微信支付之原生支付(扫码支付)

  1. <?php
  2. header('Content-type:text/html; Charset=utf-8');
  3. $mchid = 'xxxx';          //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 = 'xxxx';  //公众号APPID 通过微信支付商户资料审核后邮件发送
  5. $apiKey = 'xxxx';   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
  6. $wxPay = new WxpayService($mchid,$appid,$apiKey);
  7. $outTradeNo = uniqid();     //你自己的商品订单号
  8. $payAmount = 0.01;          //付款金额，单位:元
  9. $orderName = '支付测试';    //订单标题
  10. $notifyUrl = 'https://www.xxx.com/wx/notify.php';     //付款成功后的回调地址(不要有问号)
  11. $payTime = time();      //付款时间
  12. $arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
  13. //生成二维码
  14. $url = 'https://www.kuaizhan.com/common/encode-png?large=true&data='.$arr['code_url'];
  15. echo "<img src='{$url}' style='width:300px;'><br>";
  16. echo '二维码内容：'.$arr['code_url'];
  17. class WxpayService
  18. {
  19.     protected $mchid;
  20.     protected $appid;
  21.     protected $apiKey;
  22.     public function __construct($mchid, $appid, $key)
  23.     {
  24.         $this->mchid = $mchid;
  25.         $this->appid = $appid;
  26.         $this->apiKey = $key;
  27.     }
  28.     /**
  29.      * 发起订单
  30.      * @param float $totalFee 收款总费用 单位元
  31.      * @param string $outTradeNo 唯一的订单号
  32.      * @param string $orderName 订单名称
  33.      * @param string $notifyUrl 支付结果通知url 不要有问号
  34.      * @param string $timestamp 订单发起时间
  35.      * @return array
  36.      */
  37.     public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)
  38.     {
  39.         $config = array(
  40.             'mch_id' => $this->mchid,
  41.             'appid' => $this->appid,
  42.             'key' => $this->apiKey,
  43.         );
  44.         //$orderName = iconv('GBK','UTF-8',$orderName);
  45.         $unified = array(
  46.             'appid' => $config['appid'],
  47.             '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
  48.             'body' => $orderName,
  49.             'mch_id' => $config['mch_id'],
  50.             'nonce_str' => self::createNonceStr(),
  51.             'notify_url' => $notifyUrl,
  52.             'out_trade_no' => $outTradeNo,
  53.             'spbill_create_ip' => '127.0.0.1',
  54.             'total_fee' => intval($totalFee * 100),       //单位 转为分
  55.             'trade_type' => 'NATIVE',
  56.         );
  57.         $unified['sign'] = self::getSign($unified, $config['key']);
  58.         $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
  59.         //禁止引用外部xml实体
  60.         libxml_disable_entity_loader(true);        
  61.         $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
  62.         if ($unifiedOrder === false) {
  63.             die('parse xml error');
  64.         }
  65.         if ($unifiedOrder->return_code != 'SUCCESS') {
  66.             die($unifiedOrder->return_msg);
  67.         }
  68.         if ($unifiedOrder->result_code != 'SUCCESS') {
  69.             die($unifiedOrder->err_code);
  70.         }
  71.         $codeUrl = (array)($unifiedOrder->code_url);
  72.         if(!$codeUrl[0]) exit('get code_url error');
  73.         $arr = array(
  74.             "appId" => $config['appid'],
  75.             "timeStamp" => $timestamp,
  76.             "nonceStr" => self::createNonceStr(),
  77.             "package" => "prepay_id=" . $unifiedOrder->prepay_id,
  78.             "signType" => 'MD5',
  79.             "code_url" => $codeUrl[0],
  80.         );
  81.         $arr['paySign'] = self::getSign($arr, $config['key']);
  82.         return $arr;
  83.     }
  84.     public function notify()
  85.     {
  86.         $config = array(
  87.             'mch_id' => $this->mchid,
  88.             'appid' => $this->appid,
  89.             'key' => $this->apiKey,
  90.         );
  91.         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
  92.         $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
  93.         if ($postObj === false) {
  94.             die('parse xml error');
  95.         }
  96.         if ($postObj->return_code != 'SUCCESS') {
  97.             die($postObj->return_msg);
  98.         }
  99.         if ($postObj->result_code != 'SUCCESS') {
  100.             die($postObj->err_code);
  101.         }
  102.         $arr = (array)$postObj;
  103.         unset($arr['sign']);
  104.         if (self::getSign($arr, $config['key']) == $postObj->sign) {
  105.             echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
  106.             return $postObj;
  107.         }
  108.     }
  109.     /**
  110.      * curl get
  111.      *
  112.      * @param string $url
  113.      * @param array $options
  114.      * @return mixed
  115.      */
  116.     public static function curlGet($url = '', $options = array())
  117.     {
  118.         $ch = curl_init($url);
  119.         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  120.         curl_setopt($ch, CURLOPT_TIMEOUT, 30);
  121.         if (!empty($options)) {
  122.             curl_setopt_array($ch, $options);
  123.         }
  124.         //https请求 不验证证书和host
  125.         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  126.         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  127.         $data = curl_exec($ch);
  128.         curl_close($ch);
  129.         return $data;
  130.     }
  131.     public static function curlPost($url = '', $postData = '', $options = array())
  132.     {
  133.         if (is_array($postData)) {
  134.             $postData = http_build_query($postData);
  135.         }
  136.         $ch = curl_init();
  137.         curl_setopt($ch, CURLOPT_URL, $url);
  138.         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  139.         curl_setopt($ch, CURLOPT_POST, 1);
  140.         curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
  141.         curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
  142.         if (!empty($options)) {
  143.             curl_setopt_array($ch, $options);
  144.         }
  145.         //https请求 不验证证书和host
  146.         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  147.         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  148.         $data = curl_exec($ch);
  149.         curl_close($ch);
  150.         return $data;
  151.     }
  152.     public static function createNonceStr($length = 16)
  153.     {
  154.         $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
  155.         $str = '';
  156.         for ($i = 0; $i < $length; $i++) {
  157.             $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  158.         }
  159.         return $str;
  160.     }
  161.     public static function arrayToXml($arr)
  162.     {
  163.         $xml = "<xml>";
  164.         foreach ($arr as $key => $val) {
  165.             if (is_numeric($val)) {
  166.                 $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
  167.             } else
  168.                 $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
  169.         }
  170.         $xml .= "</xml>";
  171.         return $xml;
  172.     }
  173.     /**
  174.      * 获取签名
  175.      */
  176.     public static function getSign($params, $key)
  177.     {
  178.         ksort($params, SORT_STRING);
  179.         $unSignParaString = self::formatQueryParaMap($params, false);
  180.         $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
  181.         return $signStr;
  182.     }
  183.     protected static function formatQueryParaMap($paraMap, $urlEncode = false)
  184.     {
  185.         $buff = "";
  186.         ksort($paraMap);
  187.         foreach ($paraMap as $k => $v) {
  188.             if (null != $v && "null" != $v) {
  189.                 if ($urlEncode) {
  190.                     $v = urlencode($v);
  191.                 }
  192.                 $buff .= $k . "=" . $v . "&";
  193.             }
  194.         }
  195.         $reqPar = '';
  196.         if (strlen($buff) > 0) {
  197.             $reqPar = substr($buff, 0, strlen($buff) - 1);
  198.         }
  199.         return $reqPar;
  200.     }
  201. }


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