Which model to choose for writing CRM?

Question

PHP

There is a task to write crm, quite large (users, work with Ya.metrica and Ya.webmaster through api with my CRM, create reports)
I wanted to start on yii, but I want to make the whole interface on the index, which will receive data via ajax windows. Therefore, I thought that yii would be redundant.
And immediately then the next question: How best to transfer the "window" data via ajax. Form html in php or json to send only data and already create windows based on this data.

Answer 1

I wanted to start on yii, but I want to make the entire interface on the index, which will receive window data via ajax. Therefore, I thought that yii would be redundant.

yii on the back, like api, on the front, some kind of js framework, a standard bundle. For example, cms on angular + yii2: https://github.com/luyadev I don’t think it will suit you, but it will be useful to dig into the code, since core developers yii2 are involved there.