自动从其它站点RSS抓取文章
代码基本原理，新建一个自定义分类法“shot”，自动从另一个站点的RSS抓取文章，放在一个数组中，再用这个数组创建“shot”文章，并为文章添加自定义栏目image和link_url，方便调用缩略图和原文链接。
将下面代码添加到当前主题functions.php中即可。
- <?
- /* Post Type
- ———————————————————————————— */
- add_action( ‘init’, ‘register_cpt_shot’ );
- function register_cpt_shot() {
- $labels = array(
- ‘name’ => _x( ‘Dribble Shots’, ‘shot’ ),
- ‘singular_name’ => _x( ‘Dribbble Shot’, ‘shot’ ),
- ‘add_new’ => _x( ‘Add New’, ‘shot’ ),
- ‘add_new_item’ => _x( ‘Add New Dribbble Shot’, ‘shot’ ),
- ‘edit_item’ => _x( ‘Edit Dribbble Shot’, ‘shot’ ),
- ‘new_item’ => _x( ‘New Dribbble Shot’, ‘shot’ ),
- ‘view_item’ => _x( ‘View Dribbble Shot’, ‘shot’ ),
- ‘search_items’ => _x( ‘Search Dribble Shots’, ‘shot’ ),
- ‘not_found’ => _x( ‘No dribble shots found’, ‘shot’ ),
- ‘not_found_in_trash’ => _x( ‘No dribble shots found in Trash’, ‘shot’ ),
- ‘parent_item_colon’ => _x( ‘Parent Dribbble Shot:’, ‘shot’ ),
- ‘menu_name’ => _x( ‘Dribble Shots’, ‘shot’ ),
- );
- $args = array(
- ‘labels’ => $labels,
- ‘hierarchical’ => false,
- ‘supports’ => array( ‘title’, ‘custom-fields’ ),
- ‘public‘ => true,
- ‘show_ui’ => true,
- ‘show_in_menu’ => true,
- ‘show_in_nav_menus’ => false,
- ‘publicly_queryable’ => true,
- ‘exclude_from_search’ => false,
- ‘has_archive’ => true,
- ‘query_var’ => true,
- ‘can_export’ => true,
- ‘rewrite’ => true,
- ‘capability_type’ => ‘post’
- );
- register_post_type( ‘shot’, $args );
- }
- /* Import Shots via RSS
- ———————————————————————————— */
- // grab the image src from teh description
- function get_image($string) {
- preg_match_all(‘/<img[^>]+>/i’,$string, $result);
- $img = array();
- foreach( $result[0] as $img_tag)
- {
- preg_match_all(‘/(src)=(“[^”]*“)/i’,$img_tag, $img[$img_tag]);
- }
- return trim($img[$img_tag][2][0], ‘”‘);
- }
- // create an array of the feed items
- include_once(ABSPATH . WPINC . ‘/feed.php’);
- $feed = fetch_feed(‘http://dribbble.com/tammyhart/shots.rss’);
- $feed = $feed->get_items(0);
- $shots = array();
- foreach ( $feed as $item ) :
- $shots[$item->get_date(‘Ymd’)] = array(
- ‘id’ => $item->get_date(‘Ymd’),
- ‘url’ => esc_url( $item->get_permalink() ),
- ‘date‘ => $item->get_date(‘Y-m-d H:i:s’),
- ‘title’ => esc_html( $item->get_title() ),
- ‘image’ => get_image($item->get_description())
- );
- endforeach;
- // create posts from our array
- foreach ($shots as $shot) {
- $shot_post = array(
- ‘post_type’ => ‘shot’,
- ‘post_status’ => ‘publish’,
- ‘post_author’ => 1,
- ‘post_title’ => $shot[‘title’],
- ‘post_date’ => $shot[‘date‘]
- );
- $shot_post_meta = array(
- ‘link_url’ => $shot[‘url’],
- ‘image’ => $shot[‘image’]
- );
- $posts = get_posts(
- array(
- ‘post_type’ => ‘shot’,
- ‘meta_key’ => ‘link_url’,
- ‘meta_value’=> $shot_post_meta[‘link_url’]
- )
- );
- if (count($posts) == 0) {
- $post_id = wp_insert_post($shot_post);
- add_post_meta($post_id, ‘link_url’, $shot_post_meta[‘link_url’], true);
- add_post_meta($post_id, ‘image’, $shot_post_meta[‘image’], true);
- }
- }
- ?>
修改第66行的”http://dribbble.com/tammyhart/shots.rss“为准备抓取文章站点的RSS地址，还可以修改第80行后的”shot“为你所用主题自定义分类法名称，抓取的文章会自动添加到该分类法中。
上述代码中并没有抓取文章内容的功能，仅供参考学习之用。
