教你用PHP开发微信公众号文章付费阅读功能

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php开发微信公众号文章付费阅读功能！

企业微信截图_15991965528075.png

如上图，一看就懂，就是一片公众号文章，点进去显示标题，作者，时间，公众号名称和部分内容，要想阅读所有内容，那就支付0.01元就可以阅读所有的内容，这就是付费阅读！！！当然金额可以自定义....

其实这个开发原理很简单，无非就是在文章页面加一个微信支付的按钮，点击支付后把隐藏的部分给显示出来或者直接跳转到全文地址。

当然了，这个文章界面也是模仿官方来写的，你可以查看官方的样式，然后模仿就可以了，这个没啥难度。主要是加个按钮在这个页面，下面是这个页面的代码：

readpay.php

<?phpheader('Content-type:text/html; Charset=utf-8');$mchid = '微信支付商户号';          //微信支付商户号$appid = '微信支付申请对应的公众号的APPID';  //微信支付申请对应的公众号的APPID$appKey = '微信支付申请对应的公众号的APPSECRET';   //微信支付申请对应的公众号的APPSECRET$apiKey = 'API密钥';   //帐户设置-安全设置-API安全-API密钥-设置API密钥//①、获取用户openid$wxPay = new WxpayService($mchid,$appid,$appKey,$apiKey);$openId = $wxPay->GetOpenid();      //获取openidif(!$openId) exit('获取openid失败');//②、统一下单$outTradeNo = uniqid();     //你自己的商品订单号$payAmount = 0.01;          //付款金额，单位:元$orderName = 'test';    //订单标题$notifyUrl = 'nofity.php';     //付款成功后的回调地址,一般放在本页面的同级目录即可$payTime = time();      //付款时间$jsApiParameters = $wxPay->createJsBizPackage($openId,$payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);$jsApiParameters = json_encode($jsApiParameters);?>     <!--下面就是木方官方微信文章页面-->    <html>    <head>        <meta charset="utf-8">        <meta name="viewport" content="width=device-width, initial-scale=1"/>        <title>新版微信支持双开，王利芬庆祝“茅侃侃去世”文阅读10w+被批人血馒头</title>        <script type="text/javascript">            //调用微信JS api 支付            function jsApiCall()            {                WeixinJSBridge.invoke(                    'getBrandWCPayRequest',                    <?php echo $jsApiParameters; ?>,                    function(res){                        WeixinJSBridge.log(res.err_msg);                        //alert(res.err_code+res.err_desc+res.err_msg);                        if(res.err_msg == "get_brand_wcpay_request:ok"){                            //支付成功跳转页面                            window.location.href="这里填写支付成功后要跳转的查看全文文章地址";                        }else{                            //支付失败/或取消支付跳转页面，自己自定义开发页面                            window.location.href="false.html";                        }                    }                );            }            function callpay()            {                if (typeof WeixinJSBridge == "undefined"){                    if( document.addEventListener ){                        document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);                    }else if (document.attachEvent){                        document.attachEvent('WeixinJSBridgeReady', jsApiCall);                        document.attachEvent('onWeixinJSBridgeReady', jsApiCall);                    }                }else{                    jsApiCall();                }            }        </script>        <!--下面就是木方官方微信文章页面的CSS-->        <style>            #title{                   margin-bottom:10px;                   line-height:1.4;                   font-weight:400;                   font-size:24px;                   width: 97%;                   margin:0 auto;            }                        #meta_content .time{                color: #8C8C8C;                font-family: "SimHei";            }             .author{                color: #8C8C8C;                font-family: "SimHei";            }             .name{                color: #607fa6;            }             #con{                width:95%;                font-size: 15px;                margin:15px auto 25px;                color: #595757;            }        </style>    </head>    <body>    <br/>    <!--文章标题-->    <h2 id="title">新版微信支持双开，王利芬庆祝“茅侃侃去世”文阅读10w+被批人血馒头</h2>    <div id="meta_content">    <!--发布时间、作者、公众号昵称-->       <span class="time">2018-01-27</span>   <span class="author">tanking</span>   <span class="name">里客云</span>    </div>    <!--显示的部分内容，未支付前显示的内容-->    <div id="con">        这一周，公众号议论最多的有“周冲的影像声色”因洗稿被撕、80后创业者茅侃侃去世、刘亦菲分手......几乎每件事都能在朋友圈刷到相关报道。此外，视频大号“一条”又拿到了新一轮融资，你最关心哪一件事呢？    </div>    <!--支付按钮-->    <div align="center">        <button style="width:180px; height:35px;background: none; border-radius: 5px;border:1px #1AAD19 solid; cursor: pointer;  color:#1AAD19;  font-size:15px;-webkit-tap-highlight-color:rgba(255,0,0,0);" type="button" οnclick="callpay()" >支付0.01阅读全文</button>    </div>    </body>    </html>    <!--下面是微信支付逻辑了--><?phpheader("Content-Type:text/html; charset=utf-8");class WxpayService{    protected $mchid;    protected $appid;    protected $appKey;    protected $apiKey;    public $data = null;    public function __construct($mchid, $appid, $appKey,$key)    {        $this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号        $this->appid = $appid; //微信支付申请对应的公众号的APPID        $this->appKey = $appKey; //微信支付申请对应的公众号的APP Key        $this->apiKey = $key;   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥    }    /**     * 通过跳转获取用户的openid，跳转流程如下：     * 1、设置自己需要调回的url及其其他参数，跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize     * 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code     * @return 用户的openid     */    public function GetOpenid()    {        //通过code获得openid        if (!isset($_GET['code'])){            //触发微信返回code码            $scheme = $_SERVER['HTTPS']=='on' ? 'https://' : 'http://';            $baseUrl = urlencode($scheme.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING']);            $url = $this->__CreateOauthUrlForCode($baseUrl);            Header("Location: $url");            exit();        } else {            //获取code码，以获取openid            $code = $_GET['code'];            $openid = $this->getOpenidFromMp($code);            return $openid;        }    }    /**     * 通过code从工作平台获取openid机器access_token     * @param string $code 微信跳转回来带上的code     * @return openid     */    public function GetOpenidFromMp($code)    {        $url = $this->__CreateOauthUrlForOpenid($code);        $res = self::curlGet($url);        //取出openid        $data = json_decode($res,true);        $this->data = $data;        $openid = $data['openid'];        return $openid;    }    /**     * 构造获取open和access_toke的url地址     * @param string $code，微信跳转带回的code     * @return 请求的url     */    private function __CreateOauthUrlForOpenid($code)    {        $urlObj["appid"] = $this->appid;        $urlObj["secret"] = $this->appKey;        $urlObj["code"] = $code;        $urlObj["grant_type"] = "authorization_code";        $bizString = $this->ToUrlParams($urlObj);        return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;    }    /**     * 构造获取code的url连接     * @param string $redirectUrl 微信服务器回跳的url，需要url编码     * @return 返回构造好的url     */    private function __CreateOauthUrlForCode($redirectUrl)    {        $urlObj["appid"] = $this->appid;        $urlObj["redirect_uri"] = "$redirectUrl";        $urlObj["response_type"] = "code";        $urlObj["scope"] = "snsapi_base";        $urlObj["state"] = "STATE"."#wechat_redirect";        $bizString = $this->ToUrlParams($urlObj);        return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;    }    /**     * 拼接签名字符串     * @param array $urlObj     * @return 返回已经拼接好的字符串     */    private function ToUrlParams($urlObj)    {        $buff = "";        foreach ($urlObj as $k => $v)        {            if($k != "sign") $buff .= $k . "=" . $v . "&";        }        $buff = trim($buff, "&");        return $buff;    }    /**     * 统一下单     * @param string $openid 调用【网页授权获取用户信息】接口获取到用户在该公众号下的Openid     * @param float $totalFee 收款总费用 单位元     * @param string $outTradeNo 唯一的订单号     * @param string $orderName 订单名称     * @param string $notifyUrl 支付结果通知url 不要有问号     * @param string $timestamp 支付时间     * @return string     */    public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)    {        $config = array(            'mch_id' => $this->mchid,            'appid' => $this->appid,            'key' => $this->apiKey,        );        $orderName = iconv('GBK','UTF-8',$orderName);        $unified = array(            'appid' => $config['appid'],            'attach' => 'pay',             //商家数据包，原样返回，如果填写中文，请注意转换为utf-8            'body' => $orderName,            'mch_id' => $config['mch_id'],            'nonce_str' => self::createNonceStr(),            'notify_url' => $notifyUrl,            'openid' => $openid,            //rade_type=JSAPI，此参数必传            'out_trade_no' => $outTradeNo,            'spbill_create_ip' => '127.0.0.1',            'total_fee' => intval($totalFee * 100),       //单位 转为分            'trade_type' => 'JSAPI',        );        $unified['sign'] = self::getSign($unified, $config['key']);        $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);        if ($unifiedOrder === false) {            die('parse xml error');        }        if ($unifiedOrder->return_code != 'SUCCESS') {            die($unifiedOrder->return_msg);        }        if ($unifiedOrder->result_code != 'SUCCESS') {            die($unifiedOrder->err_code);        }        $arr = array(            "appId" => $config['appid'],            "timeStamp" => "$timestamp",        //这里是字符串的时间戳，不是int，所以需加引号            "nonceStr" => self::createNonceStr(),            "package" => "prepay_id=" . $unifiedOrder->prepay_id,            "signType" => 'MD5',        );        $arr['paySign'] = self::getSign($arr, $config['key']);        return $arr;    }    public static function curlGet($url = '', $options = array())    {        $ch = curl_init($url);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_TIMEOUT, 30);        if (!empty($options)) {            curl_setopt_array($ch, $options);        }        //https请求 不验证证书和host        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);        $data = curl_exec($ch);        curl_close($ch);        return $data;    }    public static function curlPost($url = '', $postData = '', $options = array())    {        if (is_array($postData)) {            $postData = http_build_query($postData);        }        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_POST, 1);        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);        curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数        if (!empty($options)) {            curl_setopt_array($ch, $options);        }        //https请求 不验证证书和host        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);        $data = curl_exec($ch);        curl_close($ch);        return $data;    }    public static function createNonceStr($length = 16)    {        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';        $str = '';        for ($i = 0; $i < $length; $i++) {            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);        }        return $str;    }    public static function arrayToXml($arr)    {        $xml = "<xml>";        foreach ($arr as $key => $val) {            if (is_numeric($val)) {                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";            } else                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";        }        $xml .= "</xml>";        return $xml;    }    public static function getSign($params, $key)    {        ksort($params, SORT_STRING);        $unSignParaString = self::formatQueryParaMap($params, false);        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));        return $signStr;    }    protected static function formatQueryParaMap($paraMap, $urlEncode = false)    {        $buff = "";        ksort($paraMap);        foreach ($paraMap as $k => $v) {            if (null != $v && "null" != $v) {                if ($urlEncode) {                    $v = urlencode($v);                }                $buff .= $k . "=" . $v . "&";            }        }        $reqPar = '';        if (strlen($buff) > 0) {            $reqPar = substr($buff, 0, strlen($buff) - 1);        }        return $reqPar;    }}?>

nofity.php

<?php/** * 原生支付（扫码支付）及公众号支付的异步回调通知 * 说明：需要在native.php或者jsapi.php中的填写回调地址。例如：http://www.xxx.com/wx/notify.php * 付款成功后，微信服务器会将付款结果通知到该页面 */header('Content-type:text/html; Charset=utf-8');$mchid = '微信支付商户号';$appid = '公众号APPID'; $apiKey = 'API密钥'; $wxPay = new WxpayService($mchid,$appid,$apiKey);$result = $wxPay->notify();if($result){    //完成你的逻辑    //例如连接数据库，获取付款金额$result['cash_fee']，获取订单号$result['out_trade_no']，修改数据库中的订单状态等;}else{    echo 'pay error';}class WxpayService{    protected $mchid;    protected $appid;    protected $apiKey;    public function __construct($mchid, $appid, $key)    {        $this->mchid = $mchid;        $this->appid = $appid;        $this->apiKey = $key;    }    public function notify()    {        $config = array(            'mch_id' => $this->mchid,            'appid' => $this->appid,            'key' => $this->apiKey,        );        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);        if ($postObj === false) {            die('parse xml error');        }        if ($postObj->return_code != 'SUCCESS') {            die($postObj->return_msg);        }        if ($postObj->result_code != 'SUCCESS') {            die($postObj->err_code);        }        $arr = (array)$postObj;        unset($arr['sign']);        if (self::getSign($arr, $config['key']) == $postObj->sign) {            echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';            return $arr;        }    }    /**     * 获取签名     */    public static function getSign($params, $key)    {        ksort($params, SORT_STRING);        $unSignParaString = self::formatQueryParaMap($params, false);        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));        return $signStr;    }    protected static function formatQueryParaMap($paraMap, $urlEncode = false)    {        $buff = "";        ksort($paraMap);        foreach ($paraMap as $k => $v) {            if (null != $v && "null" != $v) {                if ($urlEncode) {                    $v = urlencode($v);                }                $buff .= $k . "=" . $v . "&";            }        }        $reqPar = '';        if (strlen($buff) > 0) {            $reqPar = substr($buff, 0, strlen($buff) - 1);        }        return $reqPar;    }}

简单说明：

1、新建readpay.php，拷贝上面的代码，修改商户号、appid、appsecret、密钥即可，还有下面的回调地址的路径(nofity.php)，至于支付成功和支付失败跳转的页面按自己的需求修改即可。

支付金额、文章标题】时间、作者、公账号名称等根据自己的需求修改。

要注意，订单标题不能为中文，否则会提示body参数错误什么的。

2、新建nofity.php

把上面的代码拷贝上去，修改商户号、appid、密钥即可。

上传到支付授权目录，然后访问readpay.php页面测试。

3、新建false.html，这个是支付失败的页面，至于支付失败要显示什么或者输出什么，这个根据你的业务来自定义开发。

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