How do I get a calendar like in the pic attached in my webpage?

Question

I am using PHP on client-side.

Answer 1

Usually datepickers are done with JavaScript, you cannot make dynamic stuff like select next/prev month using PHP only without page reloading on each action.

Here is good list of Javascript datepickers:
http://www.bitrepository.com/a-collection-of-free-javascript-date-pickers.html