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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 |
|---|---|
| 2563 | $cwhere = "WHERE comment_approved = '1' $where"; |
| 2564 | $cgroupby = "$wpdb->comments.comment_id"; |
| 2565 | } else { // Other non singular e.g. front |
| 2566 | $cjoin = "JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )"; |
| 2567 | $cwhere = "WHERE post_status = 'publish' AND comment_approved = '1'"; |
| 2568 | $cgroupby = ''; |
| 2569 | } |
| 2570 | |
| 2571 | if ( !$q['suppress_filters'] ) { |
| 2572 | $cjoin = apply_filters_ref_array('comment_feed_join', array( $cjoin, &$this ) ); |
| 2573 | $cwhere = apply_filters_ref_array('comment_feed_where', array( $cwhere, &$this ) ); |
| 2574 | $cgroupby = apply_filters_ref_array('comment_feed_groupby', array( $cgroupby, &$this ) ); |
| 2575 | $corderby = apply_filters_ref_array('comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2576 | $climits = apply_filters_ref_array('comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2577 | } |
| 2578 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2579 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2580 | |
| 2581 | $this->comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits"); |
| Line | Code |
| 2694 | // Convert to WP_Post objects |
| 2695 | if ( $this->posts ) |
| 2696 | $this->posts = array_map( 'get_post', $this->posts ); |
| 2697 | |
| 2698 | // Raw results filter. Prior to status checks. |
| 2699 | if ( !$q['suppress_filters'] ) |
| 2700 | $this->posts = apply_filters_ref_array('posts_results', array( $this->posts, &$this ) ); |
| 2701 | |
| 2702 | if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) { |
| 2703 | $cjoin = apply_filters_ref_array('comment_feed_join', array( '', &$this ) ); |
| 2704 | $cwhere = apply_filters_ref_array('comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
| 2705 | $cgroupby = apply_filters_ref_array('comment_feed_groupby', array( '', &$this ) ); |
| 2706 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2707 | $corderby = apply_filters_ref_array('comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2708 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2709 | $climits = apply_filters_ref_array('comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2710 | $comments_request = "SELECT $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits"; |
| 2711 | $this->comments = $wpdb->get_results($comments_request); |
| 2712 | $this->comment_count = count($this->comments); |