How can I create a simple datapicker in PHP?

Starx

if datepicker is what you are asking, here are some help full links for it

http://www.triconsole.com/php/calendar_datepicker.php

http://www.phpclasses.org/package/3338-PHP-Generate-form-input-to-pick-a-calendar-date.html

http://sourceforge.net/projects/phpdatepicker/

http://www.scriptdungeon.com/freephpscript/freescripts725