新聞財經娛樂♬資訊 News Economy

What ever is in line 1671 probably needs to be in the first 10 lines or so before any browser output.  If "common.inc.php" is an include file, then what ever it is may need to be in the first part of the main file.

Output buffering is one way that may fix the message, but there may be an underlying problem in the organization of the code.  The message you're seeing usually occurs because there is a logic error that caused a setcookie() or session_start() command to be executed after the output was started.  Sometimes the output can be started by accident.  For an explanation of this, please see HTTP Headers Must Come First, Period in this article:
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/A_11271-Understanding-Client-Server-Protocols-and-Web-Applications.html