[thelist] Dumb PHP question.

I was looking at regexps in PHP last night (at home, so this is all from
memory). In your php source directory (if you are running under Linux)
you'll find a directory called regex. In that directory, you can point man
at a file called regex.7 to get some good background information on the
Posix style of regex that PHP uses! 

One of the main bits was that there's a way to check whether certain "atoms"
are numeric which I think was [:isnum:], looking at the information here
http://www.php.net/manual/function.ereg.php it appears that using [0-9] also
works. So I would suggest something along the lines of

if (ereg("^[,.0-9]+$", $amount) {
	do something;
} else {
	complain loudly;
}

.steve


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> -----Original Message-----
> From: Eduardo Dominguez [mailto:edmz@emonterrey.com]
> Sent: den 14 september 2000 01:10
> To: thelist@lists.evolt.org
> Subject: RE: [thelist] Dumb PHP question.
> 
> 
> Regular expressions will do that. I am not good with regex, but i know
> that is trivial. You should be able to find a regex that solves that
> problem.
> 
> You should be using the ereg() function of php.
> 
> http://www.php.net/manual/function.ereg.php for more info.
> 
> 
> 
> -----Mensaje original-----
> De: thelist-admin@lists.evolt.org
> [mailto:thelist-admin@lists.evolt.org]En nombre de Michael Barrett
> Enviado el: Wednesday, September 13, 2000 3:40 PM
> Para: thelist@lists.evolt.org
> Asunto: [thelist] Dumb PHP question.
> 
> 
> howdy howdy
> 
> I have a dumb PHP quandry.
> 
> I want to prevent users from entering anything but numbers 
> (currency) into a
> form, commas and periods/ decimals are ok.
> 
> here is the test URL
> http://flexitimecd.industryimagebank.com/demo/custom_cd.html
> 
> thanks
> 
> 
> 
> -- Michael
> -O^O-