Book Image

Learning PHP Data Objects

By : Dennis Popel
Book Image

Learning PHP Data Objects

By: Dennis Popel

Overview of this book

PDO is lighter, faster, and more powerful than existing PHP data abstraction interfaces. PDO is a common interface to different databases that must be used with a database-specific PDO driver to access a particular database server: the PDO extension does not provide a database abstraction by itself; it doesn't rewrite SQL, emulate missing database features, or perform any database functions using by itself. It performs the same role as other classic database abstraction layers such as ODBC and JDBC: it's a query abstraction layer that abstracts the mechanism for accessing a database and manipulating the returned records; each database driver that implements the PDO interface can also expose database-specific features as regular extension functions. ¬ PDO ships with PHP 5.1, and is available as an extension for PHP 5.0; it requires the new object-oriented features of PHP 5, and cannot run with earlier versions of PHP.This book will teach you how to use the PDO, including its advanced features. Readers need to be aware of the basics of data abstraction and should be familiar with PHP.
Table of Contents (13 chapters)

Chapter 2. Using PHP Data Objects: First Steps

In the previous chapter, we had a brief overview of what PDO is, how to connect to your favourite database using PDO, how to issue simple queries and how to handle errors. Now that you are convinced that PDO is a good thing and are thinking of using it actively, we will be delving into all the features it has to offer.

In this chapter, we will look more closely at creating connections to a database using PDO and connection strings (data source names), the PDOStatement class, and how to traverse result sets. We will also create a small library management application, which will allow us to manage a collection of books of your home library. The application will be able to list books and authors as well as add and edit them.

We will start by having a look at connection strings, since without them, we will not be able to connect to any database. We will then create a sample database, on which all the examples in this book will be based.

We will depart...