PHP 小程序支付

根据code使用PHP 调起小程序支付(基于TP 5.0)

getRandCode(32);
      $data['body'] = "商城消费";
      $data['out_trade_no'] = uniqid();
      $data['total_fee'] = $price * 100;
      $data['spbill_create_ip'] = $_SERVER['REMOTE_ADDR'];
      $data['notify_url'] = "回调地址";
      $data['trade_type'] = "JSAPI";
      $data['openid'] = $openid;
      // 生成sign
      ksort($data);
      $string = '';
      foreach ($data as $key => $v) {
        if (empty($v)) {
          continue;
        }
        $string .= "{$key}={$v}&";
      }
      $string .= "key=" . config("wx.key");
      $sign = strtoupper(md5($string));
      $data['sign'] = $sign;
      // 转xml
      $xml = "";
      foreach ($data as $key => $val) {
        $xml .= "<" . $key . ">" . $val . "";
      }
      $xml .= "";
      // 发送请求
      $res = $this->payCurl($url, 'post', 'xml', $xml);
      if ($res['result_code'] == "FAIL") {
        return returnJson(0, "网络错误", $res);
      }
      $result = array();
      $result['appId'] = $res['appid'];
      $result['timeStamp'] = (string)time();
      $result['nonceStr'] = $res['nonce_str'];
      $result['package'] = "prepay_id=" . $res['prepay_id'];
      $result['signType'] = "MD5";
      ksort($result);
      $str = "";
      foreach ($result as $key => $v) {
        $str .= "{$key}={$v}&";
      }
      $str .= "key=" . config("wx.key");
      $result['paySign'] = strtoupper(md5($str));
      return returnJson(1, "返回数据", $result);
  }
  
  // 取随机字符串
  public function getRandCode($num = 16)
  {
   	  $array = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
      $tmpstr = '';
      $max = count($array);
      for ($i = 1; $i <= $num; $i++) {
        $key = rand(0, $max - 1);
        $tmpstr .= $array[$key];
      }
      return $tmpstr;
  }
  
  // 支付请求
  public function payCurl($url, $type = 'get', $res = 'json', $arr = '')
  {
      //1,初始化
      $ch = curl_init();
      //2,设置参数
      curl_setopt($ch, CURLOPT_URL, $url);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
      if ($type == 'post') {
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);//严格校验
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $arr);
      }
      //3,调用接口
      $exec = curl_exec($ch);
      //4,关闭
      curl_close($ch);
      if ($res == 'json') {
        //成功时会返回 0  所以说下面的if判断不成立
        if (curl_errno($ch)) {
          return curl_errno($ch);
        } else {
          return json_decode($exec, true);
        }
      } elseif ($res == 'xml') {
        $object = simplexml_load_string($exec, 'SimpleXMLElement', LIBXML_NOCDATA);
        $json = json_encode($object);
        return json_decode($json, true);
      } else {
        return $exec;
      }
  }
  
  // 返回值 returnJson方法
  function returnJson($code = '', $msg = '', $data = [])
  {
  	  $returnArr['code'] = $code;
  	  $returnArr['msg'] = $msg;
  	  $returnArr['data'] = $data;
  	  return json($returnArr);
  }