Great to see that Google App Engine and Engine Yard now both support PHP (v5.4) on their cloud platforms too. GAE could use some more loaded extensions, but it’s a good start.
Google App Engine for PHP →
Google App Engine: PHP: Getting Started →
Google App Engine: PHP: Detailed Documentation →
Google App Engine for PHP Blog →
Announcing PHP on Engine Yard Cloud →
Deploy Your PHP Application on Engine Yard Cloud →