AMP Custom Google Analytics

functions.php

<?php
add_filter( 'amp_post_template_analytics', function ( $analytics ) {
	if ( ! is_array( $analytics ) ) {
		$analytics = array();
	}

	// https://developers.google.com/analytics/devguides/collection/amp-analytics/
	$analytics['xyz-googleanalytics'] = array(
			'type' => 'googleanalytics',
			'attributes' => array(),
			'config_data' => array(
			'vars' => array(
				'account' => 'UA-xxxxxxxx-1',
			),
			'triggers' => array(
				'trackPageview' => array(
					'on' => 'visible',
					'request' => 'pageview',
				),
			),
		),
	);
	return $analytics;
} );
?>