Microsoft's participation is part of an effort to encourage PHP developers to target the Azure cloud, said Vijay Rajapalan, principle architect for the Microsoft interoperability team. He noted the current implementation of Simple Cloud API is PHP-specific.
Although Amazon has not committed to supporting Simple Cloud API, Amazon's cloud is being supported through community contributions, Sinclair said. Discussions are ongoing with Amazon, he said.
An initial Simple Cloud API proposal and reference implementation is available at the company's Web page. Developers can evaluate the API by deploying applications that use it on the Amazon cloud using the free Zend Server Community Edition Amazon Machine Image (AMI) for EC2. A commercially supported Zend Server AMI also is being offered.
A technology preview of PHP client libraries for Windows Azure is downloadable.
Zend anticipates revenue-generating opportunities from the API through selling support services for Zend Framework and boosting opportunities for its other products.