Because those are not httpd errors, errors from a backend such as when using php-cgi as a backend in a wrapper should be logged in their own php logging, and as you showed php error_log file has not been defined.
El 7 sept. 2017 12:51 a. m., "Анатолий Кирсанов" <kiav1...@mail.ru.invalid> escribió: I am not sure what is the reason of my problem. In some cases my PHP script successfully saves data in it's own (script's) log. But there is no corresponding record in Apache access log. Why? The error log is empty. * mod_fcgid/2.3.9 Apache/2.4.6 (CentOS) PHP 7.1.3 Apache config* <VirtualHost 127.0.0.1:8080> ... CustomLog /var/www/httpd-logs/example.com.access.log combined ErrorLog /var/www/httpd-logs/example.com.error.log ... <FilesMatch "\.ph(p[3-5]?|tml)$"> SetHandler fcgid-script FCGIWrapper /var/www/php-bin-isp-php71/user/php </FilesMatch> ... </VirtualHost> *PHP 7.1 config* error_log empty (not set) log_errors on error_reporting E_CORE_ERROR | E_ERROR | E_COMPILE_ERROR | E_PARSE