If a slave site use the master configuration.php, this can be either due to:
- mispelling the domain name (case sensitive) or missing www and without www domain name
- error when saving the slave site definition. You need to have a success (blue or green message) depending on the joomla version
When you create a slave using the "replicMasterSubdir", the configuration.php is normally stored in the subdirectory.
So if the slave site ID = slave1
then you URL is
www.<your domain>/slave1
and the configuration.php is located in the <root directory>/slave1/configuration.php
If you don't have the configuration.php file in the slave1 directory, this could be due to an error in saving the slave site.
You must have the symbolic link functionalities allowed and you should have plenty of symbolic link created in the <root>/slave1 directory
slave1 is a sample.
There is no change to do in multisite php file.
You probably had an error message.