active-campaign-tracking.php

<?php

/*
 *
 * Website tracking for ActiveCampaign
 *
 */
add_filter('wp_head', 'tlc_ac_tracking_email');
function tlc_ac_tracking_email() {

	$email = htmlspecialchars( $_COOKIE['email'] );

	echo '<script type="text/javascript">
	var trackcmp_email = "' . $email . '";
	var trackcmp = document.createElement("script");
	trackcmp.async = true;
	trackcmp.type = "text/javascript";
	trackcmp.src = "//trackcmp.net/visit?actid=YOURACIDHERE&e="+encodeURIComponent(trackcmp_email)+"&r="+encodeURIComponent(document.referrer)+"&u="+encodeURIComponent(window.location.href);
	var trackcmp_s = document.getElementsByTagName("script");
	if (trackcmp_s.length) {
		trackcmp_s[0].parentNode.appendChild(trackcmp);
	} else {
		var trackcmp_h = document.getElementsByTagName("head");
		trackcmp_h.length && trackcmp_h[0].appendChild(trackcmp);
	}
	</script>';
}

?>