[Sasoft]

Something like this?

pawn Code:

CMD:invite(playerid,params[])
{
    if(PlayerInfo[playerid][pGroup] == 1)
    {
        new targetid;
        if(PlayerInfo[playerid][Group] == 255) return SendClientMessage(playerid,COLOR_ERROR,"[ERROR]: You're not in a group ");
        if(sscanf(params,"u",targetid)) return SendClientMessage(playerid,COLOR_SYNTAX,"[SYNTAX]: /invite [targetid] ");
        if(targetid==INVALID_PLAYER_ID) return SendClientMessage(playerid,COLOR_ERROR,"[ERROR]: Player is not connected. ");
        else
        {
            PlayerInfo[playerid][pGroup] =1;
            SendClientMessage(targetid, COLOR_GREY, "You've have been invited to our Group.");
        }
    }
    else if(PlayerInfo[playerid][pGroup] == 2)
    {
        new targetid;
        if(PlayerInfo[playerid][Group] == 255) return SendClientMessage(playerid,COLOR_ERROR,"[ERROR]: You're not in a group ");
        if(sscanf(params,"u",targetid)) return SendClientMessage(playerid,COLOR_SYNTAX,"[SYNTAX]: /invite [targetid] ");
        if(targetid==INVALID_PLAYER_ID) return SendClientMessage(playerid,COLOR_ERROR,"[ERROR]: Player is not connected. ");
        else
        {
            PlayerInfo[playerid][pGroup] =2;
            SendClientMessage(targetid, COLOR_GREY, "You've have been invited to our Group.");
        }
    }