April 2026
Intermediate
1009 pages
34h 15m
English
Content preview from PHP and MySQL
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33 Authentication
Security is one of the most important IT topics in today's world. And that's a good thing. User authentication is a key issue here.
One part of security is, of course, secure programming; you can read more about this in Chapter 32. But this chapter is about a task that developers also often face: identifying users on a website and giving them authorization.
Note
The terms authentication and authorization are sometimes used interchangeably. By definition, this is not correct: authentication is about recognizing the user; authorization is about granting the user rights. On the web, this is usually one step: the user logs in and thus gains access. However, authorization can also involve assigning rights, such as within a role ...
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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.
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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.