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', 10, 2 );
function wp_kama_posts_groupby_filter( $groupby, $query ){
	// filter...

	return $groupby;
}

$groupby(string)

The GROUP BY clause of the query.

$query(WP_Query)

The WP_Query instance (passed by reference).

Changelog

Where the hook is called

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

Where the hook is used in WordPress