@kosta is correct.

For Ubuntu 14.04

sudo apt-get update;
sudo apt-get install php5-mysql php5-mysql

On Ubuntu 16.04 you would instead use:

sudo apt-get update;
sudo apt-get install php7.0-fpm php7.0-mysql;

hello, I have a vps with ubuntu 14.4 and I want to install php7, but I can’t find it, what can I do? Thanks in advance