PbootCMS常用if判断语句，持续更新…

①.导航高亮

{pboot:if('[nav:scode]'=='{sort:tcode}')}class="active"{/pboot:if} //用于非首页

例：

{pboot:nav} 
<li {pboot:if('[nav:scode]'=='{sort:tcode}')}class="active"{/pboot:if}><a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >[nav:name]</a></li>
{/pboot:nav}
{pboot:if(0=='{sort:scode}')}class="active"{/pboot:if} //用于首页

例：

<li {pboot:if(0=='{sort:scode}')}class="active"{/pboot:if}><a href="/" rel="external nofollow" >首页</a></li>

②. 判断有无子菜单

{pboot:if([nav:soncount]>0)}...{/pboot:if}

例 1：

{pboot:nav} 
<li><a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >[nav:name]</a> <!--一级菜单循环-->{pboot:if([nav:soncount]>0)}  <!--当有子菜单时显示div--><div>{pboot:2nav parent=[nav:scode]}<a href="[2nav:link]" rel="external nofollow" >[2nav:name]</a> <!--二级菜单循环-->{/pboot:2nav}</div>{/pboot:if}</li>{/pboot:nav}

例 2：

{pboot:nav} 
<li><a {pboot:if([nav:soncount]>0)} href="javascript:;" rel="external nofollow"  {else} href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  {/pboot:if}>[nav:name]</a></li>  <!--无子菜单时显示正常链接，有子菜单时为空连接，用于手机端点击菜单滑出子菜单情况。-->{/pboot:nav}

③. 内页子菜单高亮

{pboot:if('[nav:scode]'=='{sort:scode}')}class="active"{/pboot:if}

例：

{pboot:nav parent={sort:tcode}}
<li {pboot:if('[nav:scode]'=='{sort:scode}')}class="active"{/pboot:if}><a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >[nav:name]</a></li>
{/pboot:nav}

4. 判断标签为空时不显示

{pboot:if('{pboot:companyqq}'!='')}QQ：{pboot:companyqq}{/pboot:if}  <!--同理也可用在文章详情页-->

5. 判断列表页有无内容，无内容返回提示

{pboot:if({page:rows}>0)}{page:bar}{else}暂无内容{/pboot:if}

例：

{pboot:if({page:rows}>0)}<div class="page">         <a href="{page:index}" rel="external nofollow"  rel="external nofollow" >首页</a><a href="{page:pre}" rel="external nofollow"  rel="external nofollow" >上一页</a>{page:numbar}<a href="{page:next}" rel="external nofollow"  rel="external nofollow" >下一页</a><a href="{page:last}" rel="external nofollow"  rel="external nofollow" >尾页</a></div>{else}<div class="page">暂无内容</div>{/pboot:if}

⑥. 分页判断进阶，在第一页时隐藏首页和上一页按钮，在最后一页时隐藏下一页和尾页按钮。

{pboot:if({page:rows}>0)}<div class="page"><a href="{page:index}" rel="external nofollow"  rel="external nofollow" {pboot:2if('{page:current}'==1)}class="hide"{/pboot:2if}>首页</a>  <!--在第一页时，当前页码‘{page:current}’等于1，添加‘hide’样式，.hide{dispaly:none;}--><a href="{page:pre}" rel="external nofollow"  rel="external nofollow" {pboot:2if('{page:current}'==1)}class="hide"{/pboot:2if}>上一页</a>  <!--与上条同理-->{page:numbar}<a href="{page:next}" rel="external nofollow"  rel="external nofollow" {pboot:2if('{page:current}'=='{page:count}')}class="hide"{/pboot:2if}>下一页</a>  <!--在最后一页时，当前页码‘{page:current}’等于总页数‘{page:count}，’添加‘hide’样式，.hide{dispaly:none;}--><a href="{page:last}" rel="external nofollow"  rel="external nofollow" {pboot:2if('{page:current}'=='{page:count}')}class="hide"{/pboot:2if}>尾页</a><!--与上条同理--></div>{else}<div class="page">暂无内容</div>{/pboot:if}

7.判断第一个循环项，并添加 class（常用于 banner 和 Tab 选项卡）

{pboot:if('[xx:i]'=='1')}class="active"{/pboot:if}

例：

<!--第一个菜单添加 class="active"-->{pboot:nav}<a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  {pboot:if('[nav:i]'=='1')}class="active"{/pboot:if}>[nav:name]</a>{/pboot:nav}<!--第一条文章添加 class="active"-->{pboot:list}<a href= "[list:link]" {pboot:if('[list:i]'=='1')}class="active"{/pboot:if}>[list:title]</a>{/pboot:list}<!--第一个轮播图添加 class="active"-->{pboot:slide gid=* num=*}<img src="[slide:src]" {pboot:if('[slide:i]'=='1')}class="active"{/pboot:if}>{/pboot:slide}<!--以上具体 [xx:i] 用法请参考官方手册，也可以用 jq 的选择器 + addclass-->

⑧.内容页判断有无多图，无多图显示缩略图

{pboot:if({content:ispics}==1)}..多图..{else}..缩略图..{/pboot:if}

例：

{pboot:if({content:ispics}==1)}<ul>{pboot:pics id={content:id} num=5}<li><img src="[pics:src]" /></li>  <!--多图循环-->{/pboot:pics}</ul>{else}<img src="{content:ico}" />  <!--缩略图-->{/pboot:if}

⑨.内容页判断列表中的当前文章高亮（右侧推荐文章中的其中一条，正好是当前打开的文章时）

{pboot:if('[list:link]'=='{content:link}')}class="active"{/pboot:if} //判断列表内链接等于本文链接

例：

<ul>
{pboot:list scode={sort:tcode} num=10 order='visits'}
<li {pboot:if('[list:link]'=='{content:link}')}class="active"{/pboot:if}><a href="[list:link]" rel="external nofollow"  rel="external nofollow" >[list:title]</a></li>
{/pboot:list}
</ul>

⑩.奇偶数判断（隔行变色）

{pboot:if([list:i]%2==0)}...{/pboot:if}

例：

<ul>{pboot:list num=10}<li {pboot:if([list:i]%2==0)}class="bg-dark"{/pboot:if}><a href="[list:link]" rel="external nofollow"  rel="external nofollow" >[list:title]</a></li>  <!--等于0为偶数，等于1为奇数  .bg-dark{background:#000;}-->{/pboot:list}</ul>

11.判断导航从第几个开始

{pboot:if('[nav:i]'>'2')}……{/pboot:if} //从第二个开始

例：

{pboot:nav} 
{pboot:if('[nav:i]'>'2')}
<li><a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >[nav:name]</a></li>
{/pboot:if}
{/pboot:nav}

12.隐藏指定 scode 的菜单

{pboot:if([nav:scode]==2||[nav:scode]==4||[nav:scode]==6)}style="display: none;"{/pboot:if} //隐藏 scode 为 2，4，6 的菜单

例：

{pboot:nav}           
<li {pboot:if([nav:scode]==2||[nav:scode]==4||[nav:scode]==6)}style="display: none;"{/pboot:if}><a href="[nav:link]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >[nav:name]</a></li>
{/pboot:nav}

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