Can't POST a value of zero?

[digitalDaze]

I was making a poll and found that I could not post a value of 0.
Does that make sense?
Just curious.

<form name="survey" method="POST" action="<? echo $_SERVER['PHP_SELF'] ?>">
<label><input type="radio" name="sel" value="0">Value 0</label><br>
<label><input type="radio" name="sel" value="1">Value 1</label><br>
<input type="submit" name="Survey" value="Vote">
</form>

<?
if(!empty($POST['sel'])){
echo $POST['sel'];}
?>

[RonR]

No it doesn't make sense... are you sure a radiobutton is selected when clicking the submit button?

[Weedpacket]

[man]empty[/man]
empty() returns FALSE if var has a non-empty or non-zero value. In otherwords, "", 0, "0", NULL, FALSE, array(), var $var;, and objects with empty properties, are all considered empty. TRUE is returned if var is empty.
...
See also: [man]isset[/man].

[digitalDaze]

I see now, the problem is not that I can't POST 0, it's that !empty() returns false when it sees the zero value.
Thanks for the help.