[Dayrion]

Can you please, pleave, give more explications.
I mean, your command isn't working because nothing is check before if(id == playerid) ? If OnPlayerCommandPerformed is called, it's something is returning 0.

Try this one:

PHP код:

CMD:gethere(playerid,params[])
{
    new id;
        // codes...
    if(sscanf(params, "u",id)) return SendClientMessage(playerid,COLOR,"Use: {FFFFFF}/gethere [ID / Name]");
    /* u : player id or player's part of name
    - You don't need else here*/
     if(PlayerInfo[id][LoggedOn] == false) return SCM(playerid, COLOR,"That dude is offline!");
    if(id == INVALID_PLAYER_ID || id == playerid)return SCM(playerid,COLOR,"Wrong ID!");
    // codes... 


EDIT: Mistakes (thx Sew_Sumi)