Matching a filename

I wanna match the incorrect filename with the next regular expression
but it doesn´t work. Why? I don´t know.

if (ereg("[^A-Za-z0-9\.]+", $str))
return false;
else
return true;

I wanna allow only letters (A-Za-z) and numbers (0-9) and of course a
dot for the extension.

Have anybody any suggestion or idea? Any idea would be appreciated!!


Fran García

On 2005-02-25, Fran Garcia <fgarcia@ua.es> wrote:
> I wanna match the incorrect filename with the next regular expression
> but it doesn´t work. Why? I don´t know.
>
> if (ereg("[^A-Za-z0-9\.]+", $str))
> return false;
> else
> return true;

return preg_match("#^[A-Za-z0-9\.]+$#", $str)

but what about $string = "C:\\My Documents" ?




--
Met vriendelijke groeten,
Tim Van Wassenhove <http://www.timvw.info>

"Tim Van Wassenhove" <timvw@users.sourceforge.net> wrote in message
news:3891bhF5kv67lU1@individual.net...
> On 2005-02-25, Fran Garcia <fgarcia@ua.es> wrote:
> > I wanna match the incorrect filename with the next regular expression
> > but it doesn´t work. Why? I don´t know.
> >
> > if (ereg("[^A-Za-z0-9\.]+", $str))
> > return false;
> > else
> > return true;
>
> return preg_match("#^[A-Za-z0-9\.]+$#", $str)
>
> but what about $string = "C:\\My Documents" ?

preg_match('/^[\w\.]+$/', $str) is more compact; covers the underscore as
well.