RCS file: /forum21/install/forum_data/src/register.php.t,v
retrieving revision 1.181
diff -u -a -r1.181 register.php.t
--- install/forum_data/src/register.php.t	15 Sep 2009 18:11:29 -0000	1.181
+++ install/forum_data/src/register.php.t	22 Oct 2009 17:09:58 -0000
@@ -55,15 +55,14 @@
 
 function sanitize_login($login)
 {
-	$list = '&'.chr(173);
+	// Remove control, formatting, and surrogate characters.
+	$login = preg_replace( '/[\p{Cc}\p{Cf}\p{Cs}]/u', ' ', $login);
 
-	for ($i = 0; $i < 32; $i++) {
-		$list .= chr($i);
-	}
-	for ($i = 127; $i < 161; $i++) {
-		$list .= chr($i);
-	}
-	return strtr($login, $list, str_repeat(" ", strlen($list)));
+	// Other "bad" characters to remove.
+	$badchars = '&';
+	for ($i = 0; $i < 32; $i++) $badchars .= chr($i);
+
+	return strtr($login, $badchars, str_repeat(' ', strlen($badchars)));
 }
 
 function register_form_check($user_id)