Store multiple selection from pagination info into single array
I have a results page from a MySQL query and I have implemented pagination to present data in chunks of 25 per page in a table view (each row => 1 entry).
My problem is that next to each data row, I have a selection checkbox, and if the user clicks on it, he can download the selected entries. This thing worked OK before I employed paginated view, when I presented all data in one page. Now, if I select e.g. 2 entries in page 1, then I jump to page 12 and select another 2 entries, if I click on the "Retrieve" button, I get only the last 2 entries (from the last page visited).
How can I solve this problem? With JS? Can I use PHP only?