fwrite不会打破界限

我写这个:

 $fh = fopen('public/newsletter.txt', 'w');
 foreach($entries as $row) {
        fwrite($fh, 'e-mail\n');
        fwrite($fh, $row->new_email . ';');
 }
 fclose($fh);

期望它是

email
email@example.com;

但我得到

e-mail\nemail@example.com;

我该怎么解决这个问题?