Interoperability @ Microsoft have just announced today a new bridge for PHP developers to .NET through REST : PHP Toolkit for ADO.NET Data Services. ADO.NET Data Services have been recently added to the .NET Framework, it offer a simple way to expose any sort of data in a RESTful way. The PHP Toolkit for ADO.NET Data Services is an open source project funded by Microsoft and developed by Persistent Systems. The blog post came with a sample demo showing how to run the PHP Toolkit for ADO.NET to create the PHP proxy classes, then to query over the data service and display data.
PHP_ADO_DATA_SERVICEArchitecture

PHP Toolkit for ADO .NET Data Services enables PHP developers to access data services created using ADO .NET Data Services framework. The goal is to provide the similar functionality as .NET library to access and modify the data and its relationship using URIs which points to pieces of data integrated with the web.

Usage require PHP5 installed and configured on the machine where the ADO.NET Data Services toolkit is installed. Download PHP Toolkit for ADO.NET Data Services from codeplex.