Regular Epression for Profile Fields Discussion

[gamerfu]

I am trying to figure out how to code the regular expression as a valid expression for:

0123-4567-8901

I only want to accept '0123456789' and the '-' characters.

Here is the regular expression code vBAdminCP links to:
http://us3.php.net/manual/en/function.preg-match.php

But, I am a bit confused how to control this expression for a mix of numbers and the dash character with the above bolded format.

All ideas welcome.

[Dismounted]

^[0-9]{4}-[0-9]{4}-[0-9]{4}$

[gamerfu]

That helps a lot!

Thank you!

[Dismounted]

There's probably a simplified way of doing it, but I just simply don't know. (I [s]hate[/s]dislike regex. )

[TigerC10]

I would use:

^[0-9]{4}-[0-9]{4}-[0-9]{4}$|^$

That way, the profile field doesn't complain when a user enters a blank. Because the regex overrides the "field required" setting.

[gamerfu]

I added the extra code.

Thank you for the tip.