December 2001
Intermediate to advanced
520 pages
13h 42m
English
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Mcrypt
There are security problems with almost any Web application you develop and the simple registration form created so far is no exception. It does use HTML, JavaScript, and PHP to check the user-submitted data and it protects the user's password by encrypting it, but there is still one major concern: the user's personal data—first and last names, email address, and birthday—are stored unencrypted in a readable text file.
One solution might be to use the crypt() function to encrypt this information before storing it. However, the crypt() function has no decrypt() counterpart you could use to turn the encoded data back into readable form. Storing an encrypted email address that you could not decrypt serves no purpose at all.
It would be preferable ...
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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.