套程序三级栏目不显示

CMS显示二级栏目

显示二级栏目列表通常使用 foreach 循环顶级栏目菜单，判断是否有子栏目（二级栏目），有则继续循环输出

    三级栏目按照逻辑来说 以此类推是可以的

显示二级栏目：

<ul class="snv a">
	{foreach $classtypedata as $v}
	{if($v['isshow']==1)}
	{if($v[pid]==0)}
	<li>
	     <div class="con">
			<a href="{$v[url]}" class="tit">{$v['classname']}</a>
			{if($v[haschild])}
			<ul class="subsnv">
				{foreach $v['children']['list'] as $vv}
				{if($vv['isshow']==1)}
				<li>
					<div class="con">
						<a href="{$vv[url]}" class="tit">{$vv['classname']}</a>
					</div>
				</li>
				{/if}
				{/foreach}
			</ul>
			{/if}
		</div>
	</li>
	
	{/if}
	{/if}
	{/foreach}
</ul>

以此类推即可显示三级栏目

显示三级栏目：

<ul class="snv a">
	{foreach $classtypedata as $v}
	{if($v['isshow']==1)}
	{if($v[pid]==0)}
	<li>
	     <div class="con">
			<a href="{$v[url]}" class="tit">{$v['classname']}</a>
			{if($v[haschild])}
			<ul class="subsnv">
            {foreach $v['children']['list'] as $vv}
                        {if($vv['isshow']==1)}
                            <li>
                            	<div class="con">
                            		<a href="{$vv[url]}" class="tit">{$vv['classname']}</a>
                            		{if($vv[haschild])}
                            		<ul class="subsnv smsub">
                            			{foreach $vv['children']['list'] as $vvv}
                            			{if($vvv['isshow']==1)}
                            			<li>
                            				<div class="con">
                            					<a href="{$vvv['url']}" class="tit">{$vvv['classname']}</a>
                            				</div>
                            			</li>
                            			{/if}
                            			{/foreach}
                            		</ul>
                            		{/if}
                            	</div>
                            </li>
                        {/if}
                        {/foreach}
                        </ul>
			{/if}
		</div>
	</li>
	
	{/if}
	{/if}
	{/foreach}
</ul>

但是此处会出现问题：

{$vv['children']['list']}     没有内容（为空）显示不出来数据

解决方案：

$vv['children']['list']

改为 ↓↓↓↓

$classtypedata [$vv['id']]['children']['list']

原因：

之所以三级以上children 没有数据，是因为三级以上很多栏目会给这个递归带来很大的数据压力

完整代码 :

<ul class="snv a">
	{foreach $classtypedata as $v}
	{if($v['isshow']==1)}
	{if($v[pid]==0)}
	<li>
	    <div class="con">
			<a href="{$v[url]}" class="tit">{$v['classname']}</a>
			{if($v[haschild])}
			<ul class="subsnv">
				{foreach $v['children']['list'] as $vv}
				{if($vv['isshow']==1)}
				<li>
					<div class="con">
						<a href="{$vv[url]}" class="tit">{$vv['classname']}</a>
						{if($vv[haschild])}
						<ul class="subsnv smsub">
							{foreach $classtypedata [$vv['id']]['children']['list'] as $vvv}
							{if($vvv['isshow']==1)}
							<li>
								<div class="con">
									<a href="{$vvv['url']}" class="tit">{$vvv['classname']}</a>
								</div>
							</li>
							{/if}
							{/foreach}
						</ul>
						{/if}
					</div>
				</li>
				{/if}
				{/foreach}
			</ul>
			{/if}
		</div>
	</li>
	
	{/if}
	{/if}
	{/foreach}
</ul>