$ sudo apt-get update
$ sudo apt-get install libzend-framework-zendx-php 

libzend-framework-zendx-php is installed in your system.

Make ensure the libzend-framework-zendx-php package were installed using the commands given below,

$ sudo dpkg-query -l | grep libzend-framework-zendx-php *

You will get with libzend-framework-zendx-php package name, version, architecture and description in a table

libzend-framework-zendx-php package basic information: