Do php variables affect the seo of a site if they are written in meta tags?

Question

Search Engine Optimization

Is it possible for example to use php variables in the title of the site?
For example Stretch ceilings in <? echo $city; ?> from 4000 rubles
And how does this affect SEO?
There will be the same result as with the text version or the search robot will simply not read it

Answer 1

The search robot will receive an already compiled page, just like the user. So there won't be any impact other than if php doesn't work correctly or throws an error.

Answer 2

This will not affect SEO in any way, but damn it .... The
21st century is in the yard, is it really so difficult to master template engines or build your own, the most simple one?