//Saber la IP
$IP = $_SERVER['REMOTE_ADDR'];
$query = mysql_query("SELECT IP FROM #__stats_agents WHERE IP LIKE '$IP'");
if(mysql_num_rows($query)>0)
{//No contamos visita
}
else
{//Para contar y sumar
$query2 = "INSERT INTO #__stats_agents (agent, type, hits, IP) VALUES ('RadicalEd', '1', '1', '$IP')";
$database->setQuery( $query2 );
}