posts_groupby_request хук-фильтр . WP 2.5.0

Filters the GROUP BY clause of the query.

For use by caching plugins.

Использование

add_filter( 'posts_groupby_request', 'filter_function_name_6453', 10, 2 );
function filter_function_name_6453( $groupby, $this ){
	// filter...

	return $groupby;
}

$groupby(строка)

The GROUP BY clause of the query.

$this(WP_Query)

The WP_Query instance (passed by reference).

Где вызывается хук

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

Где используется хук (в ядре WP)