October 2016
Intermediate to advanced
320 pages
6h 39m
English
Content preview from PHP 7 Programming BlueprintsBecome 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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Chapter 2. Build a Database Class and Simple Shopping Cart
For our previous app, which was just user profiles, we only created a simple Create-Read-Update-Delete (CRUD) database abstraction layer - basic stuff. In this chapter, we will create a better database abstraction layer that will allow us to do more than just basic database functions.
Aside from the simple CRUD features, we will add result manipulation into the mix. We'll build the following features into our database abstraction class:
- Conversion of integers to other, more accurate numeric types
- Array to object conversion
firstOf()method: Allows us to select the first of the results of a database querylastOf()method: Allows us to select the last of the results of a database queryiterate() ...
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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.