Ensure That 'PHP version' is the Latest, If Used to Run the Web App

Description:

Periodically newer versions are released for PHP software either due to security flaws or to include additional functionality. Using the latest PHP version for web apps is recommended in order to take advantage of security fixes, if any, and/or additional functionalities of the newer version.

Rationale:

Newer versions may contain security enhancements and additional functionality. Using the latest software version is recommended in order to take advantage of enhancements and new capabilities. With each software installation, organizations need to determine if a given update meets their requirements and also verify the compatibility and support provided for any additional software against the update revision that is selected.

From Azure Console

1. Login to Azure Portal using https://portal.azure.com
2. Go to 'App Services'
3. Click on each App
4. Under 'Settings' section, click on 'Configuration'
5. Click on the 'General settings' pane, ensure that for a 'Stack' of 'PHP' and a 'Major version' of 'PHP 8', that the 'Minor version' is set to the latest available stable release (PHP 8.0, at the time of writing)

NOTE: No action is required If 'PHP version' is set to 'Off' as PHP is not used by your web app.

Using Azure Command Line Interface

To see the list of supported runtimes:

az webapp list-runtimes | grep php

To set latest PHP version for an existing app, run the following command:

az webapp config set --resource-group --name --php-version
.