php curl xml传输和转换

 <?php

 /**
  * API
  * User: sgfoot
  * Date: 2017/3/20
  * Time: 18:05
  */
 class apiCurl
 {
     private $config = array(
         'key'     => '7D86A79BA5C4C278E5264D5E910B3A64',
     );
     public function execute($url, $params)
     {
         $baseParams = $this->getParams();
         $apiPrams = array_merge($baseParams, $params);
         $apiPrams['sign'] = $this->getSign($apiPrams);
         $xml = $this->arrayToXml($apiPrams);
         $xml_result = Cpost($url, $xml);
         $result = $this->xmlToArray($xml_result);
         return $result;
     }

     /**
      * 获取基础参数
      * @author: wzl
      * @date: 2017
      * @return array
      */
     protected function getParams()
     {
         $params = array(
             'nonce_str' => $this->getNonce(),
             'sign_type' => 'MD5',
         );
         return $params;
     }

     /**
      *    作用：生成签名
      */
     protected function getSign($Obj)
     {
         foreach ($Obj as $k => $v) {
             $Parameters[$k] = $v;
         }
         //签名步骤一：按字典序排序参数
         ksort($Parameters);
         $String = $this->formatBizQueryParaMap($Parameters, false);
         //echo '【string1】'.$String.'</br>';
         //签名步骤二：在string后加入KEY
         $String = $String . "&key=" . $this->config['key'];
         //echo "【string2】".$String."</br>";
         //签名步骤三：MD5加密
         $String = md5($String);
         //echo "【string3】 ".$String."</br>";
         //签名步骤四：所有字符转为大写
         $result_ = strtoupper($String);
         //echo "【result】 ".$result_."</br>";
         return $result_;
     }

     /**
      *    作用：格式化参数，签名过程需要使用
      */
     protected function formatBizQueryParaMap($paraMap, $urlencode)
     {
         $buff = "";
         ksort($paraMap);
         foreach ($paraMap as $k => $v) {
             if ($urlencode) {
                 $v = urlencode($v);
             }
             $buff .= $k . "=" . $v . "&";
         }
         $reqPar = '';
         if (strlen($buff) > 0) {
             $reqPar = substr($buff, 0, strlen($buff) - 1);
         }
         return $reqPar;
     }
     /**
      *     作用：将xml转为array
      */
     protected function xmlToArray($xml)
     {
         //将XML转为array
         $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
         return $array_data;
     }
     /**
      *     作用：array转xml
      */
     protected function arrayToXml($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;
     }
 }