PHP基于新浪IP库获取IP详细地址的方法

<?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, $match3);
    return array(
      'country'=>self::ucode2zh($match1[1]), // 国家
      'province'=>self::ucode2zh($match2[1]), // 省
      'city'=>self::ucode2zh($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)
  {
    $temp = explode('\u',$code);
    $rslt = array();
    array_shift($temp);
    foreach($temp as $k => $v)
    {
      $v = hexdec($v);
      $rslt[] = '' . $v . ';';
    }
    $r = implode('',$rslt);
    return empty($r) ? $code : $r;
  }
}

<?php
$ipstr = tool::getipcity('112.65.102.16');
print_r($ipstr);

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