Excel problem

Hello all, Am pretty new to the world of PHP. And am now stuck. Its like i am displayin the data from a database on to my webpage in the form of tables. but now i also want an option for the user to download the above data into an excel format for the offline use. I dont want to create the excel file for each of the webpage i am displaying as they are all dynamic so there can be many. is there a way so that only if user click the given link at the bottm of the page then only the data is transferred to excel. i.e how to i write the displayed data dynamically to the excel without storing anything on the server. I am able to config the pear:excelwriter but dont know hwo to get it working according to my requirements. please advice. thanks