Why doesn't install PHP7.1-FPM?

Question

PHP

There was a problem out of the blue - php7.1-fpm is not installed on Ubuntu:

sudo apt-get install php7.1-fpm
Reading package lists... Done
Building dependency tree
Reading status information... Done
E: Failed to find package php7.1-fpm
E: Failed to find package using glob "php7.1-fpm »
E: Could not find package using regex "php7.1-fpm"

sudo apt-get install php7.1
Reading package lists... Done
Building dependency tree
Reading status information... Done
E: Failed to find package php7.1
E: Failed to find package using glob "php7.1"
E: Failed to find package using regex "php7.1"

What could be the reason? Any php7.1 installation guides suggest exactly these commands. "sudo apt-get update" of course did.

Answer 1

sudo add-apt-repository ppa:ondrej/php
sudo apt-get update

and put

Answer 2

Does such a package even exist for your version of Ubuntu?
apt-cache search "^php"