For Writing Excel
- PEAR's PHP_Excel_Writer (xls only)
- php_writeexcel from Bettina
Attack (xls only)
- XLS File Generator commercial and xls only
- Excel Writer for PHP from Sourceforge (spreadsheetML only)
- Ilia Alshanetsky's Excel extension now on github (xls and xlsx, and requires commercial libXL component)
- PHP's COM extension (requires a COM enabled spreadsheet program such as MS Excel or OpenOffice Calc running on the server)
- The Open Office alternative to COM (PUNO) (requires Open Office installed on the server with Java support enabled)
- PHP-Export-Data by Eli Dickinson (Writes SpreadsheetML - the Excel 2003 XML format, and CSV)
- Oliver Schwarz's php-excel (SpreadsheetML)
- Oliver Schwarz's original version of php-excel (SpreadsheetML)
- excel_xml (SpreadsheetML, despite its name)... link reported as broken
- The tiny-but-strong (tbs) project includes the OpenTBS tool for creating OfficeOpenXML documents (OpenDocument and OfficeOpenXML formats)
- SimpleExcel Claims to read and write Microsoft Excel XML / CSV / TSV / HTML / JSON / etc formats
- KoolGrid xls spreadsheets only, but also doc and pdf
- PHP_XLSXWriter OfficeOpenXML
- PHP_XLSXWriter_plus OfficeOpenXML, fork of PHP_XLSXWriter
- php_writeexcel xls only (looks like it's based on PEAR SEW)
- spout OfficeOpenXML (xlsx) and CSV
- Slamdunk/php-excel (xls only) looks like an updated version of the old PEAR Spreadsheet Writer
For Reading Excel
A new C++ Excel extension for PHP, though you'll need to build it yourself, and the docs are pretty sparse when it comes to trying to find out what functionality (I can't even find out from the site what formats it supports, or whether it reads or writes or both.... I'm guessing both) it offers is phpexcellib from SIMITGROUP.
All claim to be faster than PHPExcel from codeplex or from github, but (with the exception of COM, PUNO Ilia's wrapper around libXl and spout) they don't offer both reading and writing, or both xls and xlsx; may no longer be supported; and (while I haven't tested Ilia's extension) only COM and PUNO offers the same degree of control over the created workbook.