点击PHP按钮加载更多MYSQL结果

我有一个数据表，我只想加载前5个条目，底部的按钮将加载条目6到11。我尝试了一些添加按钮的变体，但它没有显示正确的条目，此时按钮只会再次显示相同的条目。这是代码部分；

    if ($stmt = $mysqli->prepare("SELECT * FROM memo Where uid = ? ORDER BY id DESC LIMIT 5")) {
        $stmt->bind_param("i", $uid2);
        $stmt->execute();
        $stmt->bind_result($id, $note, $uid3);
    }
    $output   = array();
    $out_id   = array();
    $out_note = array();
    $i = 0;
    if(isset($_POST['submit'])){
        ("SELECT * FROM memo Where uid = ? ORDER BY id DESC LIMIT 6, 11");
        $stmt->bind_param("i", $uid2);
        $stmt->execute();
        $stmt->bind_result($id, $note, $uid3);
    }
    while ($stmt->fetch()) {
        $out_note[$i] = $note;
        echo $out_note[$i] . " <br>";
        $i++;
    }
    $output = array(
        $out_note,
        $out_id
    );
    rsort($output);
    $stmt->close();
    $mysqli->close();
    ?>
    <form action='' method='POST'>
        <input type='submit' name='submit' />
    </form>