$ sudo apt-get update
$ sudo apt-get install php-mdb2-driver-mysql 

php-mdb2-driver-mysql is installed in your system.

Make ensure the php-mdb2-driver-mysql package were installed using the commands given below,

$ sudo dpkg-query -l | grep php-mdb2-driver-mysql *

You will get with php-mdb2-driver-mysql package name, version, architecture and description in a table

php-mdb2-driver-mysql package basic information: