如何获取我的网页中附带的图片中的日历？

enter image description here

I am using PHP on client-side.

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