April 2026
Intermediate
1009 pages
34h 15m
English
Content preview from PHP and MySQL
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13.4 Prefill
We described the previous form check as "not constructive" a few pages earlier. This is still the case—detailed error message or not. Imagine if the form was a little longer and a user filled it out, which would certainly take five minutes. Unfortunately, the user forgot an important field. So he receives an error message and wants to fill in the missing field. But to his annoyance, the form is displayed empty again. In other words, the user has to fill all the fields in again.
On some (cheaper) websites, the developers take a very simple approach and ask the user to simply press the Back button in their web browser. Unfortunately, this does not always work as not all browsers cache all information; this also depends on the local ...
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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.