error_log() after fastcgi_finish_request

Question

What is the reason why error_log() is not working after fastcgi_finish_request()?

Also any error thrown by PHP is not written to the log.

setup: ubuntu18.04 + nginx 1.15.6 + php7.2-fpm, the error log is written to /var/log/nginx/error.log

score 1 · Answer 1 · answered Feb 01 '22 at 10:08

This is not a bug, as stated in https://bugs.php.net/bug.php?id=80628

It's expected behavior.

To solve the "problem", there are two options:

set PHP-FPM option "catch_workers_output" to "yes"
set php.ini option "error_log" to log file path (preferably)

score -2 · Answer 2 · answered Jan 11 '19 at 12:33

-2

As stated in the documentation:

This function flushes all response data to the client and finishes the request. This allows for time consuming tasks to be performed without leaving the connection to the client open.

So by finishing the request I assume no code after it will be executed like with die()

answered Jan 11 '19 at 12:33

Code Spirit

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The HTTP request is finished and sent to the client, but the script execution continues, you can do db queries, curl requests, everything... – the_nuts Jan 11 '19 at 13:18
@the_nuts maybe you havnt set the error_log ini setting. – Code Spirit Jan 16 '19 at 11:17

error_log() after fastcgi_finish_request

2 Answers2