EasyRdf is a PHP library designed to make it easy to consume and produce RDF. It was designed for use in mixed teams of experienced and inexperienced RDF developers. It is written in Object Oriented PHP.
https://blog.maartenballiauw.be/post/2008/03/Reuse-Excel-business-logic-with-PHPExcel.html
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about:
Embedding business logic in Excel and re-using it in PHP is not that hard. The PHPExcel library helps you simplify development: your application logic and business logic is separated. Business logic can be maintained by a business expert or key user in Excel. As an application developer, you can easily pass data in the sheet and make use of PHPExcel's calculation engine.