[Kitten]

Well im sure you got dcmd and sscanf

Here u go u must be logged in as admin

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    dcmd(spec,4,cmdtext);
    return 0;
}

pawn Код:

dcmd_spec(playerid, params[])
{
    new
    id;
    if (sscanf(params, "u", id)) SendClientMessage(playerid,0xFF0000AA, "USAGE: /spec id");
    else if (id == INVALID_PLAYER_ID) SendClientMessage(playerid,0xFF0000AA, "Player is not found");
    else
    if(IsPlayerAdmin(playerid))
    {
        TogglePlayerSpectating(playerid, 1);
    }
    return 1;
}

NOT TESTED