Nginx not logging PHP errors

You have to add the following to your php-fpm pool configurations:

catch_workers_output = 1

You have to add this line to each defined pool!

I had a similar issue.

I tried deploy phpMyAdmin with php-fpm 7.0 and nginx on CentOS7. Nginx showed me 500.html but there was not errors in any log file. I did all of this

catch_workers_output = 1

and

display_errors = On

Either nginx log or php-fpm log did not contained any error string.

And when I commented this line in nginx.conf I was able to see in browser page things that was wrong.

#    error_page 500 502 503 504 /50x.html;
#    location = /50x.html {
#    }

That was what helped me understand troubles.

php-fpm throws everything in /var/log/php5-fpm.log or similar.

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