zf框架db类的分页示例分享

<?php
isset($_get['page']) ? $page = $_get['page'] : $page = 1;
//引入loader类(自动加载类)
require_once("zend/loader.php");
//使用loader类引入一个db类
zend_loader::loadclass("zend_db");
//引入zend_db的状态器
zend_loader::loadclass("zend_db_statement_pdo");
//配置数据库连接信息
$config = array('host' => '127.0.0.1' ,
    'username' => 'root' ,
    'password' => '111' ,
    'dbname' => 'test',
    'profiler' => "true"
    );
//告诉zend_db类所操作的数据库和数据库配置信息
$db = zend_db::factory('pdo_mysql' , $config);
//执行编码语句
$db -> query("set names utf8");
//-----------------------------------------------
//使用fetchone()方法得出表的总条数
$total = $db -> fetchone("select count(*) from gongsi");
//定义每页显示条数
$b = 50;
//得出总页数
$a = ceil($total/$b);

//-----接下来为一系列的查询表、取结果集、分页等操作
$select = $db ->select();
$select -> from('sanguo',array('s_sheng as 省份','sum(s_gongzi) as 总工资','min(s_gongzi) as 最低工资','max(s_gongzi) as 最高工资','avg(s_gongzi) as 平均工资'));
// $select -> where('s_gongzi>=3000');
// $select -> where("s_sheng='河北'");
// $select -> order('s_sheng asc');
// $select -> order('s_gongzi desc');
$select -> group('s_sheng');  //分组
//$select -> having('最高工资>10000');  //附加条件
$select -> order('最高工资 desc');  //排序
$select -> limit(0,0); //截取
$select -> limitpage($page, $b); //分页
/*sql语句相当于：
select s_sheng as 省份,sum(s_gongzi) as 最高工资 from sanguo group by s_sheng having 最高工资>10000 order by 最高工资 desc limit 0,10;
*/
$result = $db->fetchall($select);

echo "<table border='1' align='center' width='960' style='text-align:center'>";
echo "<tr><th>省份</th><th>总工资</th><th>最低工资</th><th>最高工资</th><th>平均工资</th></tr>";
foreach ($result as $key => $value)
{
 echo "<tr>";
 foreach ($value as $key2 => $value2)
 {
  echo "<td>" . $value2 . "</td>";
 }
 echo "</tr>";
}
echo "<tr>";
echo "<td colspan='5'>";
echo "<a href=?page=1>首页</a>  ";
if ($page>1)
{
 echo "<a href=?page=". ($page-1) .">上页</a>  ";
}
for ($i=1; $i <=15 ; $i++)
{
 echo "<a href=?page=$i>".$i."</a>  ";
}
if ($page<$total)
{
 echo "<a href=?page=". ($page+1) .">下页</a>  ";
}
echo "<a href=?page=" . $a .">末页</a>";
echo "</td>";
echo "</tr>";
echo "</table>";
?>