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)

Modifying the Frontend to Use the Model

Now that we have removed the data access logic from the files that generate frontend pages, let's see how we should modify them. Let's start with the books.php file:

* This page lists all the books we have
* PDO Library Management example application
* @author Dennis Popel
// Don't forget the include
// Display the header
// Get the books list
$books = Model::getBooks();

// now create the table
Total books: <?=Model::getBookCount()?>

<table width="100%" border="1" cellpadding="3">
<tr style="font-weight: bold">
<td>Author and Title</td>
// Now iterate over every row and display it
while($b = $books->fetch())