WordPress高效的SEO优化方法，非插件，适用于英文站

WordPress有很多SEO插件来帮助进行搜索引擎优化。如果你不想使用插件，下面这个高效的代码，将使你的博客对搜索引擎更加友好。

将下面代码粘贴到你的functions.php文件：

function basic_wp_seo() {
    global $page, $paged, $post;
    $default_keywords = 'wordpress, plugins, themes, design, dev, development, security, htaccess, apache, php, sql, html, css, jquery, javascript, tutorials'; // customize
    $output = '';
    // description
    $seo_desc = get_post_meta($post->ID, 'mm_seo_desc', true);
    $description = get_bloginfo('description', 'display');
    $pagedata = get_post($post->ID);
    if (is_singular()) {
        if (!empty($seo_desc)) {
            $content = $seo_desc;
        } else if (!empty($pagedata)) {
            $content = apply_filters('the_excerpt_rss', $pagedata->post_content);
            $content = substr(trim(strip_tags($content)), 0, 155);
            $content = preg_replace('#n#', ' ', $content);
            $content = preg_replace('#s{2,}#', ' ', $content);
            $content = trim($content);
        } 
    } else {
        $content = $description;    
    }
    $output .= '<meta name="description" content="' . esc_attr($content) . '">' . "n";
    // keywords
    $keys = get_post_meta($post->ID, 'mm_seo_keywords', true);
    $cats = get_the_category();
    $tags = get_the_tags();
    if (empty($keys)) {
        if (!empty($cats)) foreach($cats as $cat) $keys .= $cat->name . ', ';
        if (!empty($tags)) foreach($tags as $tag) $keys .= $tag->name . ', ';
        $keys .= $default_keywords;
    }
    $output .= "tt" . '<meta name="keywords" content="' . esc_attr($keys) . '">' . "n";
    // robots
    if (is_category() || is_tag()) {
        $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
        if ($paged > 1) {
            $output .=  "tt" . '<meta name="robots" content="noindex,follow">' . "n";
        } else {
            $output .=  "tt" . '<meta name="robots" content="index,follow">' . "n";
        }
    } else if (is_home() || is_singular()) {
        $output .=  "tt" . '<meta name="robots" content="index,follow">' . "n";
    } else {
        $output .= "tt" . '<meta name="robots" content="noindex,follow">' . "n";
    }
    // title
    $title_custom = get_post_meta($post->ID, 'mm_seo_title', true);
    $url = ltrim(esc_url($_SERVER['REQUEST_URI']), '/');
    $name = get_bloginfo('name', 'display');
    $title = trim(wp_title('', false));
    $cat = single_cat_title('', false);
    $tag = single_tag_title('', false);
    $search = get_search_query();
    if (!empty($title_custom)) $title = $title_custom;
    if ($paged >= 2 || $page >= 2) $page_number = ' | ' . sprintf('Page %s', max($paged, $page));
    else $page_number = '';
    if (is_home() || is_front_page()) $seo_title = $name . ' | ' . $description;
    elseif (is_singular())            $seo_title = $title . ' | ' . $name;
    elseif (is_tag())                 $seo_title = 'Tag Archive: ' . $tag . ' | ' . $name;
    elseif (is_category())            $seo_title = 'Category Archive: ' . $cat . ' | ' . $name;
    elseif (is_archive())             $seo_title = 'Archive: ' . $title . ' | ' . $name;
    elseif (is_search())              $seo_title = 'Search: ' . $search . ' | ' . $name;
    elseif (is_404())                 $seo_title = '404 - Not Found: ' . $url . ' | ' . $name;
    else                              $seo_title = $name . ' | ' . $description;
    $output .= "tt" . '<title>' . esc_attr($seo_title . $page_number) . '</title>' . "n";
    return $output;
}

需修改一下$default_keywords 后面默认的关键字

使用方法：用下面代码：

<?php echo basic_wp_seo(); ?>

替换主题header.php模板

<title></title>  

注：可能不同的主题有所区别

可惜这段SEO代码对中文支持不好

原文地址：www.5che2.com