Scrape data from an AJAX site after Login (by PHP)

Please check attached image before bidding. There is a Persian (Farsi) site I need to scrape some data from it. As you can see in the image, the site is like gmail and the page doesn’t refresh by clicks. You need to login before scraping because the site doesn’t display actual data if you are a free visitor. After login, you should click on a page number and get data in files list (html code, array of files or … are ok). I need a PHP function like getdata(pagenumber) to get page number and return the data on that page. I will get username/password to selected bidder.