How to learn UML as a PHP developer?

Question

PHP

An idea popped into my head! But there are problems when it comes to development. Perhaps this is due to the complexity of designing and coding at the same time. So I started thinking about how to separate these two tasks, and at one fine moment the abbreviation UML popped up in my head (perhaps because it was mentioned in the techie when I was studying :)). Recommend worthy literature, courses, video presentations to better understand UML and design an application; Preferably with lots of examples.

Answer 1

If you want for yourself, you can not bother - a piece of paper, a pen and go.
Start with the general interaction of the system components, and as you develop, detail each element separately.