Here are some useful links that will help you during the onboarding, but will also prove useful later on.

WordPress

• WordPress Developer Reference
• WordPress Core Handbook
• WordPress Themes Handbook
• WordPress Plugins Handbook
• Gutenberg Documentation

Infinum

• Infinum Handbooks
• Eightshift Docs

PHP

• PHP The Right Way
• PHP Tutorial for Beginners
• Beginner PHP and MySQL Tutorial
• PHP For Beginners
• Refactoring Guru
• Debugging and profiling PHP with Xdebug
• Testing WordPress performance
• Code debugging in VVV

General

These are some of really useful books to read, and are located at the Infinum Library usually in digital format. You can browse the library and find other useful books to read, these are some of the recommendations that we believe will help you become a better developer:

• Robert C. Martin - Clean Code: A Handbook of Agile Software Craftsmanship
• Robert C. Martin - The Clean Coder: A Code of Conduct for Professional Programmers
• Robert C. Martin - Clean Agile: Back to Basics
• Martin Fowler - Refactoring: Improving the Design of Existing Code