用PHP+MYSQL实现论坛里的分级+分页显示
<? /*存放贴子的表结构------------------------------------------------------
create table bbsrow( bbsrow_id int(6) not null auto_increment, //贴子ID号 bbsrow_auth varchar(20) not null, //贴子作者 bbsrow_parentid int(6), //贴子的父亲贴子ID号,如为首发贴则为空 bbsrow_title varchar(200) not null, //贴子标题 bbsrow_returncount int(3), //贴子的回复贴数,如果没有回贴则为空 primary key (bbsrow_id) ); -----------------------------------------------------------------------------*/
//显示儿子贴的递归函数-------------------------------------------------- function showchildren($parent_id){ global $connect_id; $query="select * from bbsrow where bbsrow_parentid='" . $parent_id . "'"; $result_top=mysql_query($query,$connect_id); echo "<ul>n"; while($myrow_child=mysql_fetch_row($result_top)){ echo "<li>"; echo $myrow_child[0]; echo $myrow_child[1]; echo $myrow_child[2]; echo $myrow_child[3]; echo $myrow_child[4] . "n"; //如果回复贴数不为空,则表示有儿子贴,继续显示儿子贴 if($myrow_child[4]!=''){ showchildren($myrow_child[0]); } } echo "</ul>"; } //----------------------------------------------------------------------
//连接数据库并将所有首发贴放到$mainrow数组里----------------------------
$connect_id=mysql_connect("localhost","test","test") or die("无法连接数据库"); mysql_select_db("bbs") or die("无法选择数据库"); $query="select * from bbsrow where bbsrow_parentid=''"; $result=mysql_query($query,$connect_id);
$i=0; while($myrow=mysql_fetch_row($result)) { $mainrow[$i][0]=$myrow[0]; $mainrow[$i][1]=$myrow[1]; $mainrow[$i][2]=$myrow[2]; $mainrow[$i][3]=$myrow[3]; $mainrow[$i][4]=$myrow[4]; $i++; } mysql_free_result($result); //----------------------------------------------------------------------
//开始构建分页显示------------------------------------------------------
if($currentpage!=""){ $page=$currentpage; } else{ $page=0; }
$pagesize=10;//每页显示的首发贴数! $start=$page*$pagesize; $end=$start+$pagesize; if($end>$i) $end=$i; $totalpage=$i/$pagesize;
$info=" 共有" . $i . "条纪录,分" . ceil($totalpage) . "页,当前为第" . ($page+1) . "/" . ceil($totalpage) . "页 <br>n"; echo $info;
if($page>0) $pagestr="<a href=bbsrow.php4?currentpage=" . ($page-1) . ">上一页</a>"; $pagestr=$pagestr . " [第 "; for($i=0;$i<$totalpage;$i++){ if($i!=$page){ $pagestr=$pagestr . " <a href=bbsrow.php4?currentpage=" . $i . ">" . ($i+1) . "</a> "; } else{ $pagestr=$pagestr . " " . ($i+1) . " "; } }
$pagestr=$pagestr . "页]"; if($page<$totalpage-1) $pagestr=$pagestr . "<a href=bbsrow.php4?currentpage=" . ($page+1) .">下一页</a><p>n"; echo $pagestr; //----------------------------------------------------------------------
//开始分级显示----------------------------------------------------------
echo "<ul>n"; for($i=$start;$i<$end;$i++){ echo "<li>n"; echo $mainrow[$i][0]; echo $mainrow[$i][1]; echo $mainrow[$i][2]; echo $mainrow[$i][3]; echo $mainrow[$i][4] . "n"; //如果回复贴数不为空,则表示有儿子贴,继续显示儿子贴 if($mainrow[$i][4]!=''){ showchildren($mainrow[$i][0]); } } echo "</ul>n"; //----------------------------------------------------------------------?>
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