Preface
Installing/Configuring
PHP at the Core: A Hacker's Guide to the Zend Engine
PHP Manual

# The "counter" Extension - A Continuing Example

## Table of Contents

- Installing/Configuring
- Predefined Constants
- Examples
- The Counter class
- The basic interface
- The extended interface

# Preface

Throughout this Zend documentation, references are made to an example module in order to illustrate various concepts. The "counter" extension is this example, a fictional yet functional Zend module which strives to use as much of the Zend API as is reasonably possible. This short chapter describes the userland interface to the completed extension.

> Note: "counter" serves no practical purpose whatsoever, as the functionality it provides is far more effectively implemented by appropriate userland code.

Preface
Installing/Configuring
PHP at the Core: A Hacker's Guide to the Zend Engine
PHP Manual