[Urefeu]

Thank you!

You're just wrong, the correct code is this:

PHP код:

CMD:s(playerid, params[]) return cmd_skin(playerid, params); // Inattention ;D
CMD:skin(playerid, params[])
{
    new skin = strval(params);
    if(isnull(params) || skin > 299 || skin < 0) {
        return exception(playerid, ERROR_USE, "/skin <skinid [0-299]>");
    }
    SetPlayerSkin(playerid, skin);
    log(playerid, TYPE_COMMANDE_ADMIN, compressCommand("skin", params));
    return 1;
} 


it works, thank you