RE: [PHP] is_numeric for php3
| From: | scott [gts] | Date: | Tue, 28 Aug 2001 22:41:21 +0000 |
| Subject: | RE: [PHP] is_numeric for php3 | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-64908@lists.php.net to get a copy of this message | ||
my understanding is that numeric is a broad term for
number values (any value with only numbers and a
decimal point) like 1, 5.6, 332, 0.5532, for example.
integers are a sub-set of numerics, so any integer is
a numeric value, but any numeric value is not
necessarily an integer.
$num=123 is an integer *and* numeric value.
$num='123' might not be an integer, but it is
a numeric.
now the problem of how to devise a proper test for
numeric values (without using regexps) is what i'd
like to see.
> -----Original Message-----
> From: daniel james [mailto:cgi_guy1313@yahoo.com]
> Subject: Re: [PHP] is_numeric for php3
>
> Hi Philip,
>
> By definition, any string that does not contain
> alpha-characters is numeric. I mean, '123' is an
> integer, if only because it isn't 'onetwothree', you
> know?