无插件，代码实现WordPress文章SEO

为WordPress博客文章添加文章SEO代码

前言

代码

//SEO
//自动关键词与描述
function get_cats_name() {
$allcats=get_categories();
foreach ($allcats as $category) 
{
$keywords[] = $category->cat_name;
}
return $keywords;
}
// utf8 substr
function utf8Substr($str, $from, $len) {
return preg_replace('#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$from.'}'.
'((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$len.'}).*#s',
'$1',$str);
}
// Meta SEO
function meta_SEO() {
global $post;
$output = '';
if (is_single()){//如果是文章页
$keywords = ''; 
$description = '';
if ($post->post_excerpt) {//如果文章摘要存在就以文章摘要为描述
$description = $post->post_excerpt;
$description = str_replace("rn","",$description);
$description = str_replace("n","",$description);
$description = str_replace(""","'",$description);
$description .= '...';
} else {//如果文章摘要不存在就截断文章前200字为描述
$description = utf8Substr(strip_tags($post->post_content),0,200);
$description = str_replace("rn","",$description);
$description = str_replace("n","",$description);
$description = str_replace(""","'",$description);
$description .= '...';
} 
$tags = wp_get_post_tags($post->ID);//取文章标签
foreach ($tags as $tag ) {
$keywordarray[] = $tag->name;
}
//以文章标签为关键字
$keywords = implode(',',array_unique((array)$keywordarray));
} else {//如果不是文章页
$keywords = '乐趣公园,贴吧动态,wordpress,系统操作,网络应用,软件,IT资讯,贴吧,火狐'; //在引号间写入你博客的关键字用,断开
$description = '关注贴吧动态，折腾火狐浏览器';//在引号间写入你博客的简单描述，不要过200字
}
//输出关键字
$output .= '<meta name="keywords" content="' . $keywords . '" />' . "n";
$output .= '<meta name="description" content="' . $description . '" />' . "n";
//输出描述
echo "$outputn";
}
add_action('wp_head', 'meta_SEO');//添加meta_SEO函数到头部信息里
add_filter( 'comment_text' , 'ludou_comment_add_at', 20, 2);

使用

将本段代码插入主题函数文件functions.php即可。

后语

-- 完 --