To install postgresql11 and phppgadmin:
pkg install postgresql11-server
pkg phppgadmindoesn't support postgresql11, it'll remove postgresql11 and install postgresql95, so I used ports to install: lang/php73 databases/php73-pgsql databases/phppgadmin-php73, finally all works well
pkg upgrade, it'll remove postgresql11 and install postgresql95 again, any way to
pkg upgradewithout degrading installed packages?