gettting last assigned key in an array

[jonathan <news_php@xxxxxxxxxxxx>]

i"m mapping some data from a sql select into a custom object that  
will have a couple associative arrays. I have some code that I think  
looks a little ugly such as:

        $x=0;
	if($row['slot']>=2)
	{
	    $this->menu_item[$x]['item_id']=$row['item_id'];
            $this->menu_item[$x]['name']=$row['name'];
	    $this->menu_item[$x]['item_price']=$row['item_price'];
	    $x++;
	}

I'd rather do something like this:
	if($row['slot']>=2)
	{
	    $this->menu_item[]['item_id']=$row['item_id'];
            $y=get_last_key();
            $this->menu_item[$y]['name']=$row['name'];
	    $this->menu_item[$y]['item_price']=$row['item_price'];
	}

but don't know if php has a built in for the "get_last_key()"; any  
thoughts would be appreciated (including whether you think the  
original code snippet is fine.

-jonathan

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