$success = TRUE;
if not defined 1 $success = FALSE;
if defined undef $success = FALSE;
if not defined(1) $success = FALSE;
if not defined("defined") $success = FALSE;
$var = 1;
if not defined($var) $success = FALSE;
if defined($undefined) $success = FALSE;
if not defined 2010-01-01 01:01:01 $success = FALSE;
