In article <[EMAIL PROTECTED]>,
 [EMAIL PROTECTED] (Joshua E Minnie) wrote:

> Does anybody know of a good way to make sure that a string contains ONLY
> certain characters.  I tried using
> ereg("[~`!@#$%^&*(){}-+=|\\/.,<>'\":;\[\]]", $string); but I get parse
> errors.  Besides that I only want the characters A-Za-z0-9_ in $string.  Is
> there is simpler way to ensure this rather than checking to see if any of
> the characters I don't want are in there?

   echo "Bad characters.";



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