分类添加关键词描述

配合@唐朝标题优化插件使用效果更加；

模板header.php中加入以下代码，需局部修改

{if $type=='index'&&$page=='1'}
    <meta name="keywords" con\="{$zbp->Config('mizhe')->keyword}" />
    <meta name="description" con\="{$zbp->Config('mizhe')->description}"/>
{else}
{php}
        if($type=='category'){
                $keywords = $category->Name;
                $description = $category->Intro;
        }elseif($type=='article'||$type=='page'){
                $aryTags = array();
                foreach($article->Tags as $key){
                        $aryTags[] = $key->Name;
                }
                if(count($aryTags)>0) $keywords = implode(',',$aryTags);
                $description = preg_replace('/[\r\n\s]+/', '', trim(SubStrUTF8(TransferHTML($article->Content,'[nohtml]'),100)).'...');
        }
{/php}
{if isset($keywords)&&strlen($keywords)>0}
    <meta name="keywords" con\="{$keywords}" />
{/if}
{if isset($description)&&strlen($description)>0}
    <meta name="description" con\="{$description}" />
{/if}
{/if}