diff --git a/cache/index_folder.txt b/cache/index_folder.txt
deleted file mode 100644
index 87bb235..0000000
--- a/cache/index_folder.txt
+++ /dev/null
@@ -1 +0,0 @@
-["C:\/wamp\/www\/wepesi","C:\/wamp\/www\/wepesi\/assets","C:\/wamp\/www\/wepesi\/assets\/css","C:\/wamp\/www\/wepesi\/assets\/css\/font","C:\/wamp\/www\/wepesi\/assets\/css\/font-awesome-4.7.0","C:\/wamp\/www\/wepesi\/assets\/css\/font-awesome-4.7.0\/css","C:\/wamp\/www\/wepesi\/assets\/css\/font-awesome-4.7.0\/fonts","C:\/wamp\/www\/wepesi\/assets\/icon","C:\/wamp\/www\/wepesi\/assets\/img","C:\/wamp\/www\/wepesi\/assets\/js","C:\/wamp\/www\/wepesi\/cache","C:\/wamp\/www\/wepesi\/config","C:\/wamp\/www\/wepesi\/controller","C:\/wamp\/www\/wepesi\/helpers","C:\/wamp\/www\/wepesi\/lang","C:\/wamp\/www\/wepesi\/lang\/en","C:\/wamp\/www\/wepesi\/lang\/fr","C:\/wamp\/www\/wepesi\/middleware","C:\/wamp\/www\/wepesi\/middleware\/Validation","C:\/wamp\/www\/wepesi\/models","C:\/wamp\/www\/wepesi\/route","C:\/wamp\/www\/wepesi\/src","C:\/wamp\/www\/wepesi\/src\/Core","C:\/wamp\/www\/wepesi\/src\/Core\/Event","C:\/wamp\/www\/wepesi\/src\/Core\/Orm","C:\/wamp\/www\/wepesi\/src\/Core\/Routing","C:\/wamp\/www\/wepesi\/src\/Core\/Validation","C:\/wamp\/www\/wepesi\/views"]
\ No newline at end of file
diff --git a/config/function.php b/config/function.php
index 4ef9eca..b3b03db 100644
--- a/config/function.php
+++ b/config/function.php
@@ -43,24 +43,20 @@ function checkFileExtension($fileName)
 function autoIndexFolder(array $exclude_folder = [])
 {
     $app_root = appDirSeparator(dirname(__DIR__));
-    // check if cache directory exists before processing
-    $cash_file_dir = appDirSeparator($app_root . '/cache');
-    if (!file_exists($cash_file_dir)) {
-        mkdir($cash_file_dir, 0777, true);
-    }
-    // define exclude folder to not be affected by the situation.
+
+    // define folder to be excluded to not be affected by the process.
     $exclude = ['vendor', 'test'];
     if (count($exclude_folder)) $exclude = array_merge($exclude, $exclude_folder);
     $implode = implode('|', $exclude);
     $folder_struct = getSubDirectories($app_root);
+
     $filter = array_filter($folder_struct, function ($folder_name) use ($implode) {
         $pattern = "/$implode/i";
         if (!preg_match($pattern, strtolower(trim($folder_name)))) {
             return $folder_name;
         }
     });
-
-    if (!checkCacheContent($cash_file_dir, $filter)) {
+    if (!checkCacheContent($filter,$app_root)) {
         foreach ($filter as $subFolder) {
             if (!is_file($subFolder . '/index.php')) {
                 copy(__DIR__ . '/index.php', $subFolder . '/index.php');
@@ -71,29 +67,30 @@ function autoIndexFolder(array $exclude_folder = [])
 
 /**
  * check content from cache file
- * @param string $cash_file_dir
  * @param array $filter
+ * @param string $app_root
  * @return bool
  */
-function checkCacheContent(string $cash_file_dir, array $filter): bool
+function checkCacheContent(array $filter,string $app_root): bool
 {
     $status = true;
-    $cash_file_path = appDirSeparator($cash_file_dir . '/index_folder.txt');
-    sort($filter);
-    $file_content = json_encode($filter, true);
-    $cache_file = fOpen($cash_file_path, 'a+');
-    if (!is_file($cash_file_path) || filesize($cash_file_path) < 1) {
-        fwrite($cache_file, $file_content);
-    } else {
-        $content = fread($cache_file, filesize($cash_file_path));
-        if ($content != $file_content) {
-            $cache_file = fOpen($cash_file_path, 'w');
-            fwrite($cache_file, $file_content);
-    } else {
-        $status = false;
+    // check if cache directory exists before processing
+    $cash_file_dir = appDirSeparator($app_root . '/cache');
+    if (!file_exists($cash_file_dir)) {
+        mkdir($cash_file_dir, 0777, true);
     }
+    $cash_file_path = appDirSeparator($cash_file_dir . '/index_folder');
+
+    if (!file_exists($cash_file_path)){
+        file_put_contents($cash_file_path, var_export($filter, true));
+    } else {
+        $old_content = file_get_contents($cash_file_path);
+        if (json_encode($old_content, true) != json_encode($filter, true)) {
+            file_put_contents($cash_file_path, var_export($filter, true));
+        } else {
+            $status = false;
+        }
     }
-    fclose($cache_file);
     return $status;
 }
 
diff --git a/index.php b/index.php
index a6872eb..0429f5f 100644
--- a/index.php
+++ b/index.php
@@ -19,8 +19,8 @@
 /**
  *  Generate and index file for redirection (protection) while APP_DEV in production
  */
-if (!getenv('APP_ENV')) {
-    autoIndexFolder();
+if (getenv('APP_ENV') === 'prod') {
+    autoIndexFolder(['assets']);
 }
 
 $appConfiguration = new AppConfiguration();