Posted by Chris Shiflett on 09/22/05 02:21

Mikey wrote:
> I have found that adding 0 and then running is_int() usually works.

You mean always works. :-) Casting something to an integer and then
checking to see if it's an integer doesn't tell you anything useful:

<?php

$int = 'this is not an int';
$int += 0;

if (is_int($int))
{
echo '$int is an integer';
}

?>

You're always going to see "$int is an integer" on the screen, even when
$int is clearly not. As I mentioned, ctype_digit() fits the bill nicely:

<?php

if (ctype_digit($int))
{
echo '$int is an integer';
}

?>

You'll find that this does what you expect.

Hope that helps.

Chris

--
Chris Shiflett
Brain Bulb, The PHP Consultancy
http://brainbulb.com/

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