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System V IPC family

PHP has a wrapper for System V IPC family of functions including semaphores, shared memory and inter-process messaging. For more details, visit the official documentation.

Our PHP runtime provides these features out of the box, so you can immediately start using them on App Engine flexible environment. We'll walk through a small demo app to learn how to use them.

Prerequisites

  1. Create a project in the Google Cloud Platform Console.
  2. Enable billing for your project.
  3. Install the Google Cloud SDK.

Simple counter with the shared memory

  1. Create a directory

    mkdir myapp
    cd myapp
    
  2. Create an app.yaml file:

    runtime: php
    env: flex
    
    manual_scaling:
        instances: 1
    
  3. Create an index.php file:

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