pg_connect() returns a
connection resource that is needed by other PostgreSQL
functions.
pg_connect() opens a connection
to a PostgreSQL database specified by the connection_string. It returns a
connection resource on success. It returns FALSE if the connection could not be
made. connection_string
should be a quoted string.
If a second call is made to
pg_connect() with the same
connection_string, no new connection will be
established, but instead, the connection resource of the
already opened connection will be returned. You can have
multiple connections to the same database if you use
different connection string.
The old syntax with multiple parameters $conn = pg_connect ("host", "port", "options",
"tty", "dbname") has been deprecated.
See also pg_pconnect(),
pg_close(), pg_host(),
pg_port(), pg_tty(),
pg_options() and pg_dbname().