[BigD]

pawn Код:

public OnPlayerConnect(playerid)
{
    new pname[MAX_PLAYER_NAME], string[22 + MAX_PLAYER_NAME];
    GetPlayerName(playerid, pname, sizeof(pname));
    format(string, sizeof(string), "%s has joined the server", pname);
    SendClientMessageToAll(0xAAAAAAAA, string);
    return 1;

Thats from the tutorial, you need to customize it for your script.