PHP FPM do not display errors

Question

php5.6-fpm on ubuntu

/etc/php/5.6/fpm/php.ini

display_errors = on
error_reporting = E_ALL

/etc/php/5.6/fpm/pool.d/www.conf

php_flag[display_errors] = on
php_flag[display_startup_errors] = on

Anyway, errors displayed in nginx error log, not in browser output.

Any suggestions appreciated

Answer 1

It was Symfony framework's kernel environment redefining configuration:

$kernel = new AppKernel('prod', false);

Changing it to true solved an issue.