This php file takes an Object ID, looks up the appropriate IIIF manifest (json), and returns an image from eMuseum 5.1.
Ex:
http://domain.com/getThumb.php?objectid=10
...returns an image for the object with id=10
This helps provide thumbnails for open-access data sets, where the object id is available, but the active image url is not.
Requires:eMuseum 5.1, IIIF