Books recommended on r/PHPhelp

The most-mentioned books on r/PHPhelp.

PHP Objects, Patterns and Practice
8 users
Head First Design Patterns
4 users
PHP and MySQL Web Development
4 users
Design Patterns
3 users
Patterns of Enterprise Application Architecture
3 users
Head First PHP and MySQL
3 users

Looking for more? Similar subreddits are agile, hacking, lisp, netsecstudents, and SQL.