CakePHP: Cannot modify header information - headers already sent by

Question

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.

Please look at the "Related" in the right part of the screen — zerkms, Jul 20 '11 at 03:19

Eric · Accepted Answer · 2011-07-20T12:51:16.780

8

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)

edited Jul 20 '11 at 12:51

answered Jul 20 '11 at 03:20

Eric

371
2
11

Whitespace after curly braces has absolutely no effect on this. You are probably thinking of PHP closing tag `?>`. – JJJ Jul 20 '11 at 12:07
@juhana you're right. My mistake. I'll edit it. – Eric Jul 20 '11 at 12:50

score 2 · Answer 2 · answered Dec 20 '12 at 14:43

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 :)

answered Dec 20 '12 at 14:43

Matthias

39
1

1

it's not just blanks that can cause it, it's usually because something has been outputted by the script before the redirection line. – martincarlin87 Dec 20 '12 at 15:06
Simplest solution (y) – Subhan Jun 29 '16 at 22:54
you are talking about temporary solution..it is not sounds good as a developer – Soubhagya Kumar Barik Jun 18 '18 at 09:32

score 1 · Answer 3 · answered Jan 25 '13 at 21:53

1

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.

answered Jan 25 '13 at 21:53

linkgtaylor

123
2
8

CakePHP: Cannot modify header information - headers already sent by

3 Answers3

Linked