Mini-plugin to add an additional Google Analytics tracking code to web stories

web-stories-auto-analytics.php

<?php
/**
 * Plugin Name: Web Stories Additional GA Tracking
 * Description: Mini-plugin to add an additional Google Analytics tracking code to web stories
 * Plugin URI: https://wp.stories.google/
 * Author: Pascal Birchler, Google
 * Author URI: https://opensource.google.com/
 * Version: 0.0.1
 * License: Apache License 2.0
 * License URI: https://www.apache.org/licenses/LICENSE-2.0
 */

 // SEE https://amp.dev/documentation/components/amp-pixel/
add_action(
	'web_stories_print_analytics',
	static function () {
		// TODO: REPLACE WITH YOUR OWN GOOGLE ANALYTICS MEASUREMENT ID.
	        $tracking_id = 'G-12345';
		?>
		<amp-story-auto-analytics gtag-id="<?php echo esc_attr( $tracking_id ); ?>"></amp-story-auto-analytics>
		<?php
	}
);

In case someone stumbles upon this and would like to disable Site Kit's analytics output on stories (so that you can add a separate one using this plugin here), you can do so using the following filter:

add_filter( 'googlesitekit_analytics-4_tag_amp_blocked', static function( $blocked ) { if ( is_singular( 'web-story' ) ) { return true; } return $blocked; } );