phpcms文章也关键词调用数量限制-if控制关键词限制个数

if用法：

{php $num='1';}
{loop $data $r}
{if $num<='5'}

关键词：{$r['字段名']}

{/if}
{php $num++;}
{/loop}

=========================关键词个数限制：=========================

{php $num='1';}
{loop $keywords $keyword}
{if $num<='5'}
{pc:get sql="SELECT * FROM v9_keyword where keyword = '$keyword' " return="datatag"}{loop $datatag $r}
{if $r[pinyin]}
<a href="{siteurl($siteid)}/hot/{$r[pinyin]}.html" class="blue">{$r[keyword]}</a>
{/if}
{/loop}{/pc}
{if $num<'5'},{/if}
{/if}
{php $num++;}
{/loop}

====案例=======文章关键词======

<meta name="keywords" content="{php $num='1';}
{loop $keywords $keyword}
{if $num<='5'}
{pc:get sql="SELECT * FROM v9_keyword where keyword = '$keyword' " return="datatag"}{loop $datatag $r}
{if $r[pinyin]}
{$r[keyword]}
{/if}
{/loop}{/pc}
{if $num<'5'},{/if}
{/if}
{php $num++;}
{/loop}">