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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 |
---|---|
2640 |
|
2641 | /** |
2642 | * Filters the ORDER BY clause of the comments feed query before sending. |
2643 | * |
2644 | * @since 2.8.0 |
2645 | * |
2646 | * @param string $corderby The ORDER BY clause of the query. |
2647 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2648 | */ |
2649 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
2650 |
|
2651 | /** |
2652 | * Filters the LIMIT clause of the comments feed query before sending. |
2653 | * |
2654 | * @since 2.8.0 |
2655 | * |
2656 | * @param string $climits The JOIN clause of the query. |
2657 | * @param WP_Query $query The WP_Query instance (passed by reference). |
2658 | */ |
Line | Code |
3060 |
|
3061 | /** This filter is documented in wp-includes/query.php */ |
3062 | $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
3063 |
|
3064 | /** This filter is documented in wp-includes/query.php */ |
3065 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
3066 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
3067 |
|
3068 | /** This filter is documented in wp-includes/query.php */ |
3069 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
3070 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
3071 |
|
3072 | /** This filter is documented in wp-includes/query.php */ |
3073 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option( 'posts_per_rss' ), &$this ) ); |
3074 |
|
3075 | $comments_request = "SELECT {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits"; |
3076 | $comments = $wpdb->get_results( $comments_request ); |
3077 | // Convert to WP_Comment. |
3078 | /** @var WP_Comment[] */ |