: Players in Virtual World 1 cannot see or interact with players in Virtual World 2, even if they are standing at the exact same map coordinates. Common Uses :
: Moves a player to a specific world ID.
If you are looking to "download" this functionality for your server, you simply need to use the following already included in the SA-MP Wiki :
[Question] - Virtual Worlds? - Discussion - Cfx.re Community
In SA-MP, you can place a player in one of over different virtual worlds.