php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.php:15) in bbs/login.php on line 9 SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login.php:15) in bbs/login.php on line 10 SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login.php:15) in bbs/login.php on line 28 SAE_Warning: Cannot modify header information - headers already sent by (output started at /data1/www/htdocs/345/leank/1/bbs/login.php:15) in bbs/login.php on line 29
1个回答
采纳
PHP的输出顺序
1.打开了php输出缓存: echo,print -> php output_buffring -> server buffering -> browser buffering -> browser display
2.未打开php输出缓存: echo,print -> server buffering -> browser buffering -> browser display
在 PHP 中，不能在header()之前 echo 任何内容，一旦 echo，PHP 会发送已有的 header 内容
setcookie 方法也会发送 header：set-cookie: xxx