Forums Scripts & Popups Strip everything but numbers

I want to strip everything except numbers from a string.

For example, a user enters:

123ABC!@456

I want my script to remove the letters 'ABC!@' and just return the numbers they entered. (123456)

How would I do this?

There's many ways.

$remove(123ABC!@456,A,B,C,!,@)

Is one way that returns 123456.

That would work, but the user is not always going to enter that combination of letters and numbers. There's no way to predict what a user is going to enter. I just used that as an example. So, I need an identifier or alias that can strip out everything except numbers.

Usage: $justnums(string)

alias justnums var %a, %b = $regsub($1,/\D/g,,%a) | return %a