Description:
------------
pg_trace does not work.

PHP:4.4.7
PostgreSQL: 8.2.4


Reproduce code:
---------------
$ createdb testdb
$ psql -d testdb
testdb=> create table test_tbl (id serial, val text);

<?php
$dbconn = pg_connect("dbname=testdb");
pg_trace("/tmp/pg_trace.log","w",$dbconn);
$sql = "insert into test_tbl (val) values ('aaaaaaaaaaa')";
$result = pg_query($dbconn, $sql);
var_dump(pg_affected_rows($result));
?>



Expected result:
----------------
something trace information in /tmp/pg_trace.log


Actual result:
--------------
$ cat /tmp/pg_trace.log
$ (empty)