PHP header redirect working in nginx even output sent

Question

note: There is a similar question but that's about Apache.

The following code

<?php echo '.'; header('Location: http://stackoverflow.com'); 

is fully 'working' under nginx 0.7.67 where 'working' means the php redirect is working fine without errors in the error log or displaying the ..

How can i force nginx or php-fpm to throw the PHP Warning: Cannot modify header information - headers already sent by warning?

Answer 1

You should check value of output_buffering parameter in your php.ini file.

php.ini #output-buffering

Answer 2

I had the same problem and I found that it was because a header("Status: 200 OK", false, 200); before the header to redirect. So I added a condition not to display the header 200 if I know that I will have to redirect:

if(!isset($_GET['utm_source'])) { //Header will be Redirect 301 from global_cookies.inc.php header("Status: 200 OK", false, 200); } 

Note: With Apache I had not this problem and could redirect even after a header 200.