Set-Cookie: phpbb2mysql_data=a%3A2%3A%7Bs%3A11%3A%22autologini d%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22userid%22%3Bi%3 A-1%3B%7D;

preg_match('/Set-Cookie:\s+phpbb2mysql_data=([^;]);/i',$body,$cookie1);