Using PHPExcel to export to xlsx

Question

I am using PHPEXxcel to export an HTML Table generated using MYSQL and its like this.

Answer 1

Spreadsheets 101

There are many different spreadsheet file formats, each with their own different filename extensions, and that can be sent to a web browser using different mime types. These are described in the PHPExcel documentation, and each has its own different Writer in PHPExcel. You're mismatching two different formats

BIFF Format

• Used by Microsoft Excel between versions 95 and 2003 File

• extension: xls

• PHPEXcel Writer: PHPExcel_Writer_Excel5

• Mime Type: application/vnd.ms-excel

OfficeOpenXML Format

• Used by Microsoft Excel since version 2007

• File extension: xlsx

• PHPEXcel Writer: PHPExcel_Writer_Excel2007

• Mime Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Don't mix and match: if you do, then Excel will (and justifiably) complain. If you want a BIFF file, use PHPExcel's BIFF Writer (Excel5), a file extension of .xls, and the mime type listed above for BIFF Format. If you want an OfficeOpenXML file, then use PHPExcel's Excel2007 Writer, a file extension of .xlsx, and the mime type listed above for OfficeOpenXML.

EDIT

Note that the examples provided with the PHPExcel distribution include 01simple-download-xls.php and 01simple-download-xlsx.php to demonstrate exactly what you want