php提示「headers already sent by」是怎么回事?

2015年4月1日 - Warning: Cannot modify header information - headers already sent by (output started at /data/home/。。。/go.php:8) in /data/home/。。。/go.p...

2015年8月19日 - 错误提示: SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login...

2015年6月25日 - 错误提示: SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login...

2011年9月21日 - 错误提示: SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login...

2011年9月21日 - 错误提示: SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login...

在php 里用 header  session_start 有时会出现 headers already sent by ...  错误 这通常是 php.ini中 output_buffering = Off 导致的把值设...

2016年10月21日 - Warning: Cannot modify header information - headers already sent by (output started at /data/home/。。。/go.php:8) in /data/home/。。。/go.p...

2015年6月25日 - 换主机后发生错误 Warning: Cannot modify header information - headers already sent by (output started at /data/home/。。。/go.php:8) in /data...