October 2009
Beginner
408 pages
7h 27m
English
Content preview from PHP for Absolute Beginners
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12.1. Email Validation
Validating a user's email address helps you avoid basic spam attempts. Some spam bots simply add garbage text into a form's inputs. By ensuring that the email input is filled out with a properly formatted email address, you can fend off the most primitive types of spam attacks.
However, you also want to keep in mind that people sometimes make typos, and if your comment form can't validate a user with a typo in her email address, you don't want to erase her comment completely and make her start over; this will frustrate your user and might prevent this person from joining the discussion on your blog.
To avoid this problem, you can save the comment in a session that you destroy only if the comment is posted successfully ...
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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.