On what to write search service?

Question

Search engines

Good afternoon. There was an idea to make your own search service (not on the Internet in general, but on the content on the site). I think about what technologies and PLs can be useful to me. So far I have only counted:
- PHP
- MySQL (or equivalent)
- HTML / JS / CSS (for appearance)
Have you counted correctly? Maybe he took too much? Maybe add something?
Thanks in advance.

Answer 1

Only Sphinx sphinxsearch.com