WB 2.08.x

 * check if one or more group_ids are in both group_lists

 *

 * @access public

 * @param mixed $groups_list1: an array or a coma seperated list of group-ids

 * @param mixed $groups_list2: an array or a coma seperated list of group-ids

 * @param array &$matches: an array-var whitch will return possible matches

 * @return bool: true there is a match, otherwise false

 */

	function is_group_match( $groups_list1 = '', $groups_list2 = '', &$matches = null )

	{

		if( $groups_list1 == '' ) { return false; }

		if( $groups_list2 == '' ) { return false; }

		if( !is_array($groups_list1) )

		{

			$groups_list1 = explode(',', $groups_list1);

		}

		if( !is_array($groups_list2) )

		{

			$groups_list2 = explode(',', $groups_list2);

		}

		$matches = array_intersect( $groups_list1, $groups_list2);

		return ( sizeof($matches) != 0 );

	}

/* ****************