<?php
class car { 
    private $_marque;  
     
    public function getMarka(){                
         $this->_marque; 
    } 
    public function setMarka($data){       
         return $this->_marque = $data;  
    }
}

$tachka = new car(); 
$tachka->setMarka('Мазда');
echo $tachka->getMarka(); 

    public function getMarka(){                
         $this->_marque; 
    } 

class car { 
    private $_marque;  
     
    public function getMarka(){                
         return $this->_marque; 
    } 
    public function setMarka($data){       
         $this->_marque = $data;  
    }
}

class car { 
    private $_m = array();  
     
    public function __get($name) {
         if(array_key_exists($name, $_m)
            return $this->$_m[$name];
        else
           throw new Expception('no such element');
    } 

    public function __set($name, $data) {       
        $this->_m[$name] = $data;
    }
}

$car = new Car;
$car->brand = 'Mazda';
$car->engine_power = 110;
$car->color = 'Red';

echo $car->brand; // output Mazda
echo $car->engine_power; // 100
echo $car->color; // Red

	/**
	 * Returns the item at the specified offset.
	 * This method is exactly the same as {@link offsetGet}.
	 * @param integer $index the index of the item
	 * @return mixed the item at the index
	 * @throws CException if the index is out of the range
	 */
	public function itemAt($index)
	{
		if(isset($this->_d[$index]))
			return $this->_d[$index];
		elseif($index>=0 && $index<$this->_c) // in case the value is null
			return $this->_d[$index];
		else
			throw new CException(Yii::t('yii','List index "{index}" is out of bound.',
				array('{index}'=>$index)));
	}