It will detect your PHP installation and add the proper Environment Variables for you. If not, you can add as describe on the previous step. (php.ini will be generated in your php installation folder ...

If your browser supports HTML5 file API, you can send files as big as you want. For browsers who does not support HTML5 file API, the limitation come from PHP configuration.

When the form gets submitted our action file "excel-process.php" will get executed and the fields values gets in there in post parameters. In this file code we have included our PHPExcel library file ...