The PHP Report classes are used to create html report pages from a generic result set array. A result set is any array you can came up with. That usually means the result of a sql query, and normally it is not ready for display. The classes here are used to parse that result using HTML templates. Sometimes you need to process your result before sending it to the user. Think of a shop cart. You have to list products, add columns, multiply one column with another, format the fields, so dates and floats coming from the database or operations dont show up as 8 decimal digits and strange date patterns to the user, etc. All of these and more is be done by this class. Just feed in your result and a HTML template and you will get a nice html page to show to the user.