Description:
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Warning: pg_affected_rows(): Not supported under this build

Reproduce code:
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$conn = @pg_connect("<...>");
$result = pg_query($conn, "INSERT INTO settings VALUES (0, 1, 'a', 'b')");
$cmdtuples = pg_affected_rows($result);
echo $cmdtuples . " tuples are affected.\n";


Expected result:
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it prints:

1 tuples are affected

Actual result:
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it prints:

Warning: pg_affected_rows(): Not supported under this build in /www/x.php on line 4 0 tuples are affected.