<?php
class Bird
{
	public static $type = 'bird';
	public static function fly($direction = 'around')
	{
		printf("<p>The bird is flying %s.</p>\n", $direction);
	}

	private $name;
	private $breed;
	private $price;

	function __construct($name = 'Anonymous', $breed = 'Unknown', $price = 100)
	{
		$this->name = $name;
		$this->breed = $breed;
		$this->price = $price;
	}

	function setPrice($price)
	{
		$this->price = $price < 0 ? 0 : $price;
	}

	function setName($name)
	{
		$this->name = $name;
	}

	function setBreed($breed)
	{
		$this->breed = $breed;
	}

	function getName()
	{
		return $this->name;
	}

	function getPrice()
	{
		return $this->price;
	}

	function getBreed()
	{
		return $this->breed;
	}

	public function display()
	{
		printf("<p>The %s named '%s' is a %s and costs \$%.2f.</p>\n",
				self::$type, $this->name, $this->breed, $this->price);
	}
}

$aBird = new Bird();
$tweety = new Bird('Tweety', 'Canary');
$tweety->setPrice(24.95);
$polly = new Bird('Polynesia', 'Parrot');
$polly->setPrice(54.95);

$polly->display();
$tweety->display();
$aBird->display();

$magpie = new Bird('Malaysia', 'Magpie', 7.5);

$magpie->display();

$magpie->setPrice(-14.95);
$magpie->display();

Bird::fly();
Bird::fly('South');

$sam = new Bird('Toucan Sam', 'toucan');
$sam->display();


class Employee
{
	const CATEGORY_WORKER = 0;
	const CATEGORY_SUPERVISOR = 1;
	const CATEGORY_MANAGER = 2;

	public static $jobTitles = array('regular worker', 'supervisor', 'manager');
	public static $payRates = array(5, 8.25, 17.5);

	public static function getCategoryInfo($cat)
	{
		printf("<p>A %s makes \$%.2f per hour.</p>\n",
				self::$jobTitles[$cat],
				self::$payRates[$cat]);
	}

	public static function calcGrossPay($hours, $cat)
	{
		return $hours * self::$payRates[$cat];
	}

	private $firstName;
	private $lastName;
	private $id;
	private $category;

	public function __construct($fname, $lname, $id, $cat = self::CATEGORY_WORKER)
	{
		$this->firstName = $fname;
		$this->lastName = $lname;
		$this->id = $id;
		$this->category = $cat;
	}

	public function getFirstName()
	{
		return $this->firstName;
	}

	public function getLastName()
	{
		return $this->firstName;
	}

	public function getId()
	{
		return $this->id;
	}

	public function getCategory()
	{
		return $this->category;
	}

	public function setFirstName($fname)
	{
		$this->firstName = $fname;
	}

	public function setLastName($lname)
	{
		$this->lastName = $lname;
	}

	public function setId($id)
	{
		$this->id = $id;
	}

	public function promote()
	{
		if($this->category < self::CATEGORY_MANAGER)
			$this->category++;
	}

	public function demote()
	{
		if($this->category > self::CATEGORY_WORKER)
			$this->category--;
	}

	public function display()
	{
		printf("<p>%s %s is  Employee #%d, and is a %s making \$%.2f per hour.</p>\n",
				$this->getFirstName(),
				$this->getLastName(),
				$this->getId(),
				self::$jobTitles[$this->getCategory()],
				self::$payRates[$this->getCategory()]);
	}
}

Employee::getCategoryInfo(Employee::CATEGORY_SUPERVISOR);

$bob = new Employee('Bob', 'Smith', 102, Employee::CATEGORY_SUPERVISOR);
$bob->display();

$bob->promote();
$bob->display();

$bob->promote();
$bob->display();

$bob->demote();
$bob->display();

$hours_worked = 35.5;
printf("<p>If %s %s works %.2f hours, he will gross \$%.2f.</p>\n",
		$bob->getFirstName(),
		$bob->getLastName(),
		$hours_worked,
		Employee::calcGrossPay($hours_worked, $bob->getCategory()));


class Parrot extends Bird
{
	public function __construct($name)
	{
		parent::__construct($name, 'parrot', 25);
	}

	public function birdCall()
	{
		printf("<p>%s says: *squawk*</p>\n", $this->getName());
	}
}

$birdie = new Parrot('Birdie');
$birdie->birdCall();
?>