Customizing the PHP Runtime

You can use custom runtimes to add additional functionality to a PHP app running in the App Engine flexible environment. To configure a custom runtime, replace the following line in your app.yaml file:

runtime: php

with this line:

runtime: custom

You must also specify a base image by adding a Dockerfile in the same directory that contains the app.yaml file.

Visit the Custom runtimes documentation to learn how to define a Dockerfile in a custom runtime.

Health checking

By default, all programs running in the flexible environment receive health check requests. Make sure to write your own code to handle health check request, or disable health checks if needed.