function setA($value)
{
self::$a = $value;
}
function getA()
{
return self::$a;
}
function foo()
{
return "statically";
}
}
class K extends M
{
static $a = 10;
function getA()
{
return self::$a;
}
}
$m = new M();
$k = new K();
echo $m->getA();
echo "<br>";
$k->setA(25);
echo $m->getA();
echo "<br>";
echo $k->getA();
echo "<br>";
echo M::foo();