Enabling HTTP/2.0 with the Apache HTTP Server is a very straight forward process. You simply need to enable the http2 module from a command line.
HTTP/2 is the next generation of the HTTP protocol, and it is very useful when you are looking to make use of new features, as well as speed up loading of your pages. The latter is especially true if your page includes a lot of external resources.
1. To install HTTP/2 on your server, all you have to do is run the following command in a terminal:
sudo a2enmod http2
2. Then add the following in: /etc/apache2/apache2.conf:
Protocols h2 http/1.1
3. Finally you may restart the server:
sudo service apache2 restart
Checking if HTTP/2.0 is working
If you are working with PHP, you can easily tell what protocol a request was made with via SERVER_PROTOCOL, in the global $_SERVER variable. For example:
The output should be "HTTP/2.0".