[Kostas']

pawn Code:

public OnPlayerText(playerid, text[])
{
///{FFFFFF} = White
    new name[24], string[128]; GetPlayerName(playerid, name, sizeof name);
    format(string, sizeof string, "{FFFFFF}%i %s: %s ", playerid, name, text);
    SendClientMessageToAll(GetPlayerColor(playerid), string);
    return 0;
}

Also, if you want ID after the name this

Code:

format(string, sizeof string, "{FFFFFF}%s %i : %s ", playerid, name, text);