Implementation Data Encryption Standard (DES) in PHP

I made simple implementation Data Encryption Standard in PHP.

I made the code of this program for graduate school assignment on ITS.

you can check in MY GITHUB for the code.

Keywords : PHP DES, Data Encryption Standard in PHP

To appreciate the IPR (Intellectual Property Rights), reference sources that I use and I have learned will be displayed.
Reference   : https://github.com/sapelord/DES
Author        : Moch. Zawaruddin Abdullah, www.zawaruddin.blogspot.com