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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 3245 | |
| 3246 | /** |
| 3247 | * Filter the GROUP BY clause of the comments feed query before sending. |
| 3248 | * |
| 3249 | * @since 2.2.0 |
| 3250 | * |
| 3251 | * @param string $cgroupby The GROUP BY clause of the query. |
| 3252 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 3253 | */ |
| 3254 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( $cgroupby, &$this ) ); |
| 3255 | |
| 3256 | /** |
| 3257 | * Filter the ORDER BY clause of the comments feed query before sending. |
| 3258 | * |
| 3259 | * @since 2.8.0 |
| 3260 | * |
| 3261 | * @param string $corderby The ORDER BY clause of the query. |
| 3262 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
| 3263 | */ |
| Line | Code |
| 3632 | |
| 3633 | if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) { |
| 3634 | /** This filter is documented in wp-includes/query.php */ |
| 3635 | $cjoin = apply_filters_ref_array( 'comment_feed_join', array( '', &$this ) ); |
| 3636 | |
| 3637 | /** This filter is documented in wp-includes/query.php */ |
| 3638 | $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) ); |
| 3639 | |
| 3640 | /** This filter is documented in wp-includes/query.php */ |
| 3641 | $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) ); |
| 3642 | $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : ''; |
| 3643 | |
| 3644 | /** This filter is documented in wp-includes/query.php */ |
| 3645 | $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) ); |
| 3646 | $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : ''; |
| 3647 | |
| 3648 | /** This filter is documented in wp-includes/query.php */ |
| 3649 | $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) ); |
| 3650 | |