[Beckett]

pawn Код:

stock ProxDetector(Float:radi, playerid, string[],color)
{
    new Float:x,Float:y,Float:z;
    GetPlayerPos(playerid,x,y,z);
    foreach(Player,i)
    {
        if(IsPlayerInRangeOfPoint(i,radi,x,y,z))
        {
            MSG(i,color,string);
        }
    }
}

Give this one a go.