Thank you for your reply.
configuration.php is not equivalent to php.ini. php.ini saves the settings about php for the server, and configuration.php saves the settings for the site (name, db, etc).
using phpinfo function I saw the php.ini location, which is in /opt/alt/php70/etc/php.ini. You are right I can see all folders in /home/<domainName> using file manager, but this path is not there.
attached this message you can see captures of the tree in file manager and of the phpinfo.