As per coding-style, use === null instead of is_null.
As per coding-style, use === null instead of is_null.

petervanderdoes/AVH-Raritan-Photographic-Society,petervanderdoes/AVH-Raritan-Photographic-Society,petervanderdoes/AVH-Raritan-Photographic-Society,petervanderdoes/AVH-Raritan-Photographic-Society