PHP查询分页的实现方法

<!-- DataTables CSS -->
<link rel="stylesheet" type="text/css" href="http://cdn.datatables.net/1.10.15/css/jquery.dataTables.css">

<!-- jQuery -->
<script type="text/javascript" charset="utf8" src="http://code.jquery.com/jquery-1.10.2.min.js"></script>

<!-- DataTables -->
<script type="text/javascript" charset="utf8" src="http://cdn.datatables.net/1.10.15/js/jquery.dataTables.js"></script>

<table id="table_id_example" class="display">
   <thead>
   <tr>
      <th>ID</th>
      <th>发布时间</th>
      <th>发布IP</th>
      <th>公告内容</th>
   </tr>
   </thead>
   <tbody>
      <volist name="notice" id="vo">
         <tr>
            <td>{$vo.id}</td>
            <td>{$vo.create_time}</td>
            <td>{$vo.create_ip}</td>
            <td>{$vo.notice_content}</td>
         </tr>
      </volist>
   </tbody>
</table>

<script>
    $(document).ready( function () {
        $('#table_id_example').DataTable();
    } );
   </script>

ublic function gonggaochakan(){
    /* 公告查看
     */
    $dbNotice = M('notice');//实例化dbNotice对象
    $count      = $dbNotice->count();// 查询满足要求的总记录数
    $Page       = new \Think\Page($count,$count);// 实例化分页类 传入总记录数和每页显示的记录数(全部记录)
    $data = $dbNotice->order('create_time')->limit($Page->firstRow.','.$Page->listRows)->select();//获得所有记录
    $this->assign('notice',$data);//传给模板
    $this->show();
}