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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 |
|---|---|
| 2482 | |
| 2483 | /** |
| 2484 | * Filters the LIMIT clause of the comments feed query before sending. |
| 2485 | * |
| 2486 | * @since 2.8.0 |
| 2487 | * |
| 2488 | * @param string $climits The JOIN clause of the query. |
| 2489 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 2490 | */ |
| 2491 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2492 | } |
| 2493 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2494 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2495 | |
| 2496 | $comments = (array) $wpdb->get_results("SELECT $distinct {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"); |
| 2497 | // Convert to WP_Comment |
| 2498 | $this->comments = array_map( 'get_comment', $comments ); |
| 2499 | $this->comment_count = count($this->comments); |
| 2500 | |
| Line | Code |
| 2885 | /** This filter is documented in wp-includes/query.php */ |
| 2886 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
| 2887 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2888 | |
| 2889 | /** This filter is documented in wp-includes/query.php */ |
| 2890 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2891 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2892 | |
| 2893 | /** This filter is documented in wp-includes/query.php */ |
| 2894 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2895 | |
| 2896 | $comments_request = "SELECT {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"; |
| 2897 | $comments = $wpdb->get_results($comments_request); |
| 2898 | // Convert to WP_Comment |
| 2899 | $this->comments = array_map( 'get_comment', $comments ); |
| 2900 | $this->comment_count = count($this->comments); |
| 2901 | } |
| 2902 | |
| 2903 | // Check post status to determine if post should be displayed. |