在使用session的时候出来如下错误提示：
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/u114264/include/db_mysql.class.php:1) in /home/u114264/login1.php on line 3
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session-start
在使用session的时候出来如下错误提示：
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/u114264/include/db_mysql.class.php:1) in /home/u114264/login1.php on line 3