db.php

codice:
<? // parametri del database
$db_host = "host";
$db_user = "user";
$db_password = "password";
$db_name = "nome_db";
$db = mysql_connect($db_host, $db_user, $db_password);
if ($db == FALSE)
die ("Errore nella connessione. Verificare i parametri nel file db.php");
mysql_select_db($db_name, $db)
or die ("Errore nella selezione del database. Verificare i parametri nel file db.php");
?>
alto.php

codice:
<? 
if ($sito_user=="" AND $sito_ospite=="") {
$query = "SELECT * FROM ospiti_connessi ORDER BY ID DESC";
$result = mysql_query($query, $db);
$row = mysql_fetch_array($result);
$id_ospiti = $row["ID"];
$ospite = $id_ospiti + 1;
$query = "INSERT INTO ospiti_connessi (Ultimo) VALUES (now())";
$result = mysql_query($query, $db);
setcookie("sito_ospite", "$ospite", mktime (0,0,0,date("m"),date("d"),date("Y")+1));
}
?>

<table bgcolor="#FFFFFF" width="100%"><tr><td width="50%">
...testo!</td><td width="50%"><form action="http://www.sitoit/ricerca/" method="post" style="margin:0" name="ricerca"><font size="+1">Cerca</font> <input name="Termine" type="text" size="20" style="background: #FECCFF;" />  <sup>Ricerca avanzata</sup></form></div></div></td></tr></table>
index.php

codice:
<?
include "include/db.php";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>titolotitle>
<meta name="robots" content="noindex">
<link rel="stylesheet" type="text/css" href="stile.css">
</head>
<body>
<div id="corpo">
<div id="alto"><? include "include/alto.php"; ?></div>

...