嘿，你可能会很幸运prior plugin I wrote (here\'s the code itself). 这是一个重定向插件，它可以查看传入的URL，如果要生成404，则根据Posteta表进行检查，如果找到匹配项，则重定向用户。

如果将整个URI存储在帖子的自定义字段中，它可能看起来像：

/**
 * Redirect old Tumblr URLs to new WP if the URI exists in the database
 */
function tumblr_legacy_redirect() {
    global $wpdb; // We\'re going to use this for the db lookup

    // Only run this lookup on URLs that are going to 404 anyway
    if ( is_404() ) {

        // We\'re getting the incorrect URI in hopes that it\'s an old Tumblr link
        $requested_url = $_SERVER[\'SERVER_NAME\'] . $_SERVER[\'REQUEST_URI\'];

        // Prepare the query so we protect ourselves against bad SQL queries
        $query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key=\'syndication_permalink\' AND meta_value=\'%s\'", $requested_url );
        $post_id = $wpdb->get_results( $query, \'ARRAY_N\' );
        // Catch if there are duplicate results in the database
        $post_id = $post_id[0][0];

        // Build the redirect if the post_id exists
        if ( $new_url = get_permalink( $post_id ) ) {
            wp_redirect( $new_url, 301 );
        } else {
            return;
        }

   } // END - if ( is_404() )

} // END - tumblr_legacy_redirect()

// A good place for our template redirect to hook into
add_action( \'template_redirect\', \'tumblr_legacy_redirect\' );