Description:
------------
I have a class, where are few variables:

function DrawSelectList($list_name, $key1, $key2=false)

and there is a class which calls my function. If there are 3 variables:
$result = $class1 -> DrawSelectList($arg1, $arg2, $arg3)

there is no problem, but if I pass two arguments only, there is a problem:
PHP Fatal error:  Cannot access empty property in C:\project\ast\utility\SelectList.php on line 29

the code of 'SelectList.php' looks like this:

(...)	
while($row = $dao->fetchObject())
	{
		$this->arg1= $row->$key;
		$this->arg2= $row->$pole1;
line 29		$this->arg3= $row->$pole2;
		$this->list= $list_name;
(...)

In PHP 5.0.4 it worked properly.
Sorry for my english.