$stmt=$my_db->prepare("SELECT isodd(?)") or die($my_db->error);
$stmt->bind_param('i',$aNumber) or die($stmt->error);
$stmt->execute() or die($stmt->error);
$stmt->bind_result($isodd);
$stmt->fetch();
if ($isodd == 1 )
printf("%d is an odd number\n",$aNumber);
else
printf("%d is an even number\n",$aNumber);