[Konstantinos]

I find this way much easier:

PHP код:

CMD:gang(playerid, params[])
{
    new
        tmp_name[50];
        
    if (!sscanf(params, "'create's[50]", tmp_name))
    {
        if(gang[playerid][gid] != -1) return SendClientMessage(playerid,COLOR_GREEN, "[GANG]:{FFFFFF}Leave your gang with /gang leave before creating a new one!");
        if(!(3 <= strlen(tmp_name) <= 49)) return SendClientMessage(playerid, COLOR_GREEN, "[GANG]:{FFFFFF} /gang create (GANG NAME)");
        if(IsgangTaken(tmp_name)) return SendClientMessage(playerid, COLOR_GREEN, "[GANG]:{FFFFFF}gang name is already in use!");
        Creategang(tmp_name, playerid);
    }
    else if (!strcmp(params, "leave", true))
    {
        // code for "/gang leave"
    }
    else SendClientMessage(playerid, COLOR_GREEN, "[GANG]:{FFFFFF} /gang <create (GANG NAME)/leave>");
    return 1;
}