Something

	function get_question($type, $questions)
	{
		global $main, $_SESSION;
		
		$random_question = rand(1, $questions['count']);
		
		while (
			$_SESSION['questions'][$type][$random_question]
		)
		{
			$random_question = rand(1, $questions['count']);	
		}	
		
		return $random_question;
	}