[Konstantinos]

You forgot the lenght. It's:

pawn Код:

format(string, sizeof(string), "Admin message from %s: %s", GetPlayerNameEx(playerid), message);
// Do the rest like that!

Yes, you want to check if a player is admin. You need to store the player's level somewhere. If you do, then check if his level is greater or equal to a number, then that player is admin. Otherwise, he is not.