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Modern PHP Mastery

From Fundamentals to Expert-Level Programming with PHP 8

This book is 100% completeLast updated on 2026-07-13
Steve Publications

Master modern PHP from the ground up with this comprehensive guide to PHP 8.x. From basic syntax and variables to advanced features such as fibers, intersection types, and memory management, this book combines practical examples, real-world insights, and hands-on exercises to help you develop expert-level PHP skills and a deep understanding of the language itself.

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About the Book

PHP has undergone a remarkable transformation over the last decade. What was once dismissed as a simple scripting language for generating dynamic web pages has evolved into a modern, type-safe, and expressive programming language. This book takes you on a comprehensive journey from absolute beginner to expert-level proficiency in modern PHP (8.x). Every chapter builds upon the last, covering everything from basic syntax and variables to advanced topics like fibers, intersection types, and memory management. Through progressively complex examples, real-world scenarios, exercises, and best practices drawn from production experience, you will develop a deep understanding of the PHP language itself. No frameworks, no shortcuts, just pure PHP mastery.

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About the Author

Steve Publications

Steve is a technology professional with more than 20 years of experience in software development, server infrastructure, cybersecurity, vulnerability research and reverse engineering. Throughout his career, he has designed, secured, analyzed and tested complex software and infrastructure, with a particular focus on understanding how systems fail and how they can be made more secure.

Outside of work, Steve enjoys sharing knowledge with the technology community. He collaborates with researchers, industry experts and technology professionals to write practical books covering software development, cybersecurity, cloud computing, networking, DevOps, artificial intelligence and enterprise technologies. His books focus on practical learning through clear explanations, real-world examples and hands-on exercises. With more than two decades of industry experience, his goal is to help IT professionals, students and technology enthusiasts build useful skills and stay current in a rapidly changing industry.

We believe readers deserve to know how our books are created. Most of our authors are not native English speakers, so we use AI to help translate, proofread manuscripts, fix grammar, improve sentence structure and make technical explanations easier to read. AI is used as an editing tool only. It does not replace the research, technical knowledge or hands-on experience behind our books. Some of our authors also prefer to remain anonymous for privacy or professional reasons. In those cases, we publish their work under a different name. The author's name may be different, but the quality of the content and our review process remain the same.

Every book is written, reviewed and maintained by experienced technology professionals, with contributions from our private technical community of more than 400 engineers and researchers from Ukraine, Belarus and Russia. We spend far more time validating technical accuracy and keeping our content up to date than generating text. We are always interested in working with experienced professionals who have deep expertise in a particular technology or domain. If you would like to publish a book with us or help review an existing manuscript, we'd love to hear from you. Send us a message describing your area of expertise. We are especially interested in niche technologies, specialized skills and emerging topics that are underrepresented in existing technical literature.

If you look through the contents of our books, you'll see practical examples, detailed explanations and material that is regularly updated. Our goal is to publish books that professionals can actually rely on, not low-effort AI-generated content. If you ever feel that one of our books does not meet that standard, Leanpub offers a 60-day money-back guarantee. Feel free to request a refund if you are not satisfied with your purchase.

Contents

Table of Contents

From Fundamentals to Expert-Level Programming with PHP 8

Introduction: The PHP You Don’t Know Yet

  1. Why This Book?
  2. How This Book Is Structured
  3. What You Need to Get Started
  4. How to Read This Book
  5. A Note on PHP Versions

Chapter 1: Getting Started with PHP

  1. What Is PHP?
  2. Installing and Configuring PHP
  3. Your First PHP Program
  4. How PHP Executes Code
  5. Development Tools and IDEs
  6. Chapter Summary
  7. Review Questions
  8. Hands-On Exercise

Chapter 2: Variables, Data Types, and Constants

  1. Variables and Naming Conventions
  2. Scalar Types
  3. Compound Types
  4. Special Types
  5. Constants and Typed Constants
  6. Type Juggling and Strict Types
  7. Deep Dive: How PHP Stores Values Internally
  8. Chapter Summary
  9. Review Questions
  10. Hands-On Exercise

Chapter 3: Operators and Expressions

  1. Arithmetic and Assignment Operators
  2. Comparison Operators
  3. Logical and Bitwise Operators
  4. Null Coalescing and Elvis Operators
  5. String Concatenation and Interpolation
  6. Operator Precedence and Associativity
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 4: Control Flow

  1. If, Elseif, and Else Statements
  2. Switch Statements
  3. The Match Expression (PHP 8.0+)
  4. For, Foreach, While, and Do-While Loops
  5. Break, Continue, and Goto
  6. Error Control Operator (@)
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 5: Functions Deep Dive

  1. Defining and Calling Functions
  2. Parameters, Arguments, and Default Values
  3. Named Arguments (PHP 8.0+)
  4. Variable-Length Arguments (…args)
  5. Return Types and Union Types
  6. Anonymous Functions and Closures
  7. Arrow Functions (PHP 7.4+)
  8. First-Class Callable Syntax (PHP 8.1+)
  9. Recursion and Callbacks
  10. Chapter Summary
  11. Review Questions
  12. Hands-On Exercise

Chapter 6: Arrays – PHP’s Workhorse

  1. Indexed and Associative Arrays
  2. Multidimensional Arrays
  3. Array Functions (Map, Filter, Reduce Patterns)
  4. Array Destructuring (PHP 7.1+)
  5. SplFixedArray and Specialized Arrays
  6. Performance Considerations with Large Arrays
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 7: Strings and Text Processing

  1. String Literals (Single vs Double Quotes)
  2. String Functions and Manipulation
  3. String Interpolation and Heredoc/Nowdoc
  4. Regular Expressions with PCRE
  5. Multibyte String Handling (mbstring)
  6. String Comparison and Collation
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 8: Object-Oriented Programming Foundations

  1. Classes and Objects
  2. Properties and Visibility
  3. Methods and the $this Keyword
  4. Constructors and Destructors
  5. Static Properties and Methods
  6. Magic Methods
  7. Late Static Binding
  8. Chapter Summary
  9. Review Questions
  10. Hands-On Exercise

Chapter 9: Advanced Object-Oriented Features

  1. Inheritance and Method Overriding
  2. Abstract Classes and Methods
  3. Interfaces and Multiple Interface Implementation
  4. Traits and Trait Conflicts
  5. Readonly Properties and Classes (PHP 8.1+)
  6. Enums (PHP 8.1+)
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 10: Namespaces, Autoloading, and Attributes

  1. Namespaces and Aliasing
  2. PSR-4 Autoloading Standard
  3. Composer and Dependency Management
  4. Attributes (PHP 8.0+)
  5. Reflection API
  6. The Standard PHP Library (SPL)
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 11: Error Handling and Exceptions

  1. Errors vs Exceptions in PHP
  2. Try, Catch, Finally Blocks
  3. Custom Exception Classes
  4. The Throwable Interface Hierarchy
  5. Error Handling Functions and Callbacks
  6. The Nullsafe Operator (PHP 8.0+)
  7. Debugging Techniques
  8. Chapter Summary
  9. Review Questions
  10. Hands-On Exercise

Chapter 12: Generators, Iterators, and Fibers

  1. Generators (yield)
  2. Generator Delegation (yield from)
  3. Generator Send and Return Values
  4. Iterator Interface and SPL Iterators
  5. The Iterable Pseudo-Type
  6. Fibers (PHP 8.1+)
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 13: File I/O, Streams, and Serialization

  1. File Reading and Writing
  2. Directory Operations
  3. Stream Wrappers and Filters
  4. JSON Encoding and Decoding
  5. Serialization and Unserialization
  6. CSV Processing
  7. Chapter Summary
  8. Review Questions
  9. Hands-On Exercise

Chapter 14: Type System Mastery

  1. Scalar Type Declarations
  2. Return Type Declarations
  3. Union Types (PHP 8.0+)
  4. Intersection Types (PHP 8.1+)
  5. The Standalone Null and False Types (PHP 8.2+)
  6. The True Type (PHP 8.2+)
  7. Typed Class Constants (PHP 8.3+)
  8. Type System Deep Dive: How PHP Checks Types
  9. Chapter Summary
  10. Review Questions
  11. Hands-On Exercise

Chapter 15: Performance, Security, and Professional Practices

  1. Memory Management and Garbage Collection
  2. Performance Optimization Techniques
  3. Security Best Practices at the Language Level
  4. Coding Standards (PSR-12)
  5. Static Analysis with PHPStan and Psalm
  6. Testing Fundamentals (PHPUnit basics)
  7. Modern Development Workflow
  8. Chapter Summary
  9. Review Questions
  10. Hands-On Exercise

Conclusion: The Future of PHP

  1. Where to Go From Here
  2. The Bigger Picture
  3. Final Thoughts

References

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