Visually Comparing Rows on a MySQL table

Essentially what I'm looking for is a way to have a person check a box to "compare" each item they are interested in, then be able to load their choices on a single page so they can compare. I have the database set up with the info for each item, I just haven't been able to figure out how to make the script work. Any help would be awesome.
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Comments
Rename or add empty brackets to your checkboxes so its an array: items[].
Process your checkboxes to using something like this:
[PHP]$items = implode(',', $_GET); [/PHP]
Your SQL code needs the "in" operator to return multiple rows.