Reverse IP

<?php
error_reporting(0);
set_time_limit(0);
ini_set('memory_limit', '64M');
echo "
                 _____   _    _   _____   _____  _______
                /  ___| | |  | | /  _  \ /  ___/|__   __|
                | |  _  | |__| | | | | | | |___    | |
                | | | | |  __  | | | | | \___  \   | |
                | |_| | | |  | | | |_| |  ___| |   | |
                \_____/ |_|  |_| \_____/ /_____/   |_|
             ____    _       _____   _____   _____  ___    ___
            |  _ \  | |     /  _  \ /  _  \ |  _  \ \  \  /  /
            | |_) | | |     | | | | | | | | | | |  \ \  \/  /
            |  _ (  | |     | | | | | | | | | | |  |  \    /
            | |_) | | |___  | |_| | | |_| | | |_|  /   |  |
            |____/  |_____| \_____/ \_____/ |_____/    |__|

[*]-----------------------------------------------------------------------[*]
[+] Script Name          : Reverse IP
[+] Version              : 1.0
[+] Programed By         : G-B
[+] Email                : g22b@hotmail.com
[+] Use                  : php $_SERVER[PHP_SELF]
[*]-----------------------------------------------------------------------[*]

";

$a = true;
$chs = array('0','1');

while($a){
    echo "[*]---------------------------Options-------------------------------------[*]\n   [0] - Single IP\n   [1] - Range\n[*]-----------------------------------------------------------------------[*]\n\n[+] Select An Option -> ";
    $b = true;
    while($b){
        $ch = trim(fgets(STDIN,1024));
        if(in_array($ch,$chs)){
            $b = false;
        }else{
            echo "\n[~] Error Try Again.\n\n";
        }
    }
    echo "\n";
    switch($ch){
        case '0':
            ipreverse();
        break;
        case '1':
            rangescan();
        break;
    }
    echo "\n\n[+] Scan Again ? (Y,N) -> ";
    $yn = strtolower(trim(fgets(STDIN,1024)));
    if($yn!='y'){
        echo "\n[*] See U Later, G-B.";
        $a = false;
    }
}
function src($url,$post=false){
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
    curl_setopt($ch,CURLOPT_FOLLOWLOCATION,true);
    curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0');
    if($post){
        curl_setopt($ch,CURLOPT_POST,true);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$post);
    }
    $s = curl_exec($ch);
    curl_close($ch);
    return $s;
}
function getdomains($ip,$host=false){
    $domains = array();
    $targets[] = array('url'=>'http://domains.yougetsignal.com/domains.php','post'=>array('remoteAddress'=>$ip,'key'=>''),'json'=>'domainArray','spe'=>true);
    $targets[] = array('url'=>'http://www.my-ip-neighbors.com/?domain='.$ip,'reg'=>'/<td class="domain" >(.*?)<\/td>/','post'=>false,'spe'=>false);
    $targets[] = array('url'=>'http://sameip.org/ip/'.$ip,'reg'=>'/target="_blank">(.*?) whois<\/a>/','post'=>false,'spe'=>false);
    $targets[] = array('url'=>'http://whois.webhosting.info/'.$ip,'reg'=>'/<a href="http:\/\/whois.webhosting.info\/(.*?).">(.*?)\.<\/a>/','post'=>false,'spe'=>false);
    $targets[] = array('url'=>"http://www.pagesinventory.com/ip/$ip.html",'reg'=>'/<a href="\/domain\/(.*?).html">(.*?)<\/a>/','post'=>false,'spe'=>false);
    $targets[] = array('url'=>'http://www.ip-adress.com/reverse_ip/'.$ip,'reg'=>'/\[<a href="\/whois\/(.*?)">Whois<\/a>\]/','post'=>false,'spe'=>false);


    foreach($targets as $target){
        $src = src($target['url'],$target['post']);
        if(!isset($target['json'])){
            preg_match_all($target['reg'],$src,$infos);
            $info = $infos[1];
        }else{
            $infos = json_decode($src);
            $info = $infos->{$target['json']};
        }
        if($target['spe']){
            $infos = $info;
            $info = array();
            if($infos){
            foreach($infos as $tt){
                $info[] = $tt[0];
            }
            }
        }
        if(count($info) == 0) continue;
        foreach($info as $domain){
            if(!filter_var("http://$domain",FILTER_VALIDATE_URL)) continue;
            $domain = strtolower($domain);
            $domain = str_replace('www.','',$domain);
            if($host AND $domain==$host) continue;
            if(in_array($domain,$domains)) continue;
            $domains[] = $domain;
        }
    }

    return $domains;
}
function genips($from,$to){
    $from = ip2long($from);
    $to = ip2long($to);
    for($from;$from<=$to;$from++){
        echo long2ip($from).'<br />';
    }
}
function test($ip){
    $fp = fsockopen($ip,80,$errno,$errstr,2);
    if($fp){
        fclose($fp);
        return true;
    }else{
        return false;
    }
}
function save($file,$line){
    if(!file_exists($file)){
        file_put_contents($file,"
                 _____   _    _   _____   _____  _______
                /  ___| | |  | | /  _  \ /  ___/|__   __|
                | |  _  | |__| | | | | | | |___    | |
                | | | | |  __  | | | | | \___  \   | |
                | |_| | | |  | | | |_| |  ___| |   | |
                \_____/ |_|  |_| \_____/ /_____/   |_|
             ____    _       _____   _____   _____  ___    ___
            |  _ \  | |     /  _  \ /  _  \ |  _  \ \  \  /  /
            | |_) | | |     | | | | | | | | | | |  \ \  \/  /
            |  _ (  | |     | | | | | | | | | | |  |  \    /
            | |_) | | |___  | |_| | | |_| | | |_|  /   |  |
            |____/  |_____| \_____/ \_____/ |_____/    |__|\n\n");
    }
    $fp = fopen($file,'a');
    fwrite($fp,$line);
    fclose($fp);
}
function rangescan(){
    $a = true;
    while($a){
        $b = true;
        while($b){
            echo "[+] From -> ";
            $from = trim(fgets(STDIN,1024));
            if(filter_var($from,FILTER_VALIDATE_IP)){
                $b = false;
            }else{
                echo "[~] Invalid IP Try Again.\n";
            }
        }
        $b = true;
        while($b){
            echo "[+] To   -> ";
            $to = trim(fgets(STDIN,1024));
            if(filter_var($to,FILTER_VALIDATE_IP)){
                $b = false;
            }else{
                echo "\n[~] Invalid IP Try Again.\n\n";
            }
        }
        $from = ip2long($from);
        $to = ip2long($to);
        if($from>$to){
            echo "\n[~] Invalid Range Try Again.\n\n";
        }else{
            $a = false;
        }
    }
    echo "\n\n";
    $file = long2ip($from)."-".long2ip($to).".txt";
    save($file,"\n+------------------------Range----------------------------------+\n\n");
    $line = "+---------------------------------------------------------------+\n";
    $line .= "|        IP        |             Hostname             | Domains |\n";
    $line .= "+---------------------------------------------------------------+\n";
    echo $line;
    save($file,$line);
    $rdomains = array();
    for($from;$from<=$to;$from++){
        $ip = long2ip($from);
        $line = '';
        if(@test($ip)){
            $fulline = '';
            $line = "| ".$ip.str_repeat(" ",17-strlen($ip))."|";
            save($file,$line);
            echo $line;
            $host = strtolower(gethostbyaddr($ip));
            $line = " ".$host.str_repeat(" ",33-strlen($host))."|";
            save($file,$line);
            echo $line;
            $domains = getdomains($ip,$host);
            $domainsc = count($domains);
            $line = " ".$domainsc.str_repeat(" ",8-strlen($domainsc))."|";
            save($file,$line);
            echo $line;
            $line = "\n+---------------------------------------------------------------+\n";
            save($file,$line);
            echo $line;
            if($domainsc > 0){
                $rdomains[$ip] = array();
                foreach($domains as $domain){
                    if($domain==$host) continue;
                    $rdomains[$ip][] = $domain;
                }
            }
        }
    }
    save($file,"\n\n+------------------------Domains--------------------------------+\n");
    foreach($rdomains as $ip=>$domains){
        save($file,"\n[+] $ip : \n\n");
        foreach($domains as $domain){
            save($file,"     $domain\n");
        }
    }
}
function ipreverse(){
    $a = true;
    while($a){
        echo "[+] Server IP -> ";
        $ip = trim(fgets(STDIN,1024));
        if(filter_var($ip,FILTER_VALIDATE_IP)){
            $a = false;
        }else{
            echo "\n[~] Invalid IP Try Again.\n\n";
        }
    }
    $file = "$ip.txt";
    $domains = getdomains($ip);
    if(count($domains)>0){
        $line = "\n+------------------------Domains--------------------------------+\n\n";
        save($file,$line);
        echo $line;
        foreach($domains as $domain){
            echo "$domain\n";
            save($file,"$domain\n");
        }
    }
    echo "\n[*] ".count($domains)." Domains Founded.\n";
}
?>