Write a PHP in a PHP

I'm tryning to create a new php file from php.

My final php file must look like this:

<?
    $text_1 = "Text";
    $text_2 = "Banana";
?>

Actually my php to generate it is the following: $file = fopen("../lang/_____fr-CA.php", "w") or die("Unable to open file!");

<?
    $datas .= '$text_1 = "Text"; n ';
    $datas .= '$text_2 = "Banana"; n ';

    $datas = nl2br("&lt;? n".$datas."n ?&gt;");

    fwrite($file, $datas);
    fclose($file);
?>

My problem is the generated php looks like this:

&lt;? <br />
$text_1 = "Text"; n$text_2 = "Banana"; n<br />
 ?&gt;