country state city dropdown in php

Question

Hi! I am new to php and I want to know about country state city drop down populate from database.I searched it for everywhere most of them are used with javascript and some of them are don't work.please help me.
Can someone tell me about this in php
http://www.c-sharpcorner.com/uploadfile/satyapriyanayak/dfgd/
I'll appreciate it.
Thanks for your time!