pg_affected_rows() returns the number of tuples
(instances/records/rows) affected by
This function used to be called pg_cmdtuples().
$result = pg_query($conn, "INSERT INTO authors VALUES ('Orwell', 2002, 'Animal Farm')");
$cmdtuples = pg_affected_rows($result);
echo $cmdtuples . " tuples are affected.\n";
The above example will output:
1 tuples are affected.