| 
                Could not delete file '$file'.
             | 
                The file named $file (complete path) could not be deleted.
             | 
                Either the file does not exist or you do not have the permission to delete it. So
                check if the file exists and you have permissions on it.
             | 
| 
                Directory name '$dir' is invalid, has to end with '/'
             | 
                You entered a directory for deletion ($recursive = true) without ending '/'.
             | 
                Correct your parameter.
             | 
| 
                Could not delete directory '$dir'.
             | 
                The directory $dir could not be deleted.
             | 
                Maybe the directory is not empty ($recursive = false) or you do not have the permission
                to delete the directory.
             |