php class Fruit protected mType protected mColor Green public function

<?php
class Fruit
{
    protected $mType = ' ';
    protected $mColor = 'Green';
    public function getType()
    {
        return $this->mType;
    }

    final public function getColor()
    {
        return $this->mColor;
    }
}

final class Apple extends Fruit {
    protected $mType = ' ';
    protected $mColor = 'Red';

    final public function getColor()
    {
        return "Apple:".$this->mColor;
    }
}

$generalFruit = new Fruit();
$myApple = new Apple();
echo $generalFruit->getType().":".$generalFruit->getColor() 
." ".$myApple->getType().":".$myApple->getColor();