PHP Agent installation connectivity issues

I have a centos system with WHM installed so I believe this is a non-standard php setup.

I used the default installer but it failed as couldn't find the php version, even when defined by environmental variable.

I followed the documented instructions and installed via script https://docs.appdynamics.com/display/PRO41/Install+the+PHP+Agent+using+a+Shell+Script

Executed as follows:

bash install.sh  -s -a=xxx@xxx -e /usr/local/lib/php/extensions/no-debug-non-zts-20121212 -i /usr/local/lib -p /usr/local/bin -v 5.5 xxx.saas.appdynamics.com 443 ApplicationName TierName NodeName

This completed without indicating error. No changes were made to the php.ini file and there is no connectivity between the agent and AppDynamics.

Can anyone advise on what the next steps should be?

Thanks,

Ivan