[offon]

Код:

new textv2[128], name[MAX_PLAYER_NAME];
GetPlayerName(playerid, name, sizeof (name));
format(textv2, sizeof (textv2), "{00FF00}Player{FFFFFF} %s: %s", playerid, name, text);
SendPlayerMessageToAll(playerid, textv2);

If you don't have return 0; in OnPlayerText, but instead have return 1; change it to 0.