ini_set('user_agent','Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; GreenBrowser)');
$url='http://www.baidu.com';
echo $flg=@file_get_contents($url);

Baiduspider+(+http://www.baidu.com/search/spider.htm)       百度蜘蛛User_agent
Sosospider+(+http://help.soso.com/webspider.htm)      SOSO蜘蛛User_agent
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)      GOOGLE蜘蛛User_agent
Mozilla/5.0+(compatible;+Yahoo!+Slurp;+http://help.yahoo.com/help/us/ysearch/slurp)      Yahoo蜘蛛User_agent
Mozilla/5.0 (compatible; YoudaoBot/1.0; http://www.youdao.com/help/webmaster/spider/; )      有道蜘蛛User_agent

<?php

$ip=$_SERVER['REMOTE_ADDR'];
//测试1
echo convertip($ip).'<br />';
//测试2
echo convertip('123.114.33.77');

function convertip($ip) {
  if(!preg_match("/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/", $ip)) return 'Invalid IP Address';

  $iparray = explode('.', $ip);

  if($iparray[0] == 10 || $iparray[0] == 127 || ($iparray[0] == 192 && $iparray[1] == 168) || ($iparray[0] == 172 && ($iparray[1] >= 16 && $iparray[1] <= 31))) {
    return 'LAN';
  } elseif($iparray[0] > 255 || $iparray[1] > 255 || $iparray[2] > 255 || $iparray[3] > 255) {
    return 'Invalid IP Address';
  }

  if(!$fd = @fopen('QQWry.Dat', 'rb')) {
    return 'Invalid IP data file';
  }

  $ip = explode('.', $ip);
  $ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];

  if(!($DataBegin = fread($fd, 4)) || !($DataEnd = fread($fd, 4)) ) return;
  @$ipbegin = implode('', unpack('L', $DataBegin));
  if($ipbegin < 0) $ipbegin += pow(2, 32);
  @$ipend = implode('', unpack('L', $DataEnd));
  if($ipend < 0) $ipend += pow(2, 32);
  $ipAllNum = ($ipend - $ipbegin) / 7 + 1;

  $BeginNum = $ip2num = $ip1num = 0;
  $ipAddr1 = $ipAddr2 = '';
  $EndNum = $ipAllNum;

  while($ip1num > $ipNum || $ip2num < $ipNum) {
    $Middle= intval(($EndNum + $BeginNum) / 2);

    fseek($fd, $ipbegin + 7 * $Middle);
    $ipData1 = fread($fd, 4);
    if(strlen($ipData1) < 4) {
      fclose($fd);
      return 'System Error';
    }
    $ip1num = implode('', unpack('L', $ipData1));
    if($ip1num < 0) $ip1num += pow(2, 32);

    if($ip1num > $ipNum) {
      $EndNum = $Middle;
      continue;
    }

    $DataSeek = fread($fd, 3);
    if(strlen($DataSeek) < 3) {
      fclose($fd);
      return 'System Error';
    }
    $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
    fseek($fd, $DataSeek);
    $ipData2 = fread($fd, 4);
    if(strlen($ipData2) < 4) {
      fclose($fd);
      return 'System Error';
    }
    $ip2num = implode('', unpack('L', $ipData2));
    if($ip2num < 0) $ip2num += pow(2, 32);

    if($ip2num < $ipNum) {
      if($Middle == $BeginNum) {
        fclose($fd);
        return 'Unknown';
      }
      $BeginNum = $Middle;
    }
  }

  $ipFlag = fread($fd, 1);
  if($ipFlag == chr(1)) {
    $ipSeek = fread($fd, 3);
    if(strlen($ipSeek) < 3) {
      fclose($fd);
      return 'System Error';
    }
    $ipSeek = implode('', unpack('L', $ipSeek.chr(0)));
    fseek($fd, $ipSeek);
    $ipFlag = fread($fd, 1);
  }

  if($ipFlag == chr(2)) {
    $AddrSeek = fread($fd, 3);
    if(strlen($AddrSeek) < 3) {
      fclose($fd);
      return 'System Error';
    }
    $ipFlag = fread($fd, 1);
    if($ipFlag == chr(2)) {
      $AddrSeek2 = fread($fd, 3);
      if(strlen($AddrSeek2) < 3) {
        fclose($fd);
        return 'System Error';
      }
      $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
      fseek($fd, $AddrSeek2);
    } else {
      fseek($fd, -1, SEEK_CUR);
    }

    while(($char = fread($fd, 1)) != chr(0))
    $ipAddr2 .= $char;

    $AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
    fseek($fd, $AddrSeek);

    while(($char = fread($fd, 1)) != chr(0))
    $ipAddr1 .= $char;
  } else {
    fseek($fd, -1, SEEK_CUR);
    while(($char = fread($fd, 1)) != chr(0))
    $ipAddr1 .= $char;

    $ipFlag = fread($fd, 1);
    if($ipFlag == chr(2)) {
      $AddrSeek2 = fread($fd, 3);
      if(strlen($AddrSeek2) < 3) {
        fclose($fd);
        return 'System Error';
      }
      $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));
      fseek($fd, $AddrSeek2);
    } else {
      fseek($fd, -1, SEEK_CUR);
    }
    while(($char = fread($fd, 1)) != chr(0))
    $ipAddr2 .= $char;
  }
  fclose($fd);

  if(preg_match('/http/i', $ipAddr2)) {
    $ipAddr2 = '';
  }
  $ipaddr = "$ipAddr1 $ipAddr2";
  $ipaddr = preg_replace('/CZ88\.NET/is', '', $ipaddr);
  $ipaddr = preg_replace('/^\s*/is', '', $ipaddr);
  $ipaddr = preg_replace('/\s*$/is', '', $ipaddr);
  if(preg_match('/http/i', $ipaddr) || $ipaddr == '') {
    $ipaddr = 'Unknown';
  }

  return $ipaddr;
}


?>