out of bound error in piwik iRule

I have never used Piwik or Matomo. I think you use Matomo. I updated piwik codes for Matomo. But I 'm not sure if it will work.

google.js (Import to iFile):

<!-- Google Analytics -->
<script>
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', '$static::tracking_id', 'auto');
ga('send', 'pageview');
</script>
<script async src='https://www.google-analytics.com/analytics.js'></script>
<!-- End Google Analytics -->

matomo.js (Import to iFile):

<!-- Matomo -->
<script type="text/javascript">
var _paq = _paq || [];
_paq.push(['trackPageView']);
_paq.push(['enableLinkTracking']);
(function() {
	var u="$static::matomo_url";
	_paq.push(['setTrackerUrl', u+'matomo.php']);
	_paq.push(['setSiteId', {$static::siteid}]);
	var d=document,
		g=d.createElement('script'),
		s=d.getElementsByTagName('script')[0];
	g.;
	g.type='text/javascript';
	g.async=true;
	g.defer=true;
	g.src=u+'matomo.js';
	s.parentNode.insertBefore(g,s);
})();
</script>
<!-- End Matomo Code -->

iRule:

when RULE_INIT {
	set static::tracking_id "Your Google Analytics ID UA-XXXXX-Y"
	set static::siteid "XXXXX"
	set static::matomo_url "https://matomo.url/ (with slash)"
}
 
when HTTP_REQUEST {
	HTTP::header remove "Accept-Encoding"
}
 
when HTTP_RESPONSE {
	if { [HTTP::header Content-Type] contains "text/html" } {
		if { [HTTP::header exists "Content-Length"] } {
			set content_length [HTTP::header "Content-Length"]
		} else {
			set content_length 1000000
		}
		
		if { $content_length > 0 } {
			HTTP::collect $content_length
		}
	}
}
 
when HTTP_RESPONSE_DATA { 
    set search "</head>"
    HTTP::payload replace 0 $content_length [string map [list $search "[subst -nocommands -nobackslashes [ifile get google.js]]</head>"] [HTTP::payload]]
    HTTP::release
}