View difference between Paste ID: JPW1dyci and RtNQbaRB

 <?php
 // WHEEL CLASSES
 class Wheel {
 	public $id;
 	public $radius;
 	public $grip;
 }
 class WheelMapper {
 	public $pdo;
 
 	public function __constructor($pdo) {
 		$this->pdo = $pdo;
 	}
 
 	public function fetch($wheelCollection) {
 		$result = $this->pdo-> Query table `wheels` where `car_id` = $wheel->id
 	}
 }
-class wheelCollection {
+class WheelCollection {
 
 }
 
 // CAR CLASSES
 class Car {
 	public $id;
 	public $make;
 	public $model;
 	public $wheels;
 
 	public function setId($car_id) {
 		$this->id = $car_id;
 	}
 
 	public function addWheels($wheels) {
 		$this->wheels = $wheels;
 	}
 
 	public function getWheelType() {
 
 	}
 }
 class carMapper {
 	public $pdo;
 
 	public function __constructor($pdo) {
 		$this->pdo = $pdo;
 	}
 
 	public function fetch($car) {
 		$result = $this->pdo-> Query table `cars` where `car_id` = $car->id
 		$car->make = $result['make'];
 		$car->model = $result['model'];
 	}
 }
 
 $car = new Car;
 $car->setId(42);
 $mapper = new CarMapper($pdo);
 if ( $mapper->fetch($car) ) //if there was a car in DB
 {
     $wheels = new WheelCollection;
     $otherMapper = new WheelMapper( $pdo );
 
     $car->addWheels( $wheels );
 
     $wheels->setType($car->getWheelType());
     // I am not a mechanic. There is probably some name for describing
     // wheels that a car can use
     $otherMapper->fetch( $wheels );
 }
 
 ?>