Ban IP access code_PHP tutorial-PHP Tutorial-php.cn

Ban IP access code_PHP tutorial

WBOY

Release： 2016-07-13 17:08:54

Original

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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;$i<$length-3;$i++) {
if(ord($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($ip<$ip_a[0]) $ipa0=1;
if ($ip>=$ip_a[0] && $ip<=$ip_a[1]) return $ip_a[2].$ip_a[3];
}
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<=3; $i++){
                  $d_ip[$i]                                                                                                                                                               }
         return $d_ip;
}

$ipfrom=cvipfrom($onlineip);
if(!empty($ipfrom)){ //ipfrom IP source is not empty... Access is prohibited. Display FUCK YOU
Die("fuck you");
}
?>
[/code]

The above code was stolen to PHPWIND 4.0. Please download ipdata from phpwind.net...
phpwind is used to display the user source, but I do the opposite...add restricted IP directly in ipdata...