Re: security/sql issues with php

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On Wed, 2005-09-21 at 19:21, Chris Shiflett wrote:
> 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:

Not if it's a float.

<?php

$int = '2.333';
$int += 0;

if (is_int($int))
{
    echo '$int is an integer';
}
else
{
    echo '$int is probably a float :)';
}

?>

Cheers,
Rob.
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