wordpress修改固定链接设置后旧链接301重定向到新链接的办法

以前网站固定链接结构是这样设置的：/archives/%post_id%,想修改成这样：/archives/%year%/%monthnum%/%post_id%.html,但是网站已经被搜寻引擎收录了好多,以前的地址都无访问了,所以要做好301重定向,跳转到新的固定链接所生成的地址中去：

<br />
$rewrite_config = array();<br />
$rewrite_config['highpriority'] = true ;<br />
$rewrite_config['rewrite'] = array();<br />
$rewrite_config['oldstructure'] = "/archives/%post_id%";</p>
<p>function wpdaxue_pm_the_posts($post) {<br />
    global $wp;<br />
    global $wp_rewrite;<br />
    global $rewrite_config;</p>
<p>    $rewrite_config['rewrite'] = $wp_rewrite->generate_rewrite_rule($rewrite_config['oldstructure'], false, true, true, true);<br />
    if ($post != NULL && is_single() && $rewrite_config['oldstructure'] != $wp_rewrite->permalink_structure) {<br />
        if (array_key_exists($wp->matched_rule, $rewrite_config['rewrite'])) {<br />
        // ok, we need to generate a 301 Permanent redirect here.<br />
            header("HTTP/1.1 301 Moved Permanently", TRUE, 301);<br />
            header('Status: 301 Moved Permanently');<br />
            $permalink = get_permalink($post[0]->ID);<br />
            if (is_feed()) {<br />
                $permalink = trailingslashit($permalink) . 'feed/';<br />
            }<br />
            header("Location: ". $permalink);<br />
            exit();<br />
        }<br />
    }<br />
    return $post;<br />
}</p>
<p>function wpdaxue_pm_post_rewrite_rules($rules) {<br />
    global $wp_rewrite;<br />
    global $rewrite_config;<br />
    $oldstruct = $rewrite_config['oldstructure'];</p>
<p>    if ($oldstruct != NULL && $oldstruct != $wp_rewrite->permalink_structure) {<br />
        $rewrite_config['rewrite'] = $wp_rewrite->generate_rewrite_rule($oldstruct, false, true, true, true);<br />
        if ($rewrite_config ['highpriority'] == true) {<br />
            return array_merge($rewrite_config['rewrite'], $rules);<br />
        } else {<br />
            return array_merge($rules, $rewrite_config['rewrite']);<br />
        }<br />
    }<br />
    return $rules;<br />
}<br />
add_filter('the_posts', 'wpdaxue_pm_the_posts', 20);<br />
add_filter('post_rewrite_rules', 'wpdaxue_pm_post_rewrite_rules');<br />


先将上面的代码（要将$rewrite_config['oldstructure'] = "/archives/%post_id%";改成你自己的）放到主题的function.php中，再设置好新的固定链接结构就可以了。