Mass Reverse Domain To Ip

<?php
    //error_reporting(0);
    define('red',"\e[31m");
    define("green","\e[32m");
    define('yellow',"\e[33m");
    class ReverseDomain{
        public $list;
        public function Domain(){
            $site = $this->list;
            $exp = explode("\n", $site);
            $array = array_unique($exp);
            foreach ($array as $http) {
                if(!preg_match('#^http(s)?://#',$http)){
                    $a = "http://".$http;
                }
                else {
                    $a = $http;
                }
                $parse = parse_url($a);
                $domain = preg_replace('/^www\./', '', $parse['host']);
                $www = "www.".$domain;
                $host = gethostbyname($www);
                for ($i=0; $i < $host; $i++) {
                    echo green."[+] $host <== [Success]\n";
                    $open = fopen("result.txt",'a+');
                    fwrite($open,"$host\n");
                    fclose($open);
                    break;
                }
            }
        }
        public function headerr(){
            echo red."\n
                         #################################
                         #   Mass Reverse Domain To Ip   #
                         #################################";
            echo yellow."
                         #################################
                         #[!] Coded By ./EcchiExploit [!]#
                         #################################\n\n";
        }
    }
    $reverse = new ReverseDomain();
    $reverse->headerr();
    if(!isset($argv[1])){
        echo "USE : php reverse.php list.txt";
        exit(1);
    }
    else {
        $link = $argv[1];
    }
    if(!file_exists($link)) die("File List ".$link." Not Found");
    $domain =  explode("\n", file_get_contents($link));
    echo "[!] Total Reverse Domain To Ip    : " .count($domain)." [!]\n\n";
    foreach ($domain as $env) {
        $reverse->list = trim($env);
        $reverse->Domain();
    }
?>