June 2002
Intermediate to advanced
800 pages
16h 3m
English
Content preview from PHP and PostgreSQL: Advanced Web ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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15.1. Managing Sessions with Cookies
One way to identify users and to store data is to use cookies. For a long time cookies were the only solution for storing session data permanently, and they are still widely used today.
15.1.1. Cookie Fundamentals
HTTP is not a connection-oriented protocol, so cookies can be used to fake some sort of permanent interaction with the server. The idea of a cookie is to store information directly on the client. Whenever a site is called, the information in the appropriate cookie is sent to the server automatically. Keep in mind that the server does not look for the cookie—the information is sent to the server by the browser automatically. Let's look at a simple example:
<?php setcookie ("YourName", "Hans-Jürgen ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.