$clName = "M";
var_dump($clName::MYPI);
// okay to use a string containing class name
//var_dump("M"::MYPI); // but not the literal form
echo "-----------------------------\n";
var_dump(P::psf());
// okay to access static method via class
var_dump(P::$psProp);
// okay to access static property via class, but leading $ needed!!
var_dump(P::MYPI);
// okay to access const via class
$clName = "P";
var_dump($clName::MYPI);
// okay to use a string containing class name
echo "-----------------------------\n";
P::f1();
echo "-----------------------------\n";
$m = new M();
$n = new N();
$p = new P(1000);
echo "-----------------------------\n";
$m->b1();
echo "-----------------------------\n";
$n->b1();
echo "-----------------------------\n";
$p->b1();
echo "-----------------------------\n";
// simplified version of static
class Base
{
public function b()
