// Hostname or IP address for server. Use '' for UNIX domain
socket.
$conf['servers'][0]['host'] = '';
There you're trying to use "socket" connection (which corresponds to
"local" in pg_hba.conf:
# "local" is for Unix domain socket connections only
local all all ident sameuser
#local all all md5
# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 192.168.1.0/24 trust
#host all all 192.168.1.0/24 password
# IPv6 local connections:
host all all ::1/128 md5
Suggestion: try changing your phppgadmin configuration with
$conf['servers'][0]['host'] = 'localhost'; (to connect via TCP/IP), or
your pg_hba configuration for md5 or your preferred auth method on
local sockets...
