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Unable to connect to PostgreSQL server via PHP

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Hi

I'm trying to set up a new webserver running php and pgsql. PHP was connecting to postgres but I needed to install the php-gd module and now I get the error...

"PHP Warning: pg_connect() [<a href='function.pg-connect'>function.pg-connect</a>]: Unable to connect to PostgreSQL server: could not connect to server: Permission denied\n\tIs the server running on host &quot;localhost&quot; and accepting\n\tTCP/IP connections on port 5432?"

.... and I'm at a loss can anyone tell me why it's not connecting?

Thanks

This bit's I know are...
http://xyala.cap.ed.ac.uk/php_info.php  say's php's configured for pgsql

[#@xyala]# telnet localhost 5432
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
Connection closed by foreign host.
[#@xyala]#


[#@xyala]# less /var/lib/pgsql/data/pg_hba.conf
# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD

# "local" is for Unix domain socket connections only
#local   all         all                               ident sameuser
local   all         all                               trust
# IPv4 local connections:
#host    all         all         127.0.0.1/32          ident sameuser
host    all         all         127.0.0.1/32          trust
# IPv6 local connections:
#host    all         all         ::1/128               ident sameuser
host    all         all         ::1/128               trust

[#@xyala]# grep 'listen' /var/lib/pgsql/data/postgresql.conf
# "pg_ctl reload". Some settings, such as listen_address, require
#listen_addresses = 'localhost' # what IP interface(s) to listen on;
listen_addresses = '*'
[#@xyala]#

[#@xyala]# less /etc/php.d/pgsql.ini
; Enable pgsql extension module
extension=pgsql.so

the server I'm going to replace is running the same versions of PHP and postgres http://zeldia.cap.ed.ac.uk/php_info.php The /etc/php.ini files on the two machines are the same and the /var/lib/pgsql/data/postgresql.conf files are only different because I've set listen_addresses = '*' on the new server (xyala) to see if I can make it work.

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