Hello,
1)In the top menu, hover over Site and click Global Configuration
2)You will see 5 tabs: System Information, PHP Settings, Configuration File, Directory Permissions, and PHP Information. Click the PHP Information tab.
3)Scroll down the list of php settings until you find the Loaded Configuration File setting. The Loaded Configuration File will show the path to the php.ini file your Joomla website is using.
Thanks,
OrdaSoft team