实现PHP搜索加分页

$wherelist=array();$urlist=array();if(!empty($_GET['title'])){$wherelist[]=" title like '%".$_GET['title']."%'";$urllist[]="title=".$_GET['title']; }if(!empty($_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 $_GET['author']?>" size="8"> <input type="button" value="查看全部" onclick="window.location='searchpage.php'"> <input type="submit" value="搜索"></form> <table border="1" width="1000" align="center"> <tr> <td>编号</td> <td>标题</td> <td>关键字</td> <td>作者</td> <td>日期</td> <td>内容</td> </tr><?php while($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 " <a href='searchpage.php?page=1{$url}'>首页</a> ";echo "<a href='searchpage.php?page=".($page-1)."{$url}'>上一页</a>";echo "<a href='searchpage.php?page=".($page+1)."{$url}'>下一页</a>";echo " <a href='searchpage.php?page={$maxpage}{$url}'>尾页</a> "; ?></td> </tr></table>