Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....excel file path $workbook = new Workbook ( $dataDir . "book1..."book1.xls" ); //Adding a new worksheet to the Workbook object $worksheets...