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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 |
|---|---|
| 2457 | |
| 2458 | /** |
| 2459 | * Filters the LIMIT clause of the comments feed query before sending. |
| 2460 | * |
| 2461 | * @since 2.8.0 |
| 2462 | * |
| 2463 | * @param string $climits The JOIN clause of the query. |
| 2464 | * @param WP_Query $this The WP_Query instance (passed by reference). |
| 2465 | */ |
| 2466 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2467 | } |
| 2468 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2469 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2470 | |
| 2471 | $comments = (array) $wpdb->get_results("SELECT $distinct {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"); |
| 2472 | // Convert to WP_Comment |
| 2473 | $this->comments = array_map( 'get_comment', $comments ); |
| 2474 | $this->comment_count = count($this->comments); |
| 2475 | |
| Line | Code |
| 2860 | /** This filter is documented in wp-includes/query.php */ |
| 2861 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
| 2862 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 2863 | |
| 2864 | /** This filter is documented in wp-includes/query.php */ |
| 2865 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 2866 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 2867 | |
| 2868 | /** This filter is documented in wp-includes/query.php */ |
| 2869 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 2870 | |
| 2871 | $comments_request = "SELECT {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"; |
| 2872 | $comments = $wpdb->get_results($comments_request); |
| 2873 | // Convert to WP_Comment |
| 2874 | $this->comments = array_map( 'get_comment', $comments ); |
| 2875 | $this->comment_count = count($this->comments); |
| 2876 | } |
| 2877 | |
| 2878 | // Check post status to determine if post should be displayed. |