今天研究了个根据IP显示天气的帖子（PHPCHINA原创区），感觉很好，正好又在落伍上见到一个“财迷”在卖他做的根据IP转跳城市分站的程序，鄙视之余就修改了一下根据IP显示天气的代码，效果还不错，只有两个页面和一个DAT格式（纯真）的IP库，很爽，贴出来贡献了：
<?php
class QQWry{
var $StartIP=0;
var $EndIP=0;
var $Country='';
var $Local='';
var $CountryFlag=0; // 标识 Country位置
// 0x01,随后3字节为Country偏移,没有Local
// 0x02,随后3字节为Country偏移，接着是Local
// 其他,Country,Local,Local有类似的压缩。可能多重引用。
var $fp;
var $FirstStartIp=0;
var $LastStartIp=0;
var $EndIpOff=0 ;
function getStartIp($RecNo){
$offset=$this->FirstStartIp+$RecNo * 7 ;
@fseek($this->fp,$offset,SEEK_SET) ;
$buf=fread($this->fp ,7) ;
$this->EndIpOff=ord($buf[4]) + (ord($buf[5])*256) + (ord($buf[6])* 256*256);
$this->StartIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256);
return $this->StartIp;
}
function getEndIp(){
@fseek ( $this->fp , $this->EndIpOff , SEEK_SET ) ;
$buf=fread ( $this->fp , 5 ) ;
$this->EndIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256);
$this->CountryFlag=ord ( $buf[4] ) ;
return $this->EndIp ;
}
function getCountry(){
switch ( $this->CountryFlag ) {
case 1:
case 2:
$this->Country=$this->getFlagStr ( $this->EndIpOff+4) ;
//echo sprintf('EndIpOffset=(%x)',$this->EndIpOff );
$this->Local=( 1 == $this->CountryFlag )? '' : $this->getFlagStr ( $this->EndIpOff+8);
break ;
default :
$this->Country=$this->getFlagStr ($this->EndIpOff+4);
$this->Local=$this->getFlagStr ( ftell ( $this->fp ));
}
}
function getFlagStr ($offset){
$flag=0 ;
while(1){
@fseek($this->fp ,$offset,SEEK_SET) ;
$flag=ord(fgetc($this->fp ) ) ;
if ( $flag == 1 || $flag == 2 ) {
$buf=fread ($this->fp , 3 ) ;
if ($flag==2){
$this->CountryFlag=2;
$this->EndIpOff=$offset - 4 ;
}
$offset=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])* 256*256);
}
else{
break ;
}
}
if($offset<12)
return '';
@fseek($this->fp , $offset , SEEK_SET ) ;
return $this->getStr();
}
function getStr ( )
{
$str='' ;
while ( 1 ) {
$c=fgetc ( $this->fp ) ;
//echo "$cn" ;
if(ord($c[0])== 0 )
break ;
$str.= $c ;
}
//echo "$str n";
return $str ;
}
function qqwry ($dotip='') {
if( !is_string($dotip) || $dotip==''){return;}
if(preg_match("/^127/",$dotip)){$this->Country="本地网络";return ;}
elseif(preg_match("/^192/",$dotip)) {$this->Country="局域网";return ;}
$nRet;
$ip=$this->IpToInt ( $dotip );
$this->fp= fopen(__QQWRY__, "rb");
if ($this->fp == NULL) {
$szLocal= "OpenFileError";
return 1;
}
@fseek ( $this->fp , 0 , SEEK_SET ) ;
$buf=fread ( $this->fp , 8 ) ;
$this->FirstStartIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256);
$this->LastStartIp=ord($buf[4]) + (ord($buf[5])*256) + (ord($buf[6])*256*256) + (ord($buf[7])*256*256*256);
$RecordCount= floor( ( $this->LastStartIp - $this->FirstStartIp ) / 7);
if ($RecordCount <= 1){
$this->Country="FileDataError";
fclose($this->fp) ;
return 2 ;
}
$RangB= 0;
$RangE= $RecordCount;
// Match ...
while ($RangB < $RangE-1)
{
$RecNo= floor(($RangB + $RangE) / 2);
$this->getStartIp ( $RecNo ) ;
if ( $ip == $this->StartIp )
{
$RangB=$RecNo ;
break ;
}
if ($ip>$this->StartIp)
$RangB= $RecNo;
else
$RangE= $RecNo;
}
$this->getStartIp ( $RangB ) ;
$this->getEndIp ( ) ;
if ( ( $this->StartIp <= $ip ) && ( $this->EndIp >= $ip ) ){
$nRet=0 ;
$this->getCountry ( ) ;
//这样不太好..............所以..........
$this->Local=str_replace("（我们一定要解放台湾！！！）", "", $this->Local);
}
else{
$nRet=3 ;
$this->Country='未知' ;
$this->Local='' ;
}
fclose ( $this->fp );
$this->Country=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Country);
$this->Local=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Local);
//////////////看看 $nRet在上面的值是什么0和3，于是将下面的行注释掉
return $nRet ;
//return "$this->Country $this->Local";#如此直接返回位置和国家便可以了
}
function IpToInt($Ip) {
$array=explode('.',$Ip);
$Int=($array[0] * 256*256*256) + ($array[1]*256*256) + ($array[2]*256) + $array[3];
return $Int;
}
}
/*实例演示
$QQWry=new QQWry;
$QQWry->QQWry("60.31.95.255");
$country = $QQWry->Country;
echo $QQWry->Country.",".$QQWry->Local;
*/
?>
看了上面的代码一定很感慨PHP的强大功能吧？
至于如何获取客户端IP不用细谈大家心中自然清楚，但是为了照顾一下和我一样的菜鸟，还是把显示页面的代码顺便贴出来吧：
<?php
header('Content-Type: text/html; charset=utf-8');
$starttime = getmicrotime(); //获得页面开始执行时间
define('WROOT', dirname(__FILE__)); //定义程序目录
function GetIP() { //获取IP
if ($_SERVER["HTTP_X_FORWARDED_FOR"])
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
else if ($_SERVER["HTTP_CLIENT_IP"])
$ip = $_SERVER["HTTP_CLIENT_IP"];
else if ($_SERVER["REMOTE_ADDR"])
$ip = $_SERVER["REMOTE_ADDR"];
else if (getenv("HTTP_X_FORWARDED_FOR"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if (getenv("HTTP_CLIENT_IP"))
$ip = getenv("HTTP_CLIENT_IP");
else if (getenv("REMOTE_ADDR"))
$ip = getenv("REMOTE_ADDR");
else
$ip = "Unknown";
return $ip;
}
define('__QQWRY__', WROOT."/QQWry.Dat"); //QQ的ip库
include_once WROOT.'/QQWry.class.php';
$QQWry=new QQWry;
$QQWry->QQWry(GetIP());
$country = iconv('GB2312','UTF-8',$QQWry->Country);//注意编码，QQWry.DAT读出来的地址默认为GB2312
/*
* 页面转跳部分
*/
if(strstr($country,"郑州")!=NULL){
echo "zhengzhou.abc.com";//...向相应城市页面转跳，本例只是打印网址，转跳代码省略
}
//else if ....更多城市的判断，代码省略
else{
echo $country.iconv('GB2312','UTF-8',$QQWry->Local)."<br/>";
//没有匹配分站的则。。。省略
}
/*
* 获得页面当前时间
*/
function getmicrotime(){
list($msec, $sec) = explode(" ", microtime());
return (float)$sec+(float)$msec;
}
/*
* 获得页面执行时间
*/
function getruntime($starttime){
return getmicrotime()-$starttime;
}
printf('页面执行时间：%.4f秒',getruntime($starttime));
?>
可以了，至于QQWry.DAT文件，建议你去纯真IP的网站上去现在最新版的。
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