Module Automatic creation of product filters in OpenCart

The modifier was created to automate the creation of standard OpenCart filters.

The main features of the modifier:
- at the user's choice, collects attributes, options, manufacturers from all included products and creates standard filters
- filters are automatically linked to the corresponding products and their categories
- parses product attributes according to the specified separator and creates a separate filter for each element
- it is possible to complete automation, for example via cron

Installation procedure:
1. Install the modifier in the "Extensions" section -> "Installing extensions"
2. Update modifiers in the "Extensions" section -> "Modifiers"

Procedure:
After installing the modifier, the “Create filters” button will appear in the “Catalogue” -> “Filters” section; in the settings window, you need to select the necessary options and start creating. Attention! The filter creation process completely replaces all existing standard filters.

Since filters need to be created every time after adding/removing a product and editing product attributes, options and manufacturer in products, the modifier has a full automation function, for example, through cron or after running the product import module (additional steps will be required for configuration).

The modifier was tested on pure Opencart 3!