public function postCsv() { $mailing = Mailing::all(); $file_path = 'mailing.csv'; $dados = ''; $dados .= 'EMAIL'; $dados .= "\n"; foreach ($mailing as $m) { $dados .= $m->email; $dados .= "\n"; } if (fwrite($file = fopen($file_path, 'w+'), $dados)) { fclose($file); return Response::download($file_path); } }