Sets a list of group names for the item with URI uri. Each previously set group name list is removed. If uri cannot be found then an item for it is created. Since 2.12
an item's URI
an array of group names, or NULL to remove all groups
number of group name values in groups
See Implementation
Sets a list of group names for the item with URI uri. Each previously set group name list is removed. If uri cannot be found then an item for it is created. Since 2.12