Introduction
Acknowledgements
Content
Structure
1. Extension
2. Core
Constants
Functions
1. Arguments
2. 1. Scalar Types
  2. 1. Boolean
    2. Integer
    3. Floating point numbers
    4. Strings
  3. Compound Types
  4. 1. Arrays
    2. Objects
    3. Callable
    4. Iterable
    5. Enumerations
  5. Special Cases
  6. 1. Optional Parameters
    2. Passing by Reference
    3. Default Argument Values
    4. Variable-length Argument Lists (Variadics)
3. Return Values
4. 1. No Return Value
  2. Scalar Types
  3. Arrays
  4. Objects
Classes
1. Class Constants
2. Class Methods
3. Class Properties
4. Class Interface
5. 1. Implement an Interface
6. Class Inheritance
7. 1. Abstract Class
  2. Extend a Class

Introduction

This book is not intended to be an exhaustive coverage of internal details of PHP, but rather a quick and easy reference for developers that are learning, exploring or even contributing to PHP itself.

For a more comprehensive and detailed write of how PHP works internally, the best available resource (besides the PHP source code itself), is The PHP Internals Book.

PHP Core: How do I..?

Introduction