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PHP开发微信公众号文章付费阅读功能！
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$order@R_403_6889@ = 'test'; //订单标题$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,$order@R_403_6889@,$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 @R_403_6889@="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"; } .@R_403_6889@{ 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="@R_403_6889@">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 $order@R_403_6889@ 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, $order@R_403_6889@, $notifyUrl, $timestamp) { $config = array( 'mch_ID' => $this->mchID, 'appID' => $this->appID, 'key' => $this->APIKey, ); $order@R_403_6889@ = iconv('GBK','UTF-8',$order@R_403_6889@); $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' => $order@R_403_6889@, '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。 总结
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