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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
196 | <pubDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></pubDate> |
197 | <generator>http://wordpress.org/?v=<?php bloginfo_rss('version'); ?></generator> |
198 | <language><?php echo get_option('rss_language'); ?></language> |
199 | <?php if ( $cats ) : foreach ( $cats as $c ) : ?> |
200 | <wp:category><wp:category_nicename><?php echo $c->slug; ?></wp:category_nicename><wp:category_parent><?php echo $c->parent ? $cats[$c->parent]->name : ''; ?></wp:category_parent><?php wxr_cat_name($c); ?><?php wxr_category_description($c); ?></wp:category> |
201 | <?php endforeach; endif; ?> |
202 | <?php if ( $tags ) : foreach ( $tags as $t ) : ?> |
203 | <wp:tag><wp:tag_slug><?php echo $t->slug; ?></wp:tag_slug><?php wxr_tag_name($t); ?><?php wxr_tag_description($t); ?></wp:tag> |
204 | <?php endforeach; endif; ?> |
205 | <?php do_action('rss2_head'); ?> |
206 | <?php if ($post_ids) { |
207 | global $wp_query; |
208 | $wp_query->in_the_loop = true; // Fake being in the loop. |
209 | // fetch 20 posts at a time rather than loading the entire table into memory |
210 | while ( $next_posts = array_splice($post_ids, 0, 20) ) { |
211 | $where = "WHERE ID IN (".join(',', $next_posts).")"; |
212 | $posts = $wpdb->get_results("SELECT * FROM $wpdb->posts $where ORDER BY post_date_gmt ASC"); |
213 | foreach ($posts as $post) { |
214 | setup_postdata($post); ?> |