Is there a library I can use my C# (my option because this language is feasible-useable in most platforms; it truly outperforms C++ and Java, up to 85-90% : just personal % but self reliable) with PHP ? I am new to PHP, just don't know what to do with it until I'm commanded.
Sorry, i mean to setups to display in browsers, and to use in database,.
If you mean integrating C# libraries with PHP, yes, you can.
PHP happens to have a rarely-used COM library. I'm fairly sure it's what you're looking for.
http://php.net/manual/en/book.com.php
However, consider simply learning either ASP.NET (C#-like) or PHP itself. Combining two languages is almost never a good idea.
CAVEAT: I have not used PeachPie or Phalanger at all.
Depending on your requirements, one approach is to bring PHP into the .NET environment.
See PeachPie.
PeachPie is based on Phalanger compiler
NOTE: As in all attempts to combine different technologies, expect to have to learn some of both environments, to be productive. And expect to bump into annoying problems, limitations, and bugs that wouldn't be an issue if only using one of the two.
Also consider: when you encounter a problem, it may be harder to find a solution:
Many people use php. Many people use c#. Only a tiny fraction of those people try to combine the two.