On the Yii site, are the deleted pages anyway stored somewhere in the database and transferred to the sitemap?

Question

Yii

In general, there is some kind of problem of an incomprehensible nature.
There is a site on Yii, the pages of which are missing and duplicates with a different case get into the sitemap.
Well, that is, there is site.ru/page1 and site.ru/PAGE1, but this does not seem to happen for all pages, and there are also many pages with 404 in the site map. According to the idea, if there is no page, it is also in the site map should not be logically. There is a feeling that pages removed from the admin panel simply disappear from the admin panel but are stored in the database somewhere not in trash, but mixed with normal pages that are present on the site.

I never really worked with Yii. Tell me where to dig and could anyone have something similar?

Answer 1

Work and experiment at a local stand. Make dumps and transfer to the local machine.
1. Watch the output itself. Yii has a wonderful tool - debug panel. Enable and search for the word render. Perhaps, as they said, static is involved. It also helps to search through the code for some static styles, etc.
2. Clear the cache. If the project is advanced, then this is usually the frontend/runtime/cache folder. Clear the folder. Usually the footer and header are wrapped in cache so as not to render every time.