禁止IP访问代码

if($_SERVER['HTTP_X_FORWARDED_FOR']){
$onlineip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}elseif($_SERVER['HTTP_CLIENT_IP']){
$onlineip=$_SERVER['HTTP_CLIENT_IP'];
}else{
$onlineip=$_SERVER['REMOTE_ADDR'];
}
$onlineip =substrs($onlineip,16);
//截取IP
function substrs($content,$length) {
if($length && strlen($content)>$length){
$num=0;
for($i=0;$i if(ord($content[$i])>127){
$num++;
}
}
$num%2==1 ? $content=substr($content,0,$length-4):$content=substr($content,0,$length-3);
$content.='..';
}
return $content;
}
//分析IP是否在 列表内
function cvipfrom($ip){
global $ipa0;
$d_ip=explode(".",$ip);
$f_n=file_exists("./ipdata/$d_ip[0].txt") ? "./ipdata/$d_ip[0].txt" : './ipdata/0.txt';
$ip=implode('.',d_ip($d_ip));
$db=fopen($f_n,"rb");
flock($db,LOCK_SH);
$d=fread($db,filesize($f_n));
$s_ip="\n$d_ip[0].$d_ip[1].$d_ip[2]";
if($s=strpos($d,$s_ip)){
!($f=s_ip($db,$s,$ip)) && list($l_d,$ff)=nset($db);
}else{
$s_ip="\n$d_ip[0].$d_ip[1]";
if($s=strpos($d,$s_ip)){
!($f=s_ip($db,$s,$ip)) && list($l_d,$ff)=nset($db);
}elseif($s=strpos($d,"\n$d_ip[0]") && $f_n=='./ipdata/0.txt'){
$s_ip="\n$d_ip[0]";
!($f=s_ip($db,$s,$ip)) && list($l_d,$ff)=nset($db);
}else{
$f='';//IP 没有在受限列表内就返回空
}
}
if(empty($f) && $s!==false){
while(ereg("^$s_ip","\n".$l_d)!==false){
if($ipa0==1 || $f=s_ip($db,$s,$ip,$l_d)) break;
list($l_d,$cff)=nset($db);
$cff && $ff=$cff;
}
}
fclose($db);
return $f ? $f : $ff;
}
function s_ip($db,$s,$ip,$l_d=''){
global $ipa0;
if(!$l_d){
fseek($db,$s+1,SEEK_SET);
$l_d=fgets($db,100);
}
$ip_a=explode("\t",$l_d);
$ip_a[0]=implode('.',d_ip(explode('.',$ip_a[0])));
$ip_a[1]=implode('.',d_ip(explode('.',$ip_a[1])));
if($ip if ($ip>=$ip_a[0] && $ip }
function nset($db){
$l_d=fgets($db,100);
$ip_a=explode("\t",$l_d);
return array($l_d,$ip_a[2].$ip_a[3]);
}
function d_ip($d_ip){
for($i=0; $i $d_ip[$i] = sprintf("%03d", $d_ip[$i]);
}
return $d_ip;
}


$ipfrom=cvipfrom($onlineip);
if(!empty($ipfrom)){ //ipfrom IP来源不为空...禁止访问 显示 FUCK YOU
die("fuck you");
}
?>
[/code]

以上代码偷至 PHPWIND 4.0 ..ipdata请自己到 phpwind.net 下载...
phpwind 用来显示用户来源,偶反其道而行之...直接在 ipdata 内添加受限 IP...