I'm starter with web services (and practically in web development) and I'd like to connect my Android app with a web server. I have readed that the best way for doing that is implementing a REST+JSON server. I have no full control over the server (just a control panel) and is no dedicated for me. I had thought implementing that with PHP. Is ok? If yes, should I manually pharse the JSON chains of text or there are any library for simplify this step? Thanks in advance
In PHP there are a few libraries for creating/using JSON. This link has a nice comparison of many of these popular libraries.
Android has native support for JSON. Here is the package with the pertinent classes.
For PHP you only need to know json_encode() and json_decode() this will turn an array into JSON and vice-versa.
And as per @nicholas Android has native support.
I have a well-used REST class that I can give you too if needed.