Stip all chars in string, leave numerics

Anon

I need advice on how i should strip all characters in a string(including special chars) but leave numbers (0-9) and store this in a $formatted_string. Any ideas how i do this an easy way?

So if i have a string with value "abcd*()123" i want the output to be "123"

Thanks in advance.
Anders

Anon

A relatively quick (and probably unsafe!) way of doing this would be:

$numbers_only = ereg_replace("[^[0-9]]", "", $numbers_and_other_stuff);

"unsafe" because it turns '123abc()456' into '123456' which may not be what you want.

HTH,