if ($unit instanceof Cavalry) {
throw new UnitException("Can't get a horse on the vehicle");
}
parent::addUnit($unit);
}
function bombardStrength()
{
return 0;
}
}
// end previous code
class Army extends CompositeUnit
{
function bombardStrength()
{
$ret = 0;
foreach ($this->units() as $unit) {
$ret += $unit->bombardStrength();
}
return $ret;
}
}
$main_army = new Army();
$main_army->addUnit(new Archer());
$main_army->addUnit(new LaserCanonUnit());
$sub_army = new Army();
$sub_army->addUnit(new Cavalry());
$main_army->addUnit($sub_army);
$main_army->addUnit(new Cavalry());
print $main_army->textDump();
