Excel file with data validation for sheet cells, drop down list and validate whole number, using EasyXLS library! XLS, XLSX, XLSM, XLSB in PHP.
https://www.easyxls.com/manual/tutorials/php/excel-validate-data.html

Create Excel file with name area in sheet using EasyXLS library! XLS, XLSX, XLSM, XLSB files in PHP.
https://www.easyxls.com/manual/tutorials/php/excel-name-area.html

Create Excel file with formula in sheet cells using EasyXLS library! XLS, XLSX, XLSM, XLSB files in PHP.
https://www.easyxls.com/manual/tutorials/php/add-excel-formula.html

Merge cells for Excel file using EasyXLS library! XLS, XLSX, XLSM, XLSB files in PHP.
https://www.easyxls.com/manual/tutorials/php/excel-merge-cells.html

How to set print area, page orientation, paper size or page breaks for Excel file in PHP using EasyXLS Excel library
https://www.easyxls.com/manual/tutorials/php/excel-print-area-page-orientation.html

Create Excel with header & footer in PHP by EasyXLS library! XLS, XLSX, XLSM, XLSB files in PHP.
https://www.easyxls.com/manual/tutorials/php/excel-footer-header.html

Excel cell comment in PHP by EasyXLS library! XLS, XLSX, XLSM, XLSB files in PHP.
https://www.easyxls.com/manual/tutorials/php/excel-cell-comment.html

How to export and protect Excel sheet, data in cells, objects in sheets from PHP using EasyXLS Excel library.

https://www.easyxls.com/manual/tutorials/php/protect-excel-sheet-cells.html

Export data to CSV file in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6 and more, ASP.NET, MVC, from datatable or from list!
http://www.easyxls.com/manual/basics/export-to-csv-file-format.html

Export data to HTML file in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6 and more, ASP.NET, MVC, from datatable or from list!
http://www.easyxls.com/manual/basics/export-to-html-file-format.html