Merge pull request #432 from landy2005/V6

Clean/delete parent cache directory if it empty after call deleteItem()/deleteItems() for Files driver.

Author: Geolim4

src/phpFastCache/Drivers/Files/Driver.php

@@ -118,6 +118,10 @@ protected function driverDelete(CacheItemInterface $item)
         if ($item instanceof Item) {
             $file_path = $this->getFilePath($item->getKey(), true);
             if (file_exists($file_path) && @unlink($file_path)) {
+                $dir = dirname($file_path);
+                if (!(new \FilesystemIterator($dir))->valid()) {
+                    rmdir($dir);
+                }
                 return true;
             } else {
                 return false;
@@ -193,4 +197,4 @@ public static function getRequiredOptions()
     {
         return ['path'];
     }
-}
+}