登陆顺利 Warning: Cannot modify header information - headers already sent by (output

登陆成功 Warning: Cannot modify header information - headers already sent by (output
登陆成功
Warning: Cannot modify header information - headers already sent by (output started at D:\52xinju\php\register_login.php:88) in D:\52xinju\php\register_login.php on line 90


这是怎么回事，怎么不自动跳转到首页。。。。高手求救

------解决方案--------------------
1、程序开头加ob_start();
2、用editplus 或者其它的 去掉UTF8-bom 换成 UTF8

以上两个执行一个就OK了