PHP Interfaces eg 02

php-interfaces-eg02.php

/**
 * Class CarA
 */
class CarA implements Automobile {
	protected $specs;

	/**
	 * Constructor
	 *
	 * @param object $specs The object of data defining Car A
	 */
	public function __construct( $specs ) {
		$this->specs = $specs;
	}

	/**
	 * steering_wheel function
	 *
	 * Required by Automobile Interface
	 *
	 * Checks the car specs for what type of steering we have.
	 */
	public function steering_wheel() {
		switch ( $this->specs->steering ) {
			case 'tilt-wheel':
				echo 'The original Tilt Wheel!';
				break;
			case 'adjust-column':
				echo 'Adjustable Steering Column';
				break;
			default:
				echo 'Just another standard steering wheel.';
		}
	}

	/**
	 * wheels function
	 *
	 * Required by Automobile interface
	 *
	 * Checks the car specs for what type of wheels we have.
	 */
	public function wheels() {
		switch ( $this->specs->wheels ) {
			case 'mag':
				echo 'Mag Wheels';
				break;
			case 'chrome':
				echo 'Chrome Wheels';
				break;
			default:
				echo 'Alloy Wheels';
				break;
		}
	}

	/**
	 * floor-mats function
	 *
	 * This is NOT defined by the Automobile interface
	 *
	 * Special method unique to CarA because they need floor mats :)
	 */
	public function floor_mats() {
		echo 'This car has special floor mats!';
	}
}

/**
 * Class CarB
 */
class CarB implements Automobile {
	protected $specs;

	/**
	 * Constructor
	 *
	 * @param object $specs The object of data defining Car A
	 */
	public function __construct( $specs ) {
		$this->specs = $specs;
	}

	/**
	 * steering_wheel function
	 *
	 * Required by Automobile Interface
	 *
	 * Checks the car specs for what type of steering we have.
	 */
	public function steering_wheel() {
		switch ( $this->specs->steering ) {
			case 'tilt-wheel':
				echo 'The original Tilt Wheel!';
				break;
			case 'adjust-column':
				echo 'Adjustable Steering Column';
				break;
			default:
				echo 'Just another standard steering wheel.';
		}
	}

	/**
	 * wheels function
	 *
	 * Required by Automobile interface
	 *
	 * Checks the car specs for what type of wheels we have.
	 */
	public function wheels() {
		switch ( $this->specs->wheels ) {
			case 'mag':
				echo 'Mag Wheels';
				break;
			case 'chrome':
				echo 'Chrome Wheels';
				break;
			default:
				echo 'Alloy Wheels';
				break;
		}
	}

	/**
	 * hatch_back function
	 *
	 * This is NOT defined by the Automobile interface
	 *
	 * Special method unique to CarA because hatch backs rock :)
	 */
	public function hatch_back() {
		echo 'More space for your stuff, it\'s got a hatch back!';
	}
}