[Konstantinos]

pawn Код:

new
    bool: PlayerInHouse[ MAX_PLAYERS char ]
;

// OnPlayerConnect:
PlayerInHouse{ playerid } = false;

// OnPlayerKeyStateChange:
if(newkeys & KEY_NO)
{
    if(GetPlayerState(playerid) == PLAYER_STATE_ONFOOT)
    {
        if(!PlayerInHouse{ playerid })
        {
            PlayerInHouse{ playerid } = true;
            return cmd_enter(playerid, "");
        }
        else
        {
            PlayerInHouse{ playerid } = false;
            return cmd_exit(playerid, "");
        }
    }
}