MarsSeed [1] filed a deletion request for phppgadmin-relhasoids [2]: Broken, abandoned fork from 2019, not developed since that year. [a]
AUR/phppgadmin and its upstream is still actively maintained and it works. [b] [a]: https://github.com/xzilla/phppgadmin/tree/relhasoids [b]: https://aur.archlinux.org/packages/phppgadmin [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/phppgadmin-relhasoids/
