Best PHP programming Books

If you are looking for books on PHP programming to advance your knowledge, here is the best list in various formats available for free:

CakePHP Framework

• CakePHP Cookbook 2.x (PDF)

CodeIgniter Framework

• CodeIgniter 2.2.6
• CodeIgniter 3.1.6

Drupal Framework

- Drupal 7

• The Tiny Book of Rules (PDF)

Laravel Framework
- Laravel 3

• Laravel: Code Happy – Dayle Rees

- Laravel 4

• Laravel: Code Bright – Dayle Rees

- Laravel 5

• Laravel 5.x Official Documentation. Synced Daily (Leanpub account or valid email requested)

Laravel Best Practices
Laravel: Code Smart – Dayle Rees
Laravel Collections Unraveled – Jeffrey Madsen (Leanpub account or valid email requested)
PHP 5 Power Programming (PDF)
PHP Best Practices
PHP Internals Book
PHP Pandas – Dayle Rees
PHP Programming – Wikibooks
PHP Security Guide
PHP: The Right Way
PHPUnit Manual – Sebastian Bergmann (PDF)
Practical PHP Programming
Practical PHP Testing
Survive The Deep End: PHP Security
Symfony Framework
- Symfony 2.8

• The Symfony Book 2.8.x (PDF)

- Symfony 3.4

• The Symfony Best practices 3.4.x (PDF)
• The Symfony Book 3.4.x
• The Symfony Getting started 3.4.x (PDF)

- Symfony 4.1

• The Symfony Best practices 4.1.x (PDF)
• The Symfony Book 4.1.x
• The Symfony Getting started 4.1.x (PDF)

Using Libsodium in PHP Projects
Zend Framework

• Using Zend Framework 3