A collection of 19 tips on understanding and using sessions in PHP. Clear explanations and tutorial exercises are provided on starting and closing sessions, saving and retrieving values in sessions, deciding how session IDs to be transferred, deciding where to store session files, deciding when to expire session values, etc. Topics included in this collections: What Is a Session? How To Turn On the Session Support? How To Save/Retrieve Values to the Current Session? What Is a Session ID? How To Retrieve the Session ID of the Current Session? What Are the Options to Transfer Session IDs? How Session IDs Are Transferred on Your Web Server? How To Force the PHP Engine to Use Cookies to Transfer Session IDs? Is It More Secure to Use Cookies to Transfer Session IDs? Where Are the Session Values Stored? What Set the Timeout Period on Session Values? How To Remove Values Saved in the Current Session? How To Tell If a Session Is New? What Is session_register()?

According to the cookie specification, any cookie set for one domain, must not be sent to any other domain. Therefore, if you set a cookie in your user's browser on one domain, that cookie will not be available on any other domain. This tutorial describes a solution to get around this issue.

This document describes how to customize the session handlers in PHP4. It provides examples of how to write a fully functional session handler that works with DBM files and one that works with a MySQL database.

Usage of sessions is sortly explained by using two examples: a hit counter and a simple password protection script.

A collection of 23 tips on understanding and managing cookies in PHP. Clear explanations and tutorial exercises are provided on setting and receiving cookies, creating and removing persistent cookies, specifying domain and path to restrict cookies, finding cookies in cookie files, cookie limitations: How To Send and receive a Cookie to the Browser? How To Set a Persistent Cookie? How To Remove a Cookie? How To Specify Domain and Path for a Cookie? How Cookies Are Transported from Servers to Browsers? How To View Cookie Header Lines? Where Are the Persistent Cookies Stored on Your Computer? How To View the Content of a Cookie File? How Many Cookies Can You Set? How Large Can a Single Cookie Be? How Are Cookies Encoded During Transportation? How Can Other Webmaster Steal Your Cookies? ......

A quick introduction to PHP sessions and the use of the most basic session handling functions.

A session is the time that a user spends at your Web site. Users may view many Web pages between the time they enter your site and leave it. Often you want information to be available for a complete session. Beginning with version 4.0, PHP provides a way to do this. PHP allows you to set up a session and store session variables. After you create a session, the session variables are available for your use on any other Web page.

This Article takes you step by step in creating a member system for your site. From designing mySQL tables, creating a registration script and logging them in with sessions and cookies.

Learn how to use cookies to allow user downloading a file only once. Limit people from accessing things more than once. Simple comments and explanations.

Code snippet for creating a unique randome ID for cookie management.