instruments, $instrument);
}
public function remove(AbstractInstrument & $instrument) {
array_pop($this->instruments);
}
public function hasChildren() {
return (bool)(count($this->instruments) > 0);
}
public function getChild($i) {
return $instruments[i];
}
public function getDescription() {
echo "- one " . $this->getName();
if ($this->hasChildren()) {
echo " which includes:
";
foreach($this->instruments as $instrument) {
echo "| | -";
$instrument->getDescription();
echo " |
";
}
}
}
public function setName($name) {
$this->name = $name;
}
public function getName() {
return $this->name;
}
public function setCategory($category) {
$this->category = $category;
}
public function getCategory() {
return $this->category;
}
}
class Guitar extends AbstractInstrument {
function __construct($name) {
parent::setName($name);
parent::setCategory("guitars");
}
}
class DrumSet extends AbstractInstrument {
function __construct($name) {
parent::setName($name);
parent::setCategory("drums");
}
}
class SnareDrum extends AbstractInstrument {
function __construct($name) {
parent::setName($name);
parent::setCategory("snare drums");
}
}
class BaseDrum extends AbstractInstrument {
function __construct($name) {
parent::setName($name);
parent::setCategory("base drums");
}
}
class Cymbal extends AbstractInstrument {
function __construct($name) {
parent::setName($name);
parent::setCategory("cymbals");
}
}
$drums = new DrumSet("tama maple set");
$drums->add(new SnareDrum("snare drum"));
$drums->add(new BaseDrum("large bass drum"));
$cymbals = new Cymbal("zildjian cymbal set");
$cymbals->add(new Cymbal("small crash"));
$cymbals->add(new Cymbal("large high hat"));
$drums->add($cymbals);
$guitar = new Guitar("gibson les paul");
echo "List of Instruments: ";
$drums->getDescription();
$guitar->getDescription();
?>