Are you using the == operator or === ?
maybe that's the problem
the function could return false or 0. You need to use the === operator
if( false !== ( $value = filter_var($value, FILTER_VALIDATE_INT)))
{
echo 'I need an Integer';
exit;
}
echo 'Thanks for the Int';
On Wed, Oct 7, 2009 at 2:13 PM, Ben Dunlap <bdunlap@xxxxxxxxxxxxxxxxxx>wrote:
> > Also, I think you're getting confused over the zero with exactly what
> > you are asking PHP to do. filter_var() returns true if the filter
> > matches. If the 0 match is returned as a false, then filter_var() will
>
> filter_var() actually returns the filtered data if the filter matches,
> and FALSE if it doesn't. That's the whole point of the filter_XXX
> functions; to pass a tainted value through a filter and get a clean,
> "safe" value out the other end:
>
> $tainted = get_user_input();
> $clean = filter_var($tainted, [FILTER_CONSTANT]);
> // now use $clean and never touch $tainted again
>
> From the original code above, it looks like the OP was
> misunderstanding the use of filter_var() and expecting it to return a
> boolean.
>
> Ben
>
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Martin Scotta
