微信支付之公众号支付

微信支付   
  1. <?php
  2. header('Content-type:text/html; Charset=utf-8');
  3. $mchid = 'xxxxx';  //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送
  4. $appid = 'xxxxx';  //微信支付申请对应的公众号的APPID
  5. $appKey = 'xxxxx';   //微信支付申请对应的公众号的APP Key
  6. $apiKey = 'xxxxx';   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
  7. //①、获取用户openid
  8. $wxPay = new WxpayService($mchid,$appid,$appKey,$apiKey);
  9. $openId = $wxPay->GetOpenid();      //获取openid
  10. if(!$openId) exit('获取openid失败');
  11. //②、统一下单
  12. $outTradeNo = uniqid();     //你自己的商品订单号
  13. $payAmount = 0.01;          //付款金额，单位:元
  14. $orderName = '支付测试';    //订单标题
  15. $notifyUrl = 'https://www.xxx.com/wx/notify.php';  //付款成功后的回调地址(不要有问号)
  16. $payTime = time();      //付款时间
  17. $jsApiParameters = $wxPay->createJsBizPackage($openId,$payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
  18. $jsApiParameters = json_encode($jsApiParameters);
  19. ?>
  20.     <html>
  21.     <head>
  22.         <meta charset="utf-8" />
  23.         <meta name="viewport" content="width=device-width, initial-scale=1"/>
  24.         <title>微信支付样例-支付</title>
  25.         <script type="text/javascript">
  26.             //调用微信JS api 支付
  27.             function jsApiCall()
  28.             {
  29.                 WeixinJSBridge.invoke(
  30.                     'getBrandWCPayRequest',
  31.                     <?php echo $jsApiParameters; ?>,
  32.                     function(res){
  33.                         WeixinJSBridge.log(res.err_msg);
  34.                         if(res.err_msg=='get_brand_wcpay_request:ok'){
  35.                             alert('支付成功！');
  36.                         }else{
  37.                             alert('支付失败：'+res.err_code+res.err_desc+res.err_msg);
  38.                         }
  39.                     }
  40.                 );
  41.             }
  42.             function callpay()
  43.             {
  44.                 if (typeof WeixinJSBridge == "undefined"){
  45.                     if( document.addEventListener ){
  46.                         document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
  47.                     }else if (document.attachEvent){
  48.                         document.attachEvent('WeixinJSBridgeReady', jsApiCall);
  49.                         document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
  50.                     }
  51.                 }else{
  52.                     jsApiCall();
  53.                 }
  54.             }
  55.         </script>
  56.     </head>
  57.     <body>
  58.     <br/>
  59.     <font color="#9ACD32"><b>该笔订单支付金额为<span style="color:#f00;font-size:50px"><?php echo $payAmount?>元</span>钱</b></font><br/><br/>
  60.     <div align="center">
  61.         <button style="width:210px; height:50px; border-radius: 15px;background-color:#FE6714; border:0px #FE6714 solid; cursor: pointer;  color:white;  font-size:16px;" type="button" onclick="callpay()" >立即支付</button>
  62.     </div>
  63.     </body>
  64.     </html>
  65. <?php
  66. class WxpayService
  67. {
  68.     protected $mchid;
  69.     protected $appid;
  70.     protected $appKey;
  71.     protected $apiKey;
  72.     public $data = null;
  73.     public function __construct($mchid, $appid, $appKey,$key)
  74.     {
  75.         $this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号
  76.         $this->appid = $appid; //微信支付申请对应的公众号的APPID
  77.         $this->appKey = $appKey; //微信支付申请对应的公众号的APP Key
  78.         $this->apiKey = $key;   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
  79.     }
  80.     /**
  81.      * 通过跳转获取用户的openid，跳转流程如下：
  82.      * 1、设置自己需要调回的url及其其他参数，跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize
  83.      * 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code
  84.      * @return 用户的openid
  85.      */
  86.     public function GetOpenid()
  87.     {
  88.         //通过code获得openid
  89.         if (!isset($_GET['code'])){
  90.             //触发微信返回code码
  91.             $scheme = $_SERVER['HTTPS']=='on' ? 'https://' : 'http://';
  92.             $uri = $_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING'];
  93.             if($_SERVER['REQUEST_URI']) $uri = $_SERVER['REQUEST_URI'];
  94.             $baseUrl = urlencode($scheme.$_SERVER['HTTP_HOST'].$uri);
  95.             $url = $this->__CreateOauthUrlForCode($baseUrl);
  96.             Header("Location: $url");
  97.             exit();
  98.         } else {
  99.             //获取code码，以获取openid
  100.             $code = $_GET['code'];
  101.             $openid = $this->getOpenidFromMp($code);
  102.             return $openid;
  103.         }
  104.     }
  105.     /**
  106.      * 通过code从工作平台获取openid机器access_token
  107.      * @param string $code 微信跳转回来带上的code
  108.      * @return openid
  109.      */
  110.     public function GetOpenidFromMp($code)
  111.     {
  112.         $url = $this->__CreateOauthUrlForOpenid($code);
  113.         $res = self::curlGet($url);
  114.         //取出openid
  115.         $data = json_decode($res,true);
  116.         $this->data = $data;
  117.         $openid = $data['openid'];
  118.         return $openid;
  119.     }
  120.     /**
  121.      * 构造获取open和access_toke的url地址
  122.      * @param string $code，微信跳转带回的code
  123.      * @return 请求的url
  124.      */
  125.     private function __CreateOauthUrlForOpenid($code)
  126.     {
  127.         $urlObj["appid"] = $this->appid;
  128.         $urlObj["secret"] = $this->appKey;
  129.         $urlObj["code"] = $code;
  130.         $urlObj["grant_type"] = "authorization_code";
  131.         $bizString = $this->ToUrlParams($urlObj);
  132.         return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;
  133.     }
  134.     /**
  135.      * 构造获取code的url连接
  136.      * @param string $redirectUrl 微信服务器回跳的url，需要url编码
  137.      * @return 返回构造好的url
  138.      */
  139.     private function __CreateOauthUrlForCode($redirectUrl)
  140.     {
  141.         $urlObj["appid"] = $this->appid;
  142.         $urlObj["redirect_uri"] = "$redirectUrl";
  143.         $urlObj["response_type"] = "code";
  144.         $urlObj["scope"] = "snsapi_base";
  145.         $urlObj["state"] = "STATE"."#wechat_redirect";
  146.         $bizString = $this->ToUrlParams($urlObj);
  147.         return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;
  148.     }
  149.     /**
  150.      * 拼接签名字符串
  151.      * @param array $urlObj
  152.      * @return 返回已经拼接好的字符串
  153.      */
  154.     private function ToUrlParams($urlObj)
  155.     {
  156.         $buff = "";
  157.         foreach ($urlObj as $k => $v)
  158.         {
  159.             if($k != "sign") $buff .= $k . "=" . $v . "&";
  160.         }
  161.         $buff = trim($buff, "&");
  162.         return $buff;
  163.     }
  164.     /**
  165.      * 统一下单
  166.      * @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
  167.      * @param float $totalFee 收款总费用 单位元
  168.      * @param string $outTradeNo 唯一的订单号
  169.      * @param string $orderName 订单名称
  170.      * @param string $notifyUrl 支付结果通知url 不要有问号
  171.      * @param string $timestamp 支付时间
  172.      * @return string
  173.      */
  174.     public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)
  175.     {
  176.         $config = array(
  177.             'mch_id' => $this->mchid,
  178.             'appid' => $this->appid,
  179.             'key' => $this->apiKey,
  180.         );
  181.         //$orderName = iconv('GBK','UTF-8',$orderName);
  182.         $unified = array(
  183.             'appid' => $config['appid'],
  184.             '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
  185.             'body' => $orderName,
  186.             'mch_id' => $config['mch_id'],
  187.             'nonce_str' => self::createNonceStr(),
  188.             'notify_url' => $notifyUrl,
  189.             'openid' => $openid,            //rade_type=JSAPI，此参数必传
  190.             'out_trade_no' => $outTradeNo,
  191.             'spbill_create_ip' => '127.0.0.1',
  192.             'total_fee' => intval($totalFee * 100),       //单位 转为分
  193.             'trade_type' => 'JSAPI',
  194.         );
  195.         $unified['sign'] = self::getSign($unified, $config['key']);
  196.         $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
  197.         //禁止引用外部xml实体
  198.         libxml_disable_entity_loader(true);        
  199.         $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
  200.         if ($unifiedOrder === false) {
  201.             die('parse xml error');
  202.         }
  203.         if ($unifiedOrder->return_code != 'SUCCESS') {
  204.             die($unifiedOrder->return_msg);
  205.         }
  206.         if ($unifiedOrder->result_code != 'SUCCESS') {
  207.             die($unifiedOrder->err_code);
  208.         }
  209.         $arr = array(
  210.             "appId" => $config['appid'],
  211.             "timeStamp" => "$timestamp",        //这里是字符串的时间戳，不是int，所以需加引号
  212.             "nonceStr" => self::createNonceStr(),
  213.             "package" => "prepay_id=" . $unifiedOrder->prepay_id,
  214.             "signType" => 'MD5',
  215.         );
  216.         $arr['paySign'] = self::getSign($arr, $config['key']);
  217.         return $arr;
  218.     }
  219.     public static function curlGet($url = '', $options = array())
  220.     {
  221.         $ch = curl_init($url);
  222.         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  223.         curl_setopt($ch, CURLOPT_TIMEOUT, 30);
  224.         if (!empty($options)) {
  225.             curl_setopt_array($ch, $options);
  226.         }
  227.         //https请求 不验证证书和host
  228.         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  229.         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  230.         $data = curl_exec($ch);
  231.         curl_close($ch);
  232.         return $data;
  233.     }
  234.     public static function curlPost($url = '', $postData = '', $options = array())
  235.     {
  236.         if (is_array($postData)) {
  237.             $postData = http_build_query($postData);
  238.         }
  239.         $ch = curl_init();
  240.         curl_setopt($ch, CURLOPT_URL, $url);
  241.         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  242.         curl_setopt($ch, CURLOPT_POST, 1);
  243.         curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
  244.         curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
  245.         if (!empty($options)) {
  246.             curl_setopt_array($ch, $options);
  247.         }
  248.         //https请求 不验证证书和host
  249.         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  250.         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  251.         $data = curl_exec($ch);
  252.         curl_close($ch);
  253.         return $data;
  254.     }
  255.     public static function createNonceStr($length = 16)
  256.     {
  257.         $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
  258.         $str = '';
  259.         for ($i = 0; $i < $length; $i++) {
  260.             $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  261.         }
  262.         return $str;
  263.     }
  264.     public static function arrayToXml($arr)
  265.     {
  266.         $xml = "<xml>";
  267.         foreach ($arr as $key => $val) {
  268.             if (is_numeric($val)) {
  269.                 $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
  270.             } else
  271.                 $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
  272.         }
  273.         $xml .= "</xml>";
  274.         return $xml;
  275.     }
  276.     public static function getSign($params, $key)
  277.     {
  278.         ksort($params, SORT_STRING);
  279.         $unSignParaString = self::formatQueryParaMap($params, false);
  280.         $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
  281.         return $signStr;
  282.     }
  283.     protected static function formatQueryParaMap($paraMap, $urlEncode = false)
  284.     {
  285.         $buff = "";
  286.         ksort($paraMap);
  287.         foreach ($paraMap as $k => $v) {
  288.             if (null != $v && "null" != $v) {
  289.                 if ($urlEncode) {
  290.                     $v = urlencode($v);
  291.                 }
  292.                 $buff .= $k . "=" . $v . "&";
  293.             }
  294.         }
  295.         $reqPar = '';
  296.         if (strlen($buff) > 0) {
  297.             $reqPar = substr($buff, 0, strlen($buff) - 1);
  298.         }
  299.         return $reqPar;
  300.     }
  301. }


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