Azure Functions vs LambdaPHP: What are the differences?
What is Azure Functions? Listen and react to events across your stack. Azure Functions is an event driven, compute-on-demand experience that extends the existing Azure application platform with capabilities to implement code triggered by events occurring in virtually any Azure or 3rd party service as well as on-premises systems.
What is LambdaPHP? Host any PHP website on AWS Lambda instantly. Host your website on Aws Lambda with full PHP 7 support (i.e. pay by requests instead of paying a fixed monthly hosting fee).
Azure Functions and LambdaPHP belong to "Serverless / Task Processing" category of the tech stack.
LambdaPHP is an open source tool with 446 GitHub stars and 21 GitHub forks. Here's a link to LambdaPHP's open source repository on GitHub.