Does PDFNet support PHP7?

At the time of this post, no.

PDFNet does not provide pre-built PHP bindings, due to the variety of different (incompatible) versions being used.

We do provide the full steps for customers to generate their own PHP bindings, using SWIG.

Unfortunately, at this time SWIG cannot generate PHP7 wrapper.

Great news. Latest version of SWIG, 3.0.11, was released and it now supports PHP7