Янулов, вот так устроит?
$file = str_replace('<?xml version="1.0" encoding="UTF-8"?>', '',$file);
$file = preg_replace('/<br\/>---<br\/>(.*?)<\/html>/si','',$file);
$file = preg_replace('/<!DOCTYPE(.*?)<\/head>/si','',$file);
Янулов, вот так устроит?
$file = str_replace('<?xml version="1.0" encoding="UTF-8"?>', '',$file);
$file = preg_replace('/<br\/>---<br\/>(.*?)<\/html>/si','',$file);
$file = preg_replace('/<!DOCTYPE(.*?)<\/head>/si','',$file);