The FPDF library is made up of the following elements: - the main file, fpdf.php, which contains the class - the font definition files located in the font directory The font definition files are necessary as soon as you want to output some text in a document. If they are not accessible, the SetFont() method will produce the following error: FPDF error: Could not include font definition file Remarks: - Only the files corresponding to the fonts actually used are necessary - The tutorials provided in this package are ready to be executed