opens.php

<?php

$cid = $this->data['reader_id'] . '.' . $this->data['reader_id'];
$view->trackingOpensUrl = 'http://www.google-analytics.com/collect?' . http_build_query(
	[
		'v'   => '1',
		'cid' => $cid,
		'tid' => 'UA-1113296-75',
		'uid' => $this->data['reader_id'],
		't'   => 'event',
		'ec'  => 'email',
		'ea'  => 'open',
		'el'  => $campaignName,
		'cs'  => 'newsletter',
		'cm'  => 'email',
		'cn'  => $campaignName,
		'cc'  => 'open',
	    'ni'  => '1',
	]
);