We've recently released new versions to Node and PHP on App Service on Linux!
For Node, we have added:
For PHP, we have added:
If you already have an existing web app that you would like to update to the new versions, navigate to the "Application Settings" from the left-hand menu of your web app and select the new version in the "Stack" dropdown.
If you're creating a new web app, check them out in the "Runtime Stack" dropdown.