- PHP the right way (great read)
- Codeacademy
- OOP in PHP
- Functional Programming in PHP
- PHP advices for Novices
- Dependencies with Composer
- Composer's Vendor Directory (a bit advanced)
- Coding Standards (especially psr-1 and psr-2)
- The PSR Standards
- Design Patterns
- Documentation (more for later lookups)
- Git Internals (covers a whole bunch)
- Git Concepts Simplified (I wish I had that back then...)
- Learning to Branch (after you know why)
- A Simple Branching Model
- A Complex Branching Model (now you learn a model)
- Git Tips (advanced)
- GitHub Issues
- Introduction to Git (Tim Berglund)
- Advanced Git (Tim Berglund)
- How GitHub Works Slides - Video (Zach Holman)
- Git & GitHub Secrets Slides - Video] (Zach Holman)