comment_feed_groupby │ filter-hook │ WP 2.2.0

Filters the GROUP BY clause of the comments feed query before sending.

Usage

add_filter( 'comment_feed_groupby', 'wp_kama_comment_feed_groupby_filter', 10, 2 );

/**
 * Function for `comment_feed_groupby` filter-hook.
 * 
 * @param string   $cgroupby The GROUP BY clause of the query.
 * @param WP_Query $query    The WP_Query instance (passed by reference).
 *
 * @return string
 */
function wp_kama_comment_feed_groupby_filter( $cgroupby, $query ){

	// filter...
	return $cgroupby;
}

$cgroupby(string)

The GROUP BY clause of the query.

$query(WP_Query)

The WP_Query instance (passed by reference).

Changelog

Where the hook is called

$cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( $cgroupby, &$this ) );

$cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) );

Where the hook is used in WordPress