PHP implements method of obtaining detailed IP address based on Sina IP library

<?php
class Tool{
  /**
   * 获取IP的归属地( 新浪IP库 )
   *
   * @param $ip String    IP地址：112.65.102.16
   * @return Array
   */
  static public function getIpCity($ip)
  {
    $ip = preg_replace("/\s/","",preg_replace("/\r\n/","",$ip));
    $link = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=".$ip."&t=".time();
    $ipJson = self::httpCurl($link);
    preg_match("/\"country\":\"(.*)\"/Uis",$ipJson, $match1);
    preg_match("/\"province\":\"(.*)\"/Uis",$ipJson, $match2);
    preg_match("/\"city\":\"(.*)\"/Uis",$ipJson, $match3);
    return array(
      &#39;country&#39;=>self::ucode2zh($match1[1]), // 国家
      &#39;province&#39;=>self::ucode2zh($match2[1]), // 省
      &#39;city&#39;=>self::ucode2zh($match3[1])   // 城市
    );
  }
  /**
   * Curl方式获取信息
   */
  static public function httpCurl($url)
  {
    $curl_handle = curl_init();
    curl_setopt($curl_handle, CURLOPT_URL, $url);
    curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT,2);
    curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl_handle, CURLOPT_FAILONERROR,1);
    $file_content = curl_exec($curl_handle);
    curl_close($curl_handle);
    return $file_content;
  }
  /**
   * 将unicode编码转化为中文，转化失败返回原字符串
   *
   * @param $code String   unicode编码
   * @return String
   */
  static public function ucode2zh($code)
  {
    $temp = explode(&#39;\u&#39;,$code);
    $rslt = array();
    array_shift($temp);
    foreach($temp as $k => $v)
    {
      $v = hexdec($v);
      $rslt[] = &#39;&#39; . $v . &#39;;&#39;;
    }
    $r = implode(&#39;&#39;,$rslt);
    return empty($r) ? $code : $r;
  }
}

<?php
$ipStr = Tool::getIpCity(&#39;112.65.102.16&#39;);
print_r($ipStr);

Array ( [country] => 中国 [province] => 上海 [city] => 上海 )