if (!empty($request->files) && $request->hasFile('csv_file')) {
$file = $request->file('csv_file');
$type = $file->getClientOriginalExtension();
$real_path = $file->getRealPath();
if ($type <> 'csv') {
Alert::error('Wrong file extension', 'Only CSV is allowed')->persistent('close');
return redirect()->back();
}
$data = $this->readCSV($real_path, array('delimiter' => ','));
}