Regarding PHP development:
- Refresh PHP knowledge
- Look into Magic Methods
- Look into best practices
- Look into composer
- Look into testing enviroments: PHPUnit
- Install XAMPP PHP development enviroment
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WampServer: How to set PHP development environment in windows? - Manual
Regarding WordPress:
- Look into WordPress development enviroment set up
- Look into WordPress best practices
- Look into WordPress plugin documentation
- Look into WordPress plugin testing framework
- Look into Developer Resources
Regarding XAMPP:
Debugger: Xdebug
- Coloroud output requires ANSICON
Dependency Management: Composer
Unit Testing: PHPUnit
Documentating code: phpDocumentor