(); 
                $this->load->model('wxpay_model'); 
                //$this->load->model('wxpay'); 
                 
            } 
          
            public function index() { 
                //微信支付 
                $this->smarty['wxPayUrl'] = $this->wxpay_model->retWxPayUrl(); 
                $this->displayView('wxpay/index.tpl'); 
            } 
         
            /** 
             * 手机端微信支付,此处是授权获取到code时的回调地址 
             * @param  [type] $orderId 订单编号id 
             * @return [type]          [description] 
             */  
            public function confirm($orderId) { 
                //先确认用户是否登录 
                $this->ensureLogin(); 
                //通过订单编号获取订单数据 
                $order = $this->wxpay_model->get($orderId); 
                //验证订单是否是当前用户 
                $this->_verifyUser($order); 
         
                //取得支付所需要的订单数据 
                $orderData = $this->returnOrderData[$orderId]; 
                //取得jsApi所需要的数据 
                $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); 
                //将数据分配到模板去,在js里使用 
                $this->smartyData['wxJsApiData'] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); 
                $this->smartyData['order'] = $orderData; 
                $this->displayView('wxpay/confirm.tpl'); 
                 
            } 
            /** 
             * 支付回调接口 
             * @return [type] [description] 
             */ 
            public function pay_callback() { 
                $postData = ''; 
                if (file_get_contents("php://input")) { 
                    $postData = file_get_contents("php://input"); 
                } else { 
                    return; 
                } 
                $payInfo = array(); 
                $notify = $this->wxpay_model->wxPayNotify($postData); 
         
                if ($notify->checkSign == TRUE) { 
                    if ($notify->data['return_code'] == 'FAIL') { 
                        $payInfo['status'] = FALSE; 
                        $payInfo['msg'] = '通信出错'; 
                    } elseif ($notify->data['result_code'] == 'FAIL') { 
                        $payInfo['status'] = FALSE; 
                        $payInfo['msg'] = '业务出错'; 
                    } else { 
                        $payInfo['status'] = TRUE; 
                        $payInfo['msg'] = '支付成功'; 
                        $payInfo['sn']=substr($notify->data['out_trade_no'],8); 
                        $payInfo['order_no'] = $notify->data['out_trade_no']; 
                        $payInfo['platform_no']=$notify->data['transaction_id']; 
                        $payInfo['attach']=$notify->data['attach']; 
                        $payInfo['fee']=$notify->data['cash_fee']; 
                        $payInfo['currency']=$notify->data['fee_type']; 
                        $payInfo['user_sign']=$notify->data['openid']; 
                    } 
                } 
                $returnXml = $notify->returnXml(); 
         
                echo $returnXml; 
         
                $this->load->library('RedisCache'); 
                if($payInfo['status']){ 
                   //这里要记录到日志处理(略) 
                    $this->model->order->onPaySuccess($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo); 
                    $this->redis->RedisCache->set('order:payNo:'.$payInfo['order_no'],'OK',5000); 
                }else{ 
                   //这里要记录到日志处理(略) 
                    $this->model->order->onPayFailure($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo, '订单支付失败 ['.$payInfo['msg'].']'); 
                } 
            } 
         
            /** 
             * 返回支付所需要的数据 
             * @param  [type] $orderId 订单号 
             * @param  string $data    订单数据,当$data数据存在时刷新$orderData缓存,因为订单号不唯一 
             * @return [type]          [description] 
             */ 
            public function returnOrderData($orderId, $data = '') { 
                //获取订单数据 
                $order = $this->wxpay_model->get($orderId); 
                if (0 === count($order)) return false; 
                if (emptyempty($data)) { 
                    $this->load->library('RedisCache'); 
                    //取得缓存在redis的订单数据 
                    $orderData = $this->rediscache->getJson("order:orderData:".$orderId); 
                    if (emptyempty($orderData)) { 
                        //如果redis里没有,则直接读数据库取 
                        $this->load->model('order_model'); 
                        $order = $this->order_model->get($orderId); 
                        if (0 === count($order)) { 
                            return false; 
                        } 
                        $data = $order; 
                    } else { 
                        //如果redis里面有的话,直接返回数据 
                        return $orderData; 
                    } 
                } 
          
                //支付前缓存所需要的数据 
                $orderData['id'] = $data['id']; 
                $orderData['fee'] = $data['fee']; 
         
                //支付平台需要的数据 
                $orderData['user_id'] = $data['user_id']; 
                $orderData['sn'] = $data['cn']; 
                //这是唯一编号 
                $orderData['order_no'] = substr(md5($data['sn'].$data['fee']), 8, 8).$data['sn']; 
                $orderData['fee'] = $data['fee']; 
                $orderData['time'] = $data['time']; 
                $orderData['goods_name'] = $data['goods_name']; 
                $orderData['attach'] = $data['attach']; 
         
                //将数据缓存到redis里面 
                $this->rediscache->set("order:orderData:".$orderId, $orderData, 3600*24); 
                //做个标识缓存到redis,用以判断该订单是否已经支付了 
                $this->rediscache->set("order:payNo:".$orderData['order_no'], "NO", 3600*24); 
         
                return $orderData; 
            } 
         
            private function _verifyUser($order) { 
                if (emptyempty($order)) show_404(); 
                if (0 === count($order)) show_404(); 
                //判断订单表里的用户id是否是当前登录者的id 
                if ($order['user_id'] == $this->uid) return; 
                show_error('只能查看自己的订单'); 
            } 
         
        } 
         
        控制器:Wxpay.php 

    模型:Wxpay_model.php

        <?php 
        defined('BASEPATH') OR exit('No direct script access allowed'); 
         
        class Wxpay_model extends CI_Model { 
            public function __construct() { 
                parent::__construct(); 
            } 
             
            /** 
             * 返回可以获得微信code的URL (用以获取openid) 
             * @return [type] [description] 
             */ 
            public function retWxPayUrl() { 
                $jsApi = new JsApi_handle(); 
                return $jsApi->createOauthUrlForCode(); 
            } 
          
            /** 
             * 微信jsapi点击支付 
             * @param  [type] $data [description] 
             * @return [type]       [description] 
             */ 
            public function wxPayJsApi($data) { 
                $jsApi = new JsApi_handle(); 
                //统一下单接口所需数据 
                $payData = $this->returnData($data); 
                //获取code码,用以获取openid 
                $code = $_GET['code']; 
                $jsApi->setCode($code); 
                //通过code获取openid 
                $openid = $jsApi->getOpenId(); 
                 
                $unifiedOrderResult = null; 
                if ($openid != null) { 
                    //取得统一下单接口返回的数据 
                    $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); 
                    //获取订单接口状态 
                    $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); 
                    if ($returnMessage['resultCode']) { 
                        $jsApi->setPrepayId($retuenMessage['resultField']); 
                        //取得wxjsapi接口所需要的数据 
                        $returnMessage['resultData'] = $jsApi->getParams(); 
                    }  
         
                    return $returnMessage; 
                } 
            } 
         
            /** 
             * 统一下单接口所需要的数据 
             * @param  [type] $data [description] 
             * @return [type]       [description] 
             */ 
            public function returnData($data) { 
                $payData['sn'] = $data['sn']; 
                $payData['body'] = $data['goods_name']; 
                $payData['out_trade_no'] = $data['order_no']; 
                $payData['total_fee'] = $data['fee']; 
                $payData['attach'] = $data['attach']; 
         
                return $payData; 
            } 
         
            /** 
             * 返回统一下单接口结果 (参考https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1) 
             * @param  [type] $payData    [description] 
             * @param  [type] $trade_type [description] 
             * @param  [type] $openid     [description] 
             * @return [type]             [description] 
             */ 
            public function getResult($payData, $trade_type, $openid = null) { 
                $unifiedOrder = new UnifiedOrder_handle(); 
         
                if ($opneid != null) { 
                    $unifiedOrder->setParam('openid', $openid); 
                } 
                $unifiedOrder->setParam('body', $payData['body']);  //商品描述 
                $unifiedOrder->setParam('out_trade_no', $payData['out_trade_no']); //商户订单号 
                $unifiedOrder->setParam('total_fee', $payData['total_fee']);    //总金额 
                $unifiedOrder->setParam('attach', $payData['attach']);  //附加数据 
                $unifiedOrder->setParam('notify_url', base_url('/Wxpay/pay_callback'));//通知地址 
                $unifiedOrder->setParam('trade_type', $trade_type); //交易类型 
         
                //非必填参数,商户可根据实际情况选填 
                //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商户号 
                //$unifiedOrder->setParam("device_info","XXXX");//设备号 
                //$unifiedOrder->setParam("time_start","XXXX");//交易起始时间 
                //$unifiedOrder->setParam("time_expire","XXXX");//交易结束时间 
                //$unifiedOrder->setParam("goods_tag","XXXX");//商品标记 
                //$unifiedOrder->setParam("product_id","XXXX");//商品ID 
                 
                return $unifiedOrder->getResult(); 
            } 
         
            /** 
             * 返回微信订单状态 
             */ 
            public function returnMessage($unifiedOrderResult,$field){ 
                $arrMessage=array("resultCode"=>0,"resultType"=>"获取错误","resultMsg"=>"该字段为空"); 
                if($unifiedOrderResult==null){ 
                    $arrMessage["resultType"]="未获取权限"; 
                    $arrMessage["resultMsg"]="请重新打开页面"; 
                }elseif ($unifiedOrderResult["return_code"] == "FAIL") 
                { 
                    $arrMessage["resultType"]="网络错误"; 
                    $arrMessage["resultMsg"]=$unifiedOrderResult['return_msg']; 
                } 
                elseif($unifiedOrderResult["result_code"] == "FAIL") 
                { 
                    $arrMessage["resultType"]="订单错误"; 
                    $arrMessage["resultMsg"]=$unifiedOrderResult['err_code_des']; 
                } 
                elseif($unifiedOrderResult[$field] != NULL) 
                { 
                    $arrMessage["resultCode"]=1; 
                    $arrMessage["resultType"]="生成订单"; 
                    $arrMessage["resultMsg"]="OK"; 
                    $arrMessage["resultField"] = $unifiedOrderResult[$field]; 
                } 
                return $arrMessage; 
            } 
         
            /** 
             * 微信回调接口返回  验证签名并回应微信 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function wxPayNotify($xml) { 
                $notify = new Wxpay_server(); 
                $notify->saveData($xml); 
                //验证签名,并回复微信 
                //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 
                //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 
                if ($notify->checkSign() == false) { 
                    $notify->setReturnParameter("return_code","FAIL");//返回状态码 
                    $notify->setReturnParameter("return_msg","签名失败");//返回信息 
                } else { 
                    $notify->checkSign=TRUE; 
                    $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 
                } 
         
                return $notify; 
            } 
        } 
         
        /** 
        * JSAPI支付——H5网页端调起支付接口 
        */ 
        class JsApi_handle extends JsApi_common { 
            public $code;//code码,用以获取openid 
            public $openid;//用户的openid 
            public $parameters;//jsapi参数,格式为json 
            public $prepay_id;//使用统一支付接口得到的预支付id 
            public $curl_timeout;//curl超时时间 
         
            function __construct() 
            { 
                //设置curl超时时间 
                $this->curl_timeout = WxPayConf::CURL_TIMEOUT; 
            } 
         
            /** 
             * 生成获取code的URL 
             * @return [type] [description] 
             */ 
            public function createOauthUrlForCode() { 
                //重定向URL 
                $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; 
                $urlParams['appid'] = WxPayConf::APPID; 
                $urlParams['redirect_uri'] = $redirectUrl; 
                $urlParams['response_type'] = 'code'; 
                $urlParams['scope'] = 'snsapi_base'; 
                $urlParams['state'] = "STATE"."#wechat_redirect"; 
                //拼接字符串 
                $queryString = $this->ToUrlParams($urlParams, false); 
                return "https://open.weixin.qq.com/connect/oauth2/authorize?".$queryString; 
            } 
         
            /** 
             * 设置code 
             * @param [type] $code [description] 
             */ 
            public function setCode($code) { 
                $this->code = $code; 
            } 
         
            /** 
             *  作用:设置prepay_id 
             */ 
            public function setPrepayId($prepayId) 
            { 
                $this->prepay_id = $prepayId; 
            } 
         
            /** 
             *  作用:获取jsapi的参数 
             */ 
            public function getParams() 
            { 
                $jsApiObj["appId"] = WxPayConf::APPID; 
                $timeStamp = time(); 
                $jsApiObj["timeStamp"] = "$timeStamp"; 
                $jsApiObj["nonceStr"] = $this->createNoncestr(); 
                $jsApiObj["package"] = "prepay_id=$this->prepay_id"; 
                $jsApiObj["signType"] = "MD5"; 
                $jsApiObj["paySign"] = $this->getSign($jsApiObj); 
                $this->parameters = json_encode($jsApiObj); 
         
                return $this->parameters; 
            } 
         
            /** 
             * 通过curl 向微信提交code 用以获取openid 
             * @return [type] [description] 
             */ 
            public function getOpenId() { 
                //创建openid 的链接 
                $url = $this->createOauthUrlForOpenid(); 
                //初始化 
                $ch = curl_init(); 
                curl_setopt($ch, CURL_TIMEOUT, $this->curl_timeout); 
                curl_setopt($ch, CURL_URL, $url); 
                curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); 
                curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); 
                curl_setopt($ch, CURL_HEADER, FALSE); 
                curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); 
                //执行curl 
                $res = curl_exec($ch); 
                curl_close($ch); 
                //取出openid 
                $data = json_decode($res); 
                if (isset($data['openid'])) { 
                    $this->openid = $data['openid']; 
                } else { 
                    return null; 
                } 
         
                return $this->openid; 
         
            } 
         
            /** 
             * 生成可以获取openid 的URL 
             * @return [type] [description] 
             */ 
            public function createOauthUrlForOpenid() { 
                $urlParams['appid'] = WxPayConf::APPID; 
                $urlParams['secret'] = WxPayConf::APPSECRET; 
                $urlParams['code'] = $this->code; 
                $urlParams['grant_type'] = "authorization_code"; 
                $queryString = $this->ToUrlParams($urlParams, false); 
                return "https://api.weixin.qq.com/sns/oauth2/access_token?".$queryString; 
            } 
        } 
         
        /** 
         * 统一下单接口类 
         */ 
        class UnifiedOrder_handle extends Wxpay_client_handle { 
            public function __construct() { 
                //设置接口链接 
                $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; 
                //设置curl超时时间 
                $this->curl_timeout = WxPayConf::CURL_TIMEOUT; 
            } 
         
        } 
         
        /** 
         * 响应型接口基类 
         */ 
        class Wxpay_server_handle extends JsApi_common{ 
            public $data; //接收到的数据,类型为关联数组 
            public $returnParams;   //返回参数,类型为关联数组 
         
            /** 
             * 将微信请求的xml转换成关联数组 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function saveData($xml) { 
                $this->data = $this->xmlToArray($xml);  
            } 
         
         
            /** 
             * 验证签名 
             * @return [type] [description] 
             */ 
            public function checkSign() { 
                $tmpData = $this->data; 
                unset($temData['sign']); 
                $sign = $this->getSign($tmpData); 
                if ($this->data['sign'] == $sign) { 
                    return true; 
                } 
                return false; 
            } 
         
         
            /** 
             * 设置返回微信的xml数据 
             */ 
            function setReturnParameter($parameter, $parameterValue) 
            { 
                $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); 
            } 
         
            /** 
             * 将xml数据返回微信 
             */ 
            function returnXml() 
            { 
                $returnXml = $this->createXml(); 
                return $returnXml; 
            } 
         
        } 
         
        /** 
         * 请求型接口的基类 
         */ 
        class Wxpay_client_handle extends JsApi_common{ 
            public $params; //请求参数,类型为关联数组 
            public $response; //微信返回的响应 
            public $result; //返回参数,类型类关联数组 
            public $url; //接口链接 
            public $curl_timeout; //curl超时时间 
         
            /** 
             * 设置请求参数 
             * @param [type] $param      [description] 
             * @param [type] $paramValue [description] 
             */ 
            public function setParam($param, $paramValue) { 
                $this->params[$this->tirmString($param)] = $this->trimString($paramValue); 
            } 
         
            /** 
             * 获取结果,默认不使用证书 
             * @return [type] [description] 
             */ 
            public function getResult() { 
                $this->postxml();  
                $this->result = $this->xmlToArray($this->response); 
         
                return $this->result; 
            } 
         
            /** 
             * post请求xml 
             * @return [type] [description] 
             */ 
            public function postxml() { 
                $xml = $this->createXml(); 
                $this->response = $this->postXmlCurl($xml, $this->curl, $this->curl_timeout); 
         
                return $this->response; 
            } 
         
            public function createXml() { 
                $this->params['appid'] = WxPayConf::APPID; //公众号ID 
                $this->params['mch_id'] = WxPayConf::MCHID; //商户号 
                $this->params['nonce_str'] = $this->createNoncestr();   //随机字符串 
                $this->params['sign'] = $this->getSign($this->params);  //签名 
                 
                return $this->arrayToXml($this->params);  
            } 
         
             
         
        } 
         
        /** 
         * 所有接口的基类 
         */ 
        class JsApi_common { 
            function __construct() { 
         
            } 
         
            public function trimString($value) { 
                $ret = null; 
                if (null != $value) { 
                    $ret = trim($value); 
                    if (strlen($ret) == 0) { 
                        $ret = null; 
                    } 
                }  
                return $ret; 
            } 
         
            /** 
             * 产生随机字符串,不长于32位 
             * @param  integer $length [description] 
             * @return [type]          [description] 
             */ 
            public function createNoncestr($length = 32) { 
                $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; 
                $str = ''; 
                for ($i = 0; $i < $length; $i++) { 
                    $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); 
                } 
         
                return $str; 
            } 
         
            /** 
             * 格式化参数 拼接字符串,签名过程需要使用 
             * @param [type] $urlParams     [description] 
             * @param [type] $needUrlencode [description] 
             */ 
            public function ToUrlParams($urlParams, $needUrlencode) { 
                $buff = ""; 
                ksort($urlParams); 
         
                foreach ($urlParams as $k => $v) { 
                    if($needUrlencode) $v = urlencode($v); 
                    $buff .= $k .'='. $v .'&'; 
                } 
         
                $reqString = ''; 
                if (strlen($buff) > 0) { 
                    $reqString = substr($buff, 0, strlen($buff) - 1); 
                } 
         
                return $reqString; 
            } 
         
            /** 
             * 生成签名 
             * @param  [type] $params [description] 
             * @return [type]         [description] 
             */ 
            public function getSign($obj) { 
                foreach ($obj as $k => $v) { 
                    $params[$k] = $v; 
                } 
                //签名步骤一:按字典序排序参数 
                ksort($params); 
                $str = $this->ToUrlParams($params, false);   
                //签名步骤二:在$str后加入key 
                $str = $str."$key=".WxPayConf::KEY; 
                //签名步骤三:md5加密 
                $str = md5($str); 
                //签名步骤四:所有字符转为大写 
                $result = strtoupper($str); 
         
                return $result; 
            } 
         
            /** 
             * array转xml 
             * @param  [type] $arr [description] 
             * @return [type]      [description] 
             */ 
            public function arrayToXml($arr) { 
                $xml = "<xml>"; 
                foreach ($arr as $k => $v) { 
                    if (is_numeric($val)) { 
                        $xml .= "<".$key.">".$key."</".$key.">"; 
                    } else { 
                        $xml .= "<".$key."><![CDATA[".$val."]]></".$key.">"; 
                    } 
                } 
                $xml .= "</xml>"; 
                return $xml; 
            } 
         
            /** 
             * 将xml转为array 
             * @param  [type] $xml [description] 
             * @return [type]      [description] 
             */ 
            public function xmlToArray($xml) { 
                $arr = json_decode(json_encode(simplexml_load_string($xml, 'SinpleXMLElement', LIBXML_NOCDATA)), true); 
         
                return $arr; 
            } 
         
            /** 
             * 以post方式提交xml到对应的接口 
             * @param  [type]  $xml    [description] 
             * @param  [type]  $url    [description] 
             * @param  integer $second [description] 
             * @return [type]          [description] 
             */ 
            public function postXmlCurl($xml, $url, $second = 30) { 
                //初始化curl 
                $ch = curl_init(); 
                //设置超时 
                curl_setopt($ch, CURL_TIMEOUT, $second); 
                curl_setopt($ch, CURL_URL, $url); 
                //这里设置代理,如果有的话 
                //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8'); 
                //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); 
                curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); 
                curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); 
                //设置header 
                curl_setopt($ch, CURL_HEADER, FALSE); 
                //要求结果为字符串且输出到屏幕上 
                curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); 
                //以post方式提交 
                curl_setopt($ch, CURL_POST, TRUE); 
                curl_setopt($ch, CURL_POSTFIELDS, $xml); 
                //执行curl 
                $res = curl_exec($ch); 
         
                if ($res) { 
                    curl_close($ch); 
                    return $res; 
                } else { 
                    $error = curl_errno($ch); 
                    echo "curl出错,错误码:$error"."<br>"; 
                    echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>"; 
                    curl_close($ch); 
                    return false; 
                } 
            } 
        } 
         
        /** 
         * 配置类 
         */ 
        class WxPayConf { 
            //微信公众号身份的唯一标识。 
            const APPID = 'wx654a22c6423213b7'; 
            //受理商ID,身份标识 
            const MCHID = '10043241'; 
            const MCHNAME = 'KellyCen的博客'; 
             
            //商户支付密钥Key。 
            const KEY = '0000000000000000000000000000000'; 
            //JSAPI接口中获取openid 
            const APPSECRET = '000000000000000000000000000'; 
         
            //证书路径,注意应该填写绝对路径 
            const SSLCERT_PATH = '/home/WxPayCacert/apiclient_cert.pem'; 
            const SSLKEY_PATH = '/home/WxPayCacert/apiclient_key.pem'; 
            const SSLCA_PATH = '/home/WxPayCacert/rootca.pem'; 
         
            //本例程通过curl使用HTTP POST方法,此处可修改其超时时间,默认为30秒 
            const CURL_TIMEOUT = 30; 
        } 
         
        模型:Wxpay_model.php 

    视图:index.tpl

        <!doctype html>   
        <html>   
        <head lang="zh-CN">   
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
        <!-- Make sure that we can test against real IE8 --> 
        <meta http-equiv="X-UA-Compatible" content="IE=8" /> 
        <title></title> 
        </head> 
        <body> 
         
        <a href="{$wxPayUrl}">微信支付</a> 
        </body>   
        </html> 
         
        视图:index.tpl 

    视图:confirm.tpl

        <!doctype html>   
        <html>   
        <head lang="zh-CN">   
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
        <!-- Make sure that we can test against real IE8 --> 
        <meta http-equiv="X-UA-Compatible" content="IE=8" /> 
        <title></title> 
        </head> 
        <body> 
         
        <a href="javascript:callpay();" id="btnOrder">点击支付</a> 
        </body>   
        <script type="text/javascript"> 
            //将数据付给js变量 
            var wxJsApiData = {$wxJsApiData}; 
            function onBridgeReady() 
                { 
                    //格式参考官方文档 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6 
                    WeixinJSBridge.invoke( 
                        'getBrandWCPayRequest', 
                        $.parseJSON(wxJsApiData.resultData), 
                        function(res){ 
                            if(res.err_msg == "get_brand_wcpay_request:ok" ){ 
                                window.location.href="/wxpay/paysuccess/"+{$order.sn};  
                            } 
         
                        }  
                    ); 
                } 
                function callpay() 
                {  
                    if(!wxJsApiData.resultCode){ 
                        alert(wxJsApiData.resultType+","+wxJsApiData.resultMsg+"!"); 
                        return false; 
                    } 
                    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(); 
                    } 
                } 
        </script> 
        </html> 
         
        视图:confirm.tpl 

    里面所用到的一些自定义函数可以在我上一篇博文里找找,那里已经提供了代码参考了

    现在我们的线上项目是微信支付,支付宝支付,网银支付信用卡支付的功能都有,并且PC和WAP端都分别对应有。所以整一个支付系统模块还算比较完整,后期有时间我会总结和分享下其他的支付接口开发的博文,希望有兴趣的博友可以关注下哦!!

  • 上一篇:基于H5的微信支付开发思路详解(一)

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