posts_groupby │ filter-hook │ WP 2.0.0

Filters the GROUP BY clause of the query.

Usage

add_filter( 'posts_groupby', 'wp_kama_posts_groupby_filter' );

/**
 * Function for `posts_groupby` filter-hook.
 * 
 * @param string $groupby The GROUP BY clause of the query.
 *
 * @return string
 */
function wp_kama_posts_groupby_filter( $groupby ){

	// filter...
	return $groupby;
}

$groupby(string)

The GROUP BY clause of the query.

Changelog

Where the hook is called

$groupby = apply_filters_ref_array( 'posts_groupby', array( $groupby, &$this ) );

Where the hook is used in WordPress