以下代码判断导航栏是否含有子栏目

{dede:field name=typeid runphp="yes"}
    global $dsql; $sql = "SELECT id From `dme_arctype` WHERE reid=‘@me‘ And ishidden<>1 order by sortrank asc limit 0, 100 ";
    $row = $dsql->GetOne($sql);
    $res = is_array($row)?‘<div class="navCMC-slide"><div class="navCMC-slide-container"><ul class="navCMC-cat2">‘:‘‘;
    @me=$res;
{/dede:field}

{dede:channel type=‘sun‘ sanji=‘1‘ noself=‘yes‘}
    <li class="navCMC-cat2-title col-md-3">
        <a href="[field:typelink/]">[field:typename/]</a>
            <ul>
                {dede:arclist row=‘3‘ titlelen=‘14‘}
                <li>
                    <a href="{field:arcurl/}">{field:title/}</a>
                </li>
                {/dede:arclist}
            </ul>
    </li>
{/dede:channel}

{dede:field name=typeid runphp="yes"}
    global $dsql; $sql = "SELECT id From `dme_arctype` WHERE reid=‘@me‘ And ishidden<>1 order by sortrank asc limit 0, 100 ";
    $row = $dsql->GetOne($sql);
    $res=is_array($row)?‘</ul></div></div>‘:‘‘;
    @me=$res;
{/dede:field}

{dede:channel type=‘son‘ noself=‘yes‘}关闭无子栏目时取同级栏目

原文地址：https://www.cnblogs.com/victorlyw/p/9581867.html