I am asking for help with OOP links in PHP

Misters PHP-developers and “pretending”, please - share links to resources where you can learn more knowledge to help achieve a good understanding of OOP in PHP. Namely, on those sites where a lot is told about patterns (mappers, fronts, factories, etc.) and levels of abstraction (I won’t be more precise, because I doubt my own interpretation of the term).
It is also possible for scripts (engines) of something developed using the described approaches.