9. The MySQL database returns the results of the statements back to the PHP interpreter.
10. The PHP interpreter returns the results of the executed PHP code, along with the results from the MySQL database, to the web server.
11. The web server returns the page to the requesting client, which displays it.
Although it’s helpful to be aware of this process so that you know how the three elements work together, in practice you don’t really need to concern yourself with these details, because it all happens automatically.