Isset

[Anon]

<?php if (isset($year))
{
if (is_int($year))
{
echo ($year);
}
else
{
echo("You have entered a(n) " . (gettype($year)). ". You need to enter an integer.");
}
}
else
{
echo ("You have entered a year.");
}

?>

When I enter nothing into my form variable I still get the echo in the nested if instead of the last echo...I don't know why.

[vsego]

Because all form variables get passed to the script. If you typed nothing, than it is an empty string, but is set. Your (first) condition should be:

if ($year != "")...

or, prettier:

if ($year == "")
echo ("You have entered a year.");
else
if (is_int($year))
echo ($year);
else
echo("You have entered a(n) " . (gettype($year)). ". You need to enter an integer.");
}