实现PHP搜索加分页

}
if(!empty($_GET['keywords']))
{
$wherelist[]=" keywords like '%".$_GET['keywords']."%'";
$urllist[]="keywords=".$_GET['keywords'];
}if(!empty($_GET['author']))
{
$wherelist[]=" author like '%".$_GET['author']."%'";
$urllist[]="author=".$_GET['author'];
}
$where="";
if(count($wherelist)>0)
{
$where=" where ".implode(' and ',$wherelist);
$url='&'.implode('&',$urllist);
}
//分页的实现原理
//1.获取数据表中总记录数
$sql="select count() from news $where ";
$result=mysql_query($sql);
$totalnum=mysql_num_rows($result);
//每页显示条数
$pagesize=5;
//总共有几页
$maxpage=ceil($totalnum/$pagesize);
$page=isset($_GET['page'])?$_GET['page']:1;
if($page <1)
{
$page=1;
}
if($page>$maxpage)
{
$page=$maxpage;
}
$limit=" limit ".($page-1)$pagesize.",$pagesize";
$sql1="select * from news {$where} {$limit}";

//$sql1="select * from news {$where} {$limit}";
$res=mysql_query($sql1);

?>
<form action="searchpage.php" method="get">
标题：<input type="text" name="title" value="<?php echo $_GET['title']?>" size="8">
关键字<input type="text" name="keywords" value="<?php echo $_GET['keywords']?>" size="8">
作者：<input type="text" name="author" value="<?php echo $_GET['author']?>" size="8">
<input type="button" value="查看全部" onclick="window.location='searchpage.php'">
<input type="submit" value="搜索">

<table border="1" width="1000" align="center">
<tr>
<td>编号</td>
<td>标题</td>
<td>关键字</td>
<td>作者</td>
<td>日期</td>
<td>内容</td>
</tr>
<?php while($row= mysql_fetch_assoc($res)){?>
<tr>
<td><?php echo $row['id'] ?></td>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['keywords'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo date("Y-m-d H:i:s",$row['addtime']) ?></td>
<td><?php echo $row['content'] ?></td>
</tr>
<?php }?>
<tr>
<td colspan="6">
<?php
echo " 当前{$page}/{$maxpage}页 共{$totalnum}条";
echo " 首页 ";
echo "上一页";
echo "下一页";
echo " 尾页 ";

?>
</td>
</tr>
</table>