Pilih semua data dari fungsi Tabel Database MySQL

function selectDataFromTable($tableName, $where = '')
{
    global $db;
    $qry = "SELECT * FROM $tableName ";
    if ($where) {
        $qry .= ' WHERE ' . $where . ' ';
    }
    $information = $db->get_results("$qry");
    //var_dump($qry);
    if ($information)
        return $information;
    else
        return false;
}
Amin Arjmand