问题
Complete error:
Warning (2): Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/trunk/dafe/cake/basics.php:355) [CORE/cake/libs/controller/controller.php, line 743]
As far as I can tell it happens after I try to redirect. I know it's caused by a whitespace but I can't find it anywhere, where does this error tend to be?
EDIT: Forgot to mention, this problem only happens on my Mac, my partner working on windows does not have this issue, redirection works appropriately for him.
回答1:
Two possibilities I know of:
A. You might have some whitespace after the class closing PHP tag ?>.
B. You are trying to echo/ pr() during the processing of the data/ logic (-while it's redirecting, saving to the database, etc)
回答2:
I had this Problem recently myself and searched for Blanks within my Code but didnt't find one. The simple Solution: Deactivated the debug mode (Configure::write(debug,0) and everything worked fine :)
回答3:
I had a similar problem and tried removing white space, flush, etc... but nothing worked until I configured output_buffering to 'on' in my EZ php config interface on cpanel.
来源：https://stackoverflow.com/questions/6756621/cakephp-cannot-modify-header-information-headers-already-sent-by