Apache, Mysql,PHP log verification in CentOS

Apache
#cd /var/log/httpd
#ls
access_log
error_log

Mysql
#cd /var/log
mysqld.log




php.ini -  /etc/php.ini            // here you know php functionality and details
if you using php 5.4 then you have
php.ini - /opt/rh/php54/root/etc/php.ini