How to handle rows of checkboxes upon form submit?

Let's say I have a PHP script which lists a series of objects for sale at a yard sale, each with a checkbox to the left of the name of the item. If I wanted to have a submit button, and run through the list of items that were checked and act on them, how would I do that? To gain some knowledge, I went into phpMyAdmin and looked at their checkboxes, and I see their code: <input type="checkbox" id="checkbox_row_6" value="apples" name="selected_fld[]"> <input type="checkbox" id="checkbox_row_7" value="oranges" name="selected_fld[]"> <input type="checkbox" id="checkbox_row_8" value="bananas" name="selected_fld[]"> So it looks like they do something with name="select_fld[]", which must be part of the secret to making this work. Any advice is greatly appreciated.