function query($sql) {
    $dbc = new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME, DB_USER, DB_PASS);
    $dbc->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
    $args = func_get_args();
    $sta = $dbc->prepare($sql);
    array_shift($args);
    while(!empty($args)) {
        foreach($args as $key => $value) {
            $sta->bindParam(++$key, $value);
        }
    }
    $result = $sta->execute();
    $dbc = null;
    return $result;
}