This method is a simpler alternative to external-dir method.
Step 1 : Log into N99panel. From under N99panel dashboard, click 'VHosts/Websites'
Step 2 : You will see the list of all the VHosts. Please click 'Details/Manage' link against the appropriate VHost/Website
Step 3 : Scroll down to 'Update Other Dirs' option and click the pencil icon against it
Step 4 : Now enter the dir(s) after /home/user/ . Multiple dirs can be entered with each on a newline. Now click 'Update Other Dirs Settings'.
You should now from your PHP scripts be able to access the above dirs.