diff --git a/application/controllers/cache.php b/application/controllers/cache.php
index c796d501..50c1bdf4 100644
--- a/application/controllers/cache.php
+++ b/application/controllers/cache.php
@@ -138,14 +138,14 @@ class Cache extends CI_Controller
         $mydir = dir($dir);
         while($f = $mydir->read())
         {
-            if(is_dir("$dir/$f") && $f!="." && $f!=".." && (strpos($dir, '/cn/')==false) && (strpos($dir, '/amp/')==false))
+            if(is_dir("$dir/$f") && $f!="." && $f!=".." && (strpos($dir, '/cn/')===false) && (strpos($dir, '/amp/')===false))
             {
                 $path[] = "$dir/$f";
                 $this->tree("$dir/$f", $file, $path, $file_time);
             }
             else
             {
-                if ($f!='.' && $f!='..' && (strpos($dir, '/cn/')==false) && (strpos($f, '.pdf')===false) && (strpos($f, '/amp/')===false) )
+                if ($f!='.' && $f!='..' && (strpos($dir, '/cn/')===false) && (strpos($f, '.pdf')===false) && (strpos($f, '/amp/')===false) )
                 {
                     $file_temp = str_ireplace('/index.htm###', '', $f.'###');
                     $file_temp = str_ireplace('###', '', $file_temp);