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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 |
|---|---|
| 2645 | |
| 2646 | /** |
| 2647 | * Filters the LIMIT clause of the comments feed query before sending. |
| 2648 | * |
| 2649 | * @since 2.8.0 |
| 2650 | * |
| 2651 | * @param string $climits The JOIN clause of the query. |
| 2652 | * @param WP_Query $this The WP_Query instance (passed by reference). |
| 2653 | */ |
| 2654 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option( 'posts_per_rss' ), &$this ) ); |
| 2655 | } |
| 2656 | |
| 2657 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2658 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2659 | $climits = ( ! empty( $climits ) ) ? $climits : ''; |
| 2660 | |
| 2661 | $comments = (array) $wpdb->get_results( "SELECT $distinct {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits" ); |
| 2662 | // Convert to WP_Comment. |
| 2663 | $this->comments = array_map( 'get_comment', $comments ); |
| Line | Code |
| 3055 | /** This filter is documented in wp-includes/query.php */ |
| 3056 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
| 3057 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 3058 | |
| 3059 | /** This filter is documented in wp-includes/query.php */ |
| 3060 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 3061 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 3062 | |
| 3063 | /** This filter is documented in wp-includes/query.php */ |
| 3064 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option( 'posts_per_rss' ), &$this ) ); |
| 3065 | |
| 3066 | $comments_request = "SELECT {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"; |
| 3067 | $comments = $wpdb->get_results( $comments_request ); |
| 3068 | // Convert to WP_Comment. |
| 3069 | $this->comments = array_map( 'get_comment', $comments ); |
| 3070 | $this->comment_count = count( $this->comments ); |
| 3071 | } |
| 3072 | |
| 3073 | // Check post status to determine if post should be displayed. |