On the Include Path panel, specify the location of the files that you need to use in the
project but do not need to locate together with the source files.
To add a folder, click Add Folder. The Select Folder(s) dialog box opens.
Select the relevant folders and click Open. You return to the PHP Include Path panel. The
new folder is added to the list.
To navigate through the list, use the buttons Move Up and Move Down.
To remove a folder from the list of included folder, select the folder and click Remove.