How to override functions from vendor in Yii2?

Question

Yii

in lib, you need to add 1 function and slightly redo the other, but so far it was only enough to copy-paste the file into components ...

Answer 1

1) Create a class
2) Inherit from the required vendor class
3) Create your own function. Redefine the required function
4) Use the overridden class, where the vendor's used to be
5) profit