Removing directory using codeigniter

You can delete all files using delete_files function

$path=$this->config->base_url().'dir_name';
$this->load->helper("file"); // load the helper
delete_files($path, true); // delete all files/folders

Above code will delete all files and folders from the given path and if once the directory is empty then you can use rmdir which deletes an empty directory, like

rmdir($path);

The folder should permit relevant permissions, which means files/folder must be writable or owned by the system in order to be deleted.