[iggy1]

pawn Код:

if(IsPlayerInRangeOfPoint(playerid, 3.0, 249.0186,1842.6013,8.7672))
{
     CreateExplosion(249.0186,1842.6013,8.7672, 2, Float:5);
     new string[128]; new playerName[MAX_PLAYER_NAME];
     GetPlayerName(playerid, playerName, MAX_PLAYER_NAME);
     format(string, sizeof(string), "%s Was Exploded by the anti attack!", playerName);
     SendClientMessageToAll(COLOR_RED, string);
}

might be a better way of doing that.

EDIT: Or try this:
At bottom of script

pawn Код:

stock playername(playerid)
{
    new pname[MAX_PLAYER_NAME];
    GetPlayerName(playerid,pname,sizeof(pname));
    return pname;
}

wherever you put this.

pawn Код:

if(IsPlayerInRangeOfPoint(playerid, 3.0, 249.0186,1842.6013,8.7672))
{
     CreateExplosion(249.0186,1842.6013,8.7672, 2, Float:5);
     new string[128];
     format(string, sizeof(string), "%s Was Exploded by the anti attack!", playerName(playerid));
     SendClientMessageToAll(COLOR_RED, string);
}

That how id do it. The playername functon is exelent.