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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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
1388 | $cjoin = "LEFT JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID = $wpdb->posts.ID) $join "; |
1389 | $cwhere = "WHERE comment_approved = '1' $where"; |
1390 | $cgroupby = "GROUP BY $wpdb->comments.comment_id"; |
1391 | } else { // Other non singular e.g. front |
1392 | $cjoin = "LEFT JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )"; |
1393 | $cwhere = "WHERE post_status = 'publish' AND comment_approved = '1'"; |
1394 | $cgroupby = ''; |
1395 | } |
1396 |
|
1397 | $cjoin = apply_filters('comment_feed_join', $cjoin); |
1398 | $cwhere = apply_filters('comment_feed_where', $cwhere); |
1399 | $cgroupby = apply_filters('comment_feed_groupby', $cgroupby); |
1400 |
|
1401 | $this->comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby ORDER BY comment_date_gmt DESC LIMIT " . get_option('posts_per_rss')); |
1402 | $this->comment_count = count($this->comments); |
1403 |
|
1404 | $post_ids = array(); |
1405 |
|
1406 | foreach ($this->comments as $comment) |
Line | Code |
1447 |
|
1448 | $request = " SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits"; |
1449 | $this->request = apply_filters('posts_request', $request); |
1450 |
|
1451 | $this->posts = $wpdb->get_results($this->request); |
1452 | // Raw results filter. Prior to status checks. |
1453 | $this->posts = apply_filters('posts_results', $this->posts); |
1454 |
|
1455 | if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) { |
1456 | $cjoin = apply_filters('comment_feed_join', ''); |
1457 | $cwhere = apply_filters('comment_feed_where', "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'"); |
1458 | $comments_request = "SELECT $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere ORDER BY comment_date_gmt DESC LIMIT " . get_option('posts_per_rss'); |
1459 | $this->comments = $wpdb->get_results($comments_request); |
1460 | $this->comment_count = count($this->comments); |
1461 | } |
1462 |
|
1463 | if ( !empty($limits) ) { |
1464 | $found_posts_query = apply_filters( 'found_posts_query', 'SELECT FOUND_ROWS()' ); |
1465 | $this->found_posts = $wpdb->get_var( $found_posts_query ); |