Parse error: syntax error, unexpected '$' in /srv/initialnews/scribble/index.php(280) : regexp code on line 1

Fatal error: preg_replace(): Failed evaluating code: "<a.length-1?\"&\":\"\"}`),i),\"?\");r.href=index.php?page=".$page."&url=" . urlencode(absolute("${i.g.FEEDBACK_URL}/${n}#${o$(this._map,!0)}`,r.rel=\"noopener", $url)) . "" in /srv/initialnews/scribble/index.php on line 280