How to translate typed text from Latin to Cyrillic and vice versa?

Question

PHP

The search on the site is done through sphinx
.

Answer 1

decide what will be in the Sphinx, what is the main layout / encoding.
And EVERYTHING - both the initial filling of the Sphinx database and the search query - is converted into this encoding / layout.

Answer 2

I'm just looking in the database for the original string and for the inverted one.

Answer 3

just do it in code without a sphinx.