I could not believe that serialize does not serialize an object inside of an object especially since arrays work and they are an object right?

If I am incorrect please explain.
Thank you



<?
		class test {
				function toString(){
					print "test test test test test";
				}	//toString()
		} //User	

		
		class User {
				var $firstName; //first name
				var $test;	//The type of user  test purposes
				function User ($fn,$obj){
					
					$this->firstName=$fn;		
					$this->test= $obj;
				}	//constructor
				function toString(){
					print "user user user user	";	
				}	
		} //User	


$temp =new user ('aaa',new test());
$temp->toString();
print"<br>";
$temp->test->toString();

$temp2=serialize($temp);
print"<br>$temp2";
$temp3=unserialize($temp2);
print"<br><br><br>";
print(get_class($temp3));
print"<br><br><br>";
$temp3->toString();
print"<br><br><br>";
$temp3->test->toString();