How to implement practical paging class through php

<table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
        <td>地区代号</td>
        <td>地区名称</td>
        <td>父级代号</td>
    </tr>

    <?php
    include("LZY.class.php");
    $db = new LZY();
    include("page.class.php");

    //查总条数
    $sz = "select count(*) from chinastates";
    $az = $db->Query($sz);

    //1.造对象
    $page = new Page($az[0][0],10);

    //2.将分页类的limit变量拼接在SQL语句后面
    $sql = "select * from chinastates ".$page->limit;

    $arr = $db->Query($sql);

    foreach($arr as $v)
    {
        echo "<tr>
       <td>{$v[0]}</td>
        <td>{$v[1]}</td>
        <td>{$v[2]}</td>
    </tr>";
    }
    ?>

</table>

<?php
//3.输出分页信息
echo $page->fpage();
?>
</body>