Re: Validating form field text input to be a specificvariable type

El mi? 07-04-2004 a las 08:05, John W. Holmes escribió: > From: "William Lovaton" <williama_lovaton@coomeva.com.co> > > > Instead of doing a lot of casting, you can use is_numeric() to see if a > > variable is a number or a numeric string. > > Yeah, but the OP wanted to be able to tell an integer from a real number > from a string. is_numeric() is going to validate 5, 5.5, and 5.05E6, for > example. well, an integer is a float too, the real problem is when you type 5.5 in a variable that is expected to be integer. In this case is_numeric() won't do the trick. May be using regexps ([0-9]) will be enough to check integer values but I think it is a bit slower. It is always better to use native functions instead of regexps where possible. -William