Debian 8 & 9

Ondřej Surý also provides PHP 7.0 and 7.1 packages for Debian which can be installed using these commands:

sudo apt-get install apt-transport-https lsb-release ca-certificates
sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
sudo sh -c "echo 'deb https://packages.sury.org/php/ $(lsb_release -sc) main'" >\
 /etc/apt/sources.list.d/php.list
sudo apt-get update
sudo apt-get install php7.0

Up next

Debian 6 & 7