This is a collection of 23 GoF patterns from variuos sources:
- https://sourcemaking.com/
- https://refactoring.guru/
- https://github.com/eimg/design-patterns-php
- https://www.packtpub.com/application-development/mastering-php-design-patterns
- https://www.jakowicz.com/category/design-patterns/
- https://github.com/kamranahmedse/design-patterns-for-humans#-memento
- https://phpenthusiast.com/blog