// get dynamic property, if one exists; else, fails
echo "dynamic dummy: {$v}\n";
$p->dummy = 987;
// set visible property
$p->__set('dummy', 456);
// set dynamic property
$v = $p->dummy;
// get visible property
echo "dummy: {$v}\n";
$v = $p->__get('dummy');
// get dynamic property
echo "dynamic dummy: {$v}\n";
echo "----------------------\n";
var_dump(isset($p->dummy));
// test if dummy exists and is accessible, or is dynamic
var_dump($p->__isset('dummy'));
// test if dynamic dummy exists
echo "----------------------\n";
$v = $p->x;
// try to get at an invisible property; can't. The runtime sees that x
// exists, but is invisible, so it calls __get to search for a dynamic
// property of that name, which fails. NULL is returned.
var_dump($v);
echo "----------------------\n";
var_dump(isset($p->x));
// test if x exists and is accessible, or is dynamic
var_dump($p->__isset('x'));
// test if x exists and is accessible, or is dynamic
$p->x = 200;
var_dump($p->x);
var_dump(isset($p->x));
