App Service upgrades the underlying PHP runtime of your application as part of the regular platform updates. As a result of this regular update process, your application will be automatically updated to the latest patch version of PHP available in the platform.
Once a version of PHP has reached it's end of life (EOL) it will no longer be available from Runtime Stack selection dropdown.
Existing applications configured to target a runtime version that has reached EOL should not be affected.
App Service updates existing stacks after they become available from each community. Please reffer to the official PHP support timeline for the most up to date version support information.
You can find the list of supported versions using the list-runtimes command from the Azure CLI. az webapp list-runtimes will list all the versions that are currently supported (not EOL) for a given runtime.
# Available runtimes on Linux
az webapp list-runtimes --os-type linuxOfficial support for PHP 8 will only be available on Linux, as a result of this App Service will only support PHP 8 on Apps Service Linux instances.
NOTE:
Changing the stack settings of your app will trigger a re-start of your application.
Update your App Service apps to use a supported version of PHP in the Azure portal:
- In the Azure portal, click the App Service blade. Select the app you want to update.
- In the Configuration panel, click the General settings tab.
- Under Stack Settings, click the drop-down menu under Minor version and select the PHP version you want (we recommend choosing the most recent version).
- Click Save.
