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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 |
|---|---|
| 2527 | $cwhere = "WHERE comment_approved = '1' $where"; |
| 2528 | $cgroupby = "$wpdb->comments.comment_id"; |
| 2529 | } else { // Other non singular e.g. front |
| 2530 | $cjoin = "JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )"; |
| 2531 | $cwhere = "WHERE post_status = 'publish' AND comment_approved = '1'"; |
| 2532 | $cgroupby = ''; |
| 2533 | } |
| 2534 | |
| 2535 | if ( !$q['suppress_filters'] ) { |
| 2536 | $cjoin = apply_filters_ref_array('comment_feed_join', array( $cjoin, &$this ) ); |
| 2537 | $cwhere = apply_filters_ref_array('comment_feed_where', array( $cwhere, &$this ) ); |
| 2538 | $cgroupby = apply_filters_ref_array('comment_feed_groupby', array( $cgroupby, &$this ) ); |
| 2539 | $corderby = apply_filters_ref_array('comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2540 | $climits = apply_filters_ref_array('comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2541 | } |
| 2542 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2543 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2544 | |
| 2545 | $this->comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits"); |
| Line | Code |
| 2653 | $this->posts = $wpdb->get_results( $this->request ); |
| 2654 | $this->set_found_posts( $q, $limits ); |
| 2655 | } |
| 2656 | |
| 2657 | // Raw results filter. Prior to status checks. |
| 2658 | if ( !$q['suppress_filters'] ) |
| 2659 | $this->posts = apply_filters_ref_array('posts_results', array( $this->posts, &$this ) ); |
| 2660 | |
| 2661 | if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) { |
| 2662 | $cjoin = apply_filters_ref_array('comment_feed_join', array( '', &$this ) ); |
| 2663 | $cwhere = apply_filters_ref_array('comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
| 2664 | $cgroupby = apply_filters_ref_array('comment_feed_groupby', array( '', &$this ) ); |
| 2665 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2666 | $corderby = apply_filters_ref_array('comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2667 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2668 | $climits = apply_filters_ref_array('comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2669 | $comments_request = "SELECT $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits"; |
| 2670 | $this->comments = $wpdb->get_results($comments_request); |
| 2671 | $this->comment_count = count($this->comments); |