PHP SMARTY 双循环(递归)输出分类 有关问题

PHP SMARTY 双循环(递归)输出分类 问题
模版

PHP code

{foreach from=$classlist item=newsclass}    
{$newsclass.classname}
{/foreach}

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程序

PHP code

$sql = "select * from jh_newsclass where parentid = 0";$result = $mysqli->query($sql);while ($row = $result->fetch_row()) {    $classlist[] = array(        'id'=>$row[0],        'classname'=>$row[2],        'parentid'=>$row[1],        'ispro'=>$row[3],            );}$result->close();$mysqli->close();$smarty->assign('classlist',$classlist);$smarty->assign('webname',Webname);$smarty->display('admin/left.htm');

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这样只能输出一级分类. 我需要在一级分类下再输出二级..三级..该怎么写呀?


以前用ASP输出的效果

HTML code

              
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原来的ASP代码

HTML code

    
              
        
")        while not showparentclassrs.eof            response.Write"
"            set temprs = conn.execute("select * from Jh_newsclass where parentid = " & showparentclassrs("id"))            if temprs.eof and temprs.bof then                response.Write""            else                response.Write astr & tree & "" & showparentclassrs("classname")            end if            set temprs = nothing            response.Write"
"            call showparentclass(astr,tree&"--",showparentclassrs("id"))        showparentclassrs.movenext        wend    response.Write("

") end ifend sub%>