Port?

 What port does the postgresql server listen on. I am
trying to connect using pg_connect from php using port
5432 with the following command:
 $dbconn3 = pg_connect ("host=localhost port=5432
dbname=dbname user=myname password=mypass");

 I get the following:
 Warning: pg_connect(): Unable to connect to
PostgreSQL server: could not connect to server:
Connection refused Is the server running on host
localhost and accepting TCP/IP connections on port
5432? ...

 How do we know the port postgresql is listening on?

Cheers.

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