PHP-AWS is a collection of PHP classes for working with Amazon's web services platform. Currently, we have classes for use with

• Simple Storage Service (S3)
• Simple Queue Service (SQS)
• Elastic Compute Cloud (EC2)
• Alexa Web Information Service (AWIS)

If you're looking for a super-robust AWS solution in PHP, I'd suggest the Tarzan AWS project. PHP-AWS was a good solution when AWS first launched, but Tarzan is a much more mature and supported project. Still, PHP-AWS is good example code for getting your feet wet with AWS.