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php微信支付之公众号支付功能
网络编程 2025/10/29 佚名
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网上的很多PHP微信扫码支付接入教程都颇为复杂，且需要配置和引入较多的文件，本人通过整理后给出一个单文件版的，希望可以给各位想接入微信扫码支付的带来些许帮助和借鉴意义。

将该文件放到你的授权目录下，并在微信里访问这个文件，即可看到演示效果。效果如下：

php微信支付之公众号支付功能 php微信支付之公众号支付功能

需要注意的事项：

1.该文件需放到支付授权目录下，可以在微信支付商户平台->产品中心->开发配置中设置。
2.如提示签名错误可以通过微信支付签名验证工具进行验证：微信公众平台支付接口调试工具

代码如下：

<"utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <title>微信支付样例-支付</title>
  <script type="text/javascript">
   //调用微信JS api 支付
   function jsApiCall()
   {
    WeixinJSBridge.invoke(
     'getBrandWCPayRequest',
     <"undefined"){
     if( document.addEventListener ){
      document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
     }else if (document.attachEvent){
      document.attachEvent('WeixinJSBridgeReady', jsApiCall);
      document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
     }
    }else{
     jsApiCall();
    }
   }
  </script>
 </head>
 <body>
 <br/>
 <font color="#9ACD32"><b>该笔订单支付金额为<span style="color:#f00;font-size:50px"><"center">
  <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>
 </div>
 </body>
 </html>
<"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 . ">";
  }
  $xml .= "</xml>";
  file_put_contents('1.txt',$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;
 }
}
"external nofollow" target="_blank" href="https://github.com/dedemao/weixinPay">下载地址


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
标签：
php微信公众号支付,php公众号支付,php微信支付
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