Is there an illustrative example that describes tabular input and its processing?

Question

PHP

There is a DB with the table, it would be desirable to implement user input of the data in this table. Is there an example of implementation via activeform? I don't want to write crutches.
It's not spelled out in great detail.
https://github.com/yiisoft/yii2/blob/master/docs/g...
Is there a more detailed example somewhere?