is_numeric() will work with variables just fine. So:
if (is_numeric($var)) {
print "Yep, it's numeric";
} else {
print "Nope, it sure isn't a number";
}
Make sure $var is defined. If it's coming from a
form then use $_POST['var'] or similar instead for
reasons described here:
http://www.php.net/variables.external
Regards,
Philip Olson
On Sat, 21 Dec 2002, Beauford.2002 wrote:
> Thanks for the info, but ..... is_numeric does not appear to accept
> variables i.e. is_numeric($num) and ctype gives me the following.
>
> Fatal error: Call to undefined function: ctype_digit() in
> /usr/local/apache/htdocs/.............. on line 6
>
>
>
>
> ----- Original Message -----
> From: "Philip Olson" <[EMAIL PROTECTED]>
> To: "Beauford.2002" <[EMAIL PROTECTED]>
> Cc: "PHP General" <[EMAIL PROTECTED]>
> Sent: Saturday, December 21, 2002 9:50 PM
> Subject: Re: [PHP] Forms and PHP variables
>
>
> >
> > Use is_numeric()
> >
> > http://www.php.net/is_numeric
> >
> > See also the ctype functions which can
> > be read about here:
> >
> > http://www.php.net/ctype
> >
> > And yes, regular expressions are another
> > option but aren't needed here.
> >
> > Regards,
> > Philip Olson
> >
> >
> > On Sat, 21 Dec 2002, Beauford.2002 wrote:
> >
> > > Hi,
> > >
> > > First off, thanks to all those that helped out with my other questions.
> Not
> > > all my problems were solved, but I'm certainly closer. Still working on
> the
> > > same project I need to do the following.
> > >
> > > I have a form where users input numbers only, is there a way I can have
> php
> > > check to make sure a letter or other character didn't get put in by
> > > accident. I was looking at ereg, but not to familiar with this or if it
> > > would work in this case.
> > >
> > > TIA
> > >
> > >
> > >
> > > --
> > > PHP General Mailing List (http://www.php.net/)
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> > >
> >
> >
> > --
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> >
> >
>
>
>
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