12c04-2.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 34 行

<?php
// This is our include file.  Include it on every page in your website, and
//  it handles tracking the user for you.  Start by opening our session...
session_start();

// If the additional id is not present, then this is a new session.  
//  Generate a 40 character unique identifier using the function created 
//  in Listing 1.11. This combined with the session id, with hope to serve
//  as a TRUE unique ID.
$refer = 'NULL';
if (!isset($_SESSION['addid'])) {
    $_SESSION['addid'] = sha1($_SERVER['HTTP_USER_AGENT'] . 
        $_SERVER['REMOTE_ADDR'] . time() . rand());
    
    // Also, since this is the 'first visit', let's store the referrer
    $refer = "'{$_SERVER['HTTP_REFERER']}'";
}

// Open a database connection (Update these with your own DB server info)
$db = mysql_connect('localhost', 'my_user', 'my_password') 
    or die('DB Failure: ' . mysql_error());
mysql_select_db('my_database');

// Do the insert:
$sid = session_id();
mysql_query("
    insert into web_tracker
        (session, addid, 
         url, refer)
    values
        ('{$sid}', '{$_SESSION['addid']}', 
         '{$_SERVER['REQUEST_URI']}', {$refer})
    ");
?>