1.php-excel
php-excel is a very simple library for generating excel documents from php on-the-fly.
http://www.phpstudy.net/codes/24319.html
2.PHPExcel
Project providing a set of classes for the PHP programming language, which allow you to write to and read from different file formats, like Excel 2007, PDF, HTML, ... This project is built around Microsoft's OpenXML standard and PHP.
http://www.phpstudy.net/codes/24320.html