Emadkhan

I have a Joomla website having one folder for audio files in it and their links are saved in database. Now I want to show two calendars to the user at front end, so that they can choose that from when to from he want to download the audio files? for e.g he can select june-2-2014 in one calendar and august-2-2014 in second calendar, now on clicking download button the files residing between the two specific dates must get archived into one zip file and then start downloading... i have a reference link for creating a zip and downloading the zip :http://coursesweb.net/php-mysql/create-zip-file-archive-php_cs now i am stuck that how to get the selection of user from calendar , save it into the array , and from the array get the files from the folder matching the array indexes and then zip , download them. please tell me how to achieve this task ?