Description:
------------
Why exit don't stop execute of PHP script?

Reproduce code:
---------------
class innaklasa
{
    public function __construct()
    {    
        print "inna klasa<br />";
    }
    public function zrob()
    {    
        print "inna klasa zrob<br />";
    }
}
class klasa
{
    public function __construct()
    {        
        print "konstruktor<br />";
    }
    public function __destruct()
    {
        print "destruktor<br />";
        $innaklasa = new innaklasa;
        $innaklasa->zrob();
    }
}
$c = new klasa;
exit;

Expected result:
----------------
konstruktor

Actual result:
--------------
konstruktor
inna klasa
inna klasa zrob