PostgreSQL and PHP

To those of you who use PHP with PostgreSQL,

I'm trying to do a simple select inside a ".php3" script. The php3 script
simply says something like (the linux machine is not turned on so I can't
grab it exactly):

<?php
$database = pg_connect("","","","mydb");
pg_exec($database, "select * from mytable");
echo "whatever"
?>

and all I get is (in the resulting web page):

whatever

In other words, it doesn't print out on the web page the query that I just
made. Now have added the "nobody" web user to the list of authorised people
and I have granted permission for nobody to do anything he likes to mydb.

Other things work however such as the echo command above and the "info" php
command.

Any ideas?

James