[Skimmer]

I have a stock function for you, which sends message to range players of specific position.

pawn Код:

SendMessageToRangePlayer(color, message[], x, y, z, range = 30.0)

pawn Код:

stock SendMessageToRangePlayer(color, message[], x, y, z, range = 30.0)
{
    for(new i = 0; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i) && IsPlayerInRangeOfPoint(i, range, x, y, z))
        {
            SendClientMessage(i, color, message);
        }
    }
    return 1;
}

You can use as example below OnPlayerText.

pawn Код:

public OnPlayerText(playerid, text[])
{
    new Float:x, Float:y, Float:z;
    GetPlayerPos(playerid, x, y, z);
    new string[128], pName[MAX_PLAYER_NAME];
    GetPlayerName(playerid, pName, sizeof(pName));
    format(string, sizeof(string), "%s:  %s", pName[playerid], text);

    SendMessageToRangePlayer(-1, string, x, y, z);
    return 1;
}