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基于H5的微信支付开发详解

程序员文章站 2022-03-22 15:56:57
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  这次总结一下用户在微信内打开网页时,可以调用微信支付完成下单功能的模块开发,也就是在微信内的H5页面通过jsApi接口实现支付功能。当然了,微信官网上的微信支付开发文档也讲解的很详细,并且有实现代码可供参考,有的朋友直接看文档就可以自己实现此支付接口的开发了。

  一、前言

  为何我还写一篇微信支付接口的博文呢?第一,我们必须知道,所谓的工作经验很多都是靠总结出来的,你只有总结了更多知识,积累了更多经验,你才能在该行业中脱颖而出,我个人觉得如今的招聘,很多都需要工作经验(1年、3年、5年....),其实,工作时间的长久不能衡量一个人技术水平的高低,有的人一年的工作经验能拿3年工作经验的程序猿的工资,有的3年工作经验的却有可能比别人只有一年工作经验的还低,所以说,总结才能让自己的知识体系,经验深度更牛逼更稳固(虽然写一篇博文挺花费时间的);第二,写博文分享给大家还是挺有成就感的,首先是能让新手从我分享的博文中能学到东西,并且能快速将博文所讲解的技术运用到实际中来,所以我写的博文基本上能让新人快速读懂并且容易理解,另外,技术大神的话,看到博文有讲解的不对之处,还可以指出,并且可以交流,何乐而不为呢,我们需要的就是分享和交流。

  扯远了,直接进入该主题的详解。

  现在的微信支付方式有N种,看下图,有刷卡支付、公众号支付、扫码支付和APP支付,另外还有支付工具的开发,本博文选择的是公众号支付借口而开发进行讲解,其他几种支付接口开发基本上思路都是一样的,只要你能看懂我这博文所讲解的基本思路,你基本上也能独自开发其他几个支付接口。

基于H5的微信支付开发详解

  二、思路详解

  我们可以拿微信支付接口文档里的业务流程时序图看看,如下图,基本思路是这样子:首先在后台生成一个链接,展示给用户让用户点击(例如页面上有微信支付的按钮),用户点击按钮后,网站后台会根据订单的相关信息生成一个支付订单,此时会调用统一下单接口,对微信支付系统发起请求,而微信支付系统受到请求后,会根据请求过来的数据,生成一个 预支付交易会话标识(prepay_id,就是通过这个来识别该订单的),我们的网站收到微信支付系统的响应后,会得到prepay_id,然后通过自己构造微信支付所需要的参数,接着将支付所需参数返回给客户端,用户此时可能会有一个订单信息页,会有一个按钮,点击支付,此时会调用JSAPI接口对微信支付系统发起 请求支付,微信支付系统检查了请求的相关合法性之后,就会提示输入密码,用户此时输入密码确认,微信支付系统会对其进行验证,通过的话会返回支付结果,然后微信跳转会H5页面,这其中有一步是异步通知网站支付结果,我们网站需要对此进行处理(比如说异步支付结果通过后,需要更新数据表或者订单信息,例如标志用户已支付该订单了,同时也需要更新订单日志,防止用户重复提交订单)。

基于H5的微信支付开发详解

  三、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(详情可看这https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1),而获取openid需要先获取code(详情可看这微信登录接口),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

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>  
<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的微信支付开发详解

  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的微信支付开发详解

  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:

 <?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($order)) return false;
        if (empty($data)) {
            $this->load->library('RedisCache');
            //取得缓存在redis的订单数据
            $orderData = $this->rediscache->getJson("order:orderData:".$orderId);
            if (empty($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($order) {
        if (empty($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

控制器:Wxpay.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

 <!doctype html>  
<html>  
<head>  
<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

 
<!doctype html>
<html>
<head>
<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。

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相关标签: H5 微信支付