PHP code implements 12306 remaining ticket query and price query functions

<?php
/**
 * 车票接口类
 *
 * @author chepiao100
 *
 */
class chepiao100
{
 /**
  * 接口地址
  * @var string
  */
 private $_apiurl = &#39;https://www.chepiao100.com/api/&#39;;
  /**
   * 返回接口数据
   *
   * @param string $method 接口方法
   * @param array $param 请求参数
   * @return mixed
  */
  function getData($method, $param)
  {
    $post = http_build_query($param);
    $html = $this->fetch_html($this->_apiurl.$method, $post);
    $jsonArr = json_decode($html, TRUE);
    if ( $jsonArr[&#39;errMsg&#39;] == &#39;Y&#39;) {
      return $jsonArr[&#39;data&#39;];
    } else {
      return $jsonArr[&#39;errMsg&#39;];
    }
  }
  /**
   * 请求HTTP
   *
   * @param string $url
   * @param string $post
   * @return mixed
   */
  function fetch_html($url, $post)
  {
   $ch = curl_init($url);
   curl_setopt($ch, CURLOPT_TIMEOUT, 60);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
   curl_setopt($ch, CURLOPT_POST, true);
   //curl_setopt($ch, CURLOPT_PROXY, &#39;https://10.100.10.100:3128&#39;);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
   $html = curl_exec($ch);
   curl_close($ch);
   return $html;
  }
}
/** End class of chepiao100 **/