The tool can handle "PH off" just fine,
the tool produces an error with "SH off":
An error occurred during evaluation of the value "SH open". Please submit a pull request: https://github.com/opening-hours/opening_hours.js. There are no holidays (SH) defined for country us and state Indiana.
The tool can handle "PH off" just fine, the tool produces an error with "SH off":
URL: https://openingh.openstreetmap.de/evaluation_tool/?EXP=SH%20open&lat=39.768&lon=-86.158&mode=0