A GEXF PHP Library.
This was created out of necessity to produce Node Maps in the GEXF format for my day-job at FireScope. It's a spare-time repository, so any bugs will be addressed as time allows. And I am no expert on GEXF, so the technical support that I can offer is limited.
This library is a ported evolution of digitalmethodsinitiative/GEXF-library that looks to be no longer maintained. See also their other tools at https://tools.digitalmethods.net.