PHP开发微信扫码支付

古城微笑少年丶 2022-01-26 13:27 334阅读 0赞

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，只有200行代码，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。

直接运行该文件即可得到一个支付二维码的图片。

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][Link 1]

代码如下：

<?php
    
    header('Content-type:text/html; Charset=utf-8');
    
    $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
    
    $appid = 'xxxxx'; //公众号APPID 通过微信支付商户资料审核后邮件发送
    
    $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
    
    $wxPay = new WxpayService($mchid,$appid,$apiKey);
    
    $outTradeNo = uniqid();   //你自己的商品订单号
    
    $payAmount = 0.01;     //付款金额，单位:元
    
    $orderName = '支付测试';  //订单标题
    
    $notifyUrl = 'https://www.xxx.com/wx/';   //付款成功后的回调地址(不要有问号)
    
    $payTime = time();   //付款时间
    
    $arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);
    
    //生成二维码
    
    $url = 'http://qr.liantu.com/api.php?text='.$arr['code_url'];
    
    echo "<img src='{$url}' style='width:300px;'>";
    
    
    
    class WxpayService
    
    {
    
      protected $mchid;
    
      protected $appid;
    
      protected $apiKey;
    
    
    
      public function __construct($mchid, $appid, $key)
    
      {
    
        $this->mchid = $mchid;
    
        $this->appid = $appid;
    
        $this->apiKey = $key;
    
      }
    
    
    
      /**
    
       * 发起订单
    
       * @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 订单发起时间
    
       * @return array
    
       */
    
      public function createJsBizPackage($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,
    
          'out_trade_no' => $outTradeNo,
    
          'spbill_create_ip' => '127.0.0.1',
    
          'total_fee' => intval($totalFee * 100),    //单位 转为分
    
          'trade_type' => 'NATIVE',
    
        );
    
        $unified['sign'] = self::getSign($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);
    
        }
    
        $codeUrl = (array)($unifiedOrder->code_url);
    
        if(!$codeUrl[0]) exit('get code_url error');
    
        $arr = array(
    
          "appId" => $config['appid'],
    
          "timeStamp" => $timestamp,
    
          "nonceStr" => self::createNonceStr(),
    
          "package" => "prepay_id=" . $unifiedOrder->prepay_id,
    
          "signType" => 'MD5',
    
          "code_url" => $codeUrl[0],
    
        );
    
        $arr['paySign'] = self::getSign($arr, $config['key']);
    
        return $arr;
    
      }
    
    
    
    
    
      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 $postObj;
    
        }
    
      }
    
    
    
      /**
    
       * curl get
    
       *
    
       * @param string $url
    
       * @param array $options
    
       * @return mixed
    
       */
    
      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;
    
      }
    
      /**
    
       * 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;
    
      }
    
    }

github下载地址：[weixinPay][]

以上就是本文的全部内容，希望对大家的学习有所帮助。

参考链接：[https://www.cnblogs.com/yangchunlong/articles/9112108.html][https_www.cnblogs.com_yangchunlong_articles_9112108.html]

[Link 1]: https://pay.weixin.qq.com/wiki/tools/signverify/
[weixinPay]: https://github.com/dedemao/weixinPay
[https_www.cnblogs.com_yangchunlong_articles_9112108.html]: https://www.cnblogs.com/yangchunlong/articles/9112108.html