age = 0;
$this->weight = 100;
}
// define methods
public function eat($units) {
echo $this->name." is eating ".$units." units of food...
";
$this->weight += $units;
}
public function run() {
echo $this->name." is running...
";
}
public function kill() {
echo $this->name." is killing prey...
";
}
public function sleep() {
echo $this->name." is sleeping...
";
}
}
// extended class definition
class PolarBear extends Bear {
// constructor
public function __construct() {
parent::__construct();
$this->colour = "white";
$this->weight = 600;
}
// define methods
public function swim() {
echo $this->name." is swimming...
";
}
}
// extended class definition
class GrizzlyBear extends Bear {
// constructor
public function __construct() {
parent::__construct();
$this->colour = "gray";
$this->weight = 800;
}
// define methods
public function roars() {
return true;
}
}
$bear = new Bear();
$bear->name = "Yogi";
echo "";
var_dump($bear);
echo "
";
$bear->run();
$bear->kill();
$bear->sleep();
$bear->eat(100);
echo $bear->name." now weighs ".$bear->weight;
$polar_bear = new PolarBear();
$polar_bear->name = "Nanuk";
echo "";
var_dump($polar_bear);
echo "
";
$polar_bear->swim();
$grizzly_bear = new GrizzlyBear();
$grizzly_bear->name = "Kodiak";
echo "";
var_dump($grizzly_bear);
echo "
";
echo $grizzly_bear->name;
if ($grizzly_bear->roars()) {
echo " is roaring...
";
} else {
echo " is NOT roaring...
";
}
?>