Uncaught PDOException: SQLSTATE[42S22]: Column not found:
$db = get_PDO();
for ($i = 0; $i < count($names); $i++) {
$sql = "INSERT INTO presidents(name, year, vice_president) "
. "VALUES (:name, :year, :vice_president);";
$stmt = $db->prepare($sql);
$params = array("name" => $names[$i],
"year" => $year[$i],
"vice_president" => $vice_president[$i],);
$stmt->execute($params);
}