Which books are recommended for learning PHP?

There are many books available for learning PHP, but they can quickly become outdated in a short period of time. Included here is a quick list of PHP books you should look into when learning PHP or extending your knowledge. Also keep in mind that writing a very good programming book can take several thousand hours, so supporting their authors is nice way of saying thank you.

Free PHP books

• Official PHP manual - Official PHP manual is also available for offline usage.
• Clean Code PHP - Robert C. Martin’s book Clean Code, adapted for PHP.
• Hacking with PHP - PHP book from beginning to advanced.
• PHP: The Right Way - An easy to read, quick reference for PHP best practices, accepted coding standards, and links to authoritative PHP tutorials around the web. “PHP: The Right Way” is also available as a PDF book.
• PHP 5 Power Programming
• PHP Best Practices - A short, practical guide for common and confusing PHP tasks.
• PHP Essentials
• PHP Internals Book
• PHP Notes for Professionals
• PHP Pandas - Aims to teach everyone how to be a web developer.
• PHP Programming
• PHP Security Guide
• Practical PHP Programming
• Practical PHP Testing
• Survive The Deep End: PHP Security - PHP Security
• Wikibooks PHP Programming - A PHP programming book on Wikibooks.
• Using Libsodium in PHP Projects - A guide to using the libsodium PHP extension for modern, secure, and fast cryptography.

Paid PHP books

• Build APIs You Won’t Hate
• Building Secure PHP Apps
• Iterating PHP Iterators
• Learnable: PHP Master: Write Cutting-edge Code
• Modern PHP: New Features and Good Practices
• Modernizing Legacy Applications In PHP
• PHP Objects, Patterns, and Practice
• Practical Design Patterns
• Securing PHP: Core Concepts
• Securing PHP: Usual Suspects
• Scaling PHP
• Signaling PHP
• The Grumpy Programmer’s Guide To Building Testable PHP Applications
• Typed PHP
• O’Reilly: PHP Books