class GrandFather
{
public function gfAge()
{
return ' age is 80';
}
}
class Father extends GrandFather
{
public function fAge()
{
return ' age is 50';
}
}
class Son extends Father
{
public function sAge()
{
return 'age is 20';
}
public function myHistory()
{
echo "my grand father " . parent::gfAge();
echo "my father " . $this->fAge();
echo "my " . $this->sAge();
}
}
$son = new Son();
$son->myHistory();
