Description:
------------
I got Catchable fatal error when I want to pass an object as a __construct method args and assign it to a class property. PHP try to convert my object to string before assignment.  

Reproduce code:
---------------
<?php
require_once '../../RAPI/autoload.php';

class ActionController {
	
	/**
	 * TransactionScript Reference
	 *
	 * @var TransactionScript
	 */
	public $object;
	
	/**
	 * Method name
	 *
	 * @var String
	 */
	public $method;
	
	/**
	 * Method parameters
	 *
	 * @var Array
	 */
	public $params = array();
	
	/**
	 * Response Name
	 *
	 * @var String
	 */
	public $responseName;
	
	/**
	 * @param TransactionScript $object
	 * @param String $method
	 * @param Array $params
	 * @param String $responseName
	 */
	public function __construct(TransactionScript $object, $method, Array $params, $responseName) {
		
		$this->$object  = $object;
		$this->$method  = $method;
		$this->$params  = $params;
		$this->$responseName = $responseName;
		
	}
}

$a = new ActionController(new LongtermAlon(), 'sayHello', array(), 'sname');
echo $a->responseName;
?>

Expected result:
----------------
sname

Actual result:
--------------
Catchable fatal error: Object of class LongtermAlon could not be converted to string in C:\Inetpub\Refah\testArea\ActionController.php on line 42