pg_connect in php return false
$dbconn =pg_connect("host=localhost port=5432 dbname=qlbv user=postgres password=123456")
 or die("can't connect db");

# "local" is for Unix domain socket connections only
local  all        all                              md5
# IPv4 local connections:
host    all        all        127.0.0.1/32        md5
# IPv6 local connections:
host    all        all        ::1/128              md5
# IPv4 internet connections:
host    all        all        0.0.0.0/0            md5

# - Connection Settings -
listen_addresses='*'
#listen_addresses = 'localhost'        # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost', '*' = all
                                        # (change requires restart)
port = 5432                            # (change requires restart)

getsebool -a | grep ftp
setsebool -P ftp_home_dir on
getsebool -a | grep ftp