if ($fname == "") 
echo "Name is Required !";
elseif ($fcolumn == "")
echo "Column is Required !";
elseif ($fsystem == "")
echo "System is Required !";
elseif ($ffeature == "")
echo "Feature is Required !";
else {

if (!$fname || !$fcolumn || !$fsystem || !$ffeature )
{
  echo "<script>alert(\"Feature is required...\");history.go(-1)</script>";
  exit;
}