About rewriting methods/properties in PHP. What is the best way to do this?

Question

Yii

I welcome everyone.
1. For example, there is a product card. And there is a base class Product. It has properties, for example: price, alias, descriptions, images. There are methods, CRUD, price recalculation with discounts / coupons, multi-level pricing, image cropping, etc.
2. What is the point. It is necessary that there was something like "plugins". For example, you need a plugin that will replay to product_type+product_name in it before displaying the description. Or, a plug-in that will insert into the "alias" field will translate the "product name" fields.
3. Logically, a solution suggests itself - to extend the Product class, and to shove the necessary functionality into the extended class. But there can be a LOT of plugins. Different plugins can be used on different domains/pages/categories. Therefore, I want a more elegant solution.
4. I see it like this (fantasizing =)))): a "plugins" folder is created, *.php files are thrown into it, each of which is logically a plugin, and at the language level is a class. The Product class, in which ONLY NECESSARY methods / properties are simply overwritten. (PHP will write "Fatal error: Cannot redeclare class ..." on such an attempt to rewrite)
Actually, this is the question. 1) How to solve such a problem more gracefully on bare PHP 2) It’s the same on Yii (maybe there is something provided for this kind of problems)

Answer 1

Behaviors
habrahabr.ru/post/208328
www.yiiframework.com/doc-2.0/yii-base-behavior.html

Answer 2

Traits, no?