How can I test if a string only contains invalid characters
Hi
I need to create a function to test if a string does not contain any valid characters
e.g. '########' or '********' etc.
If the string contains at least one character that is numeric or letters 'A' - 'Z' then I want to return the string. Otherwise I plan to filter it out.
Can anyone please suggest the best way to test for this?
Thanks
GB