Accessing a class from another class?

[mbuckner]

I'm trying to use OOP to make a content management system. I have a DB class that makes db connections, runs queries, etc. I have another class called menu that is supposed to query my database (via the db class) and write my menu information on the screen. Among other things, I call the printMenu() function:

function printMenu()
		   {
					$this->getData();

				echo "<ul>";
				while ($row = $this->fetchObject())
				{
				 	  echo "<li>$row->PageName</li>";
				}
				echo "</ul>";		
	   }

This calls getData():

[code=php]
function getData()
		   {
		   			$db = new DB('localhost', 'mark', 'mywebsite', 'hydra_cms');

				$myDb = $db->open();
				if (!myDb)
				{
				   die($db->error());
				}

				$sql = "select PageID, PageName, SiteID, LevelNumber from PageTable where SiteID = '$siteNumber' AND LevelNumber = '$levelNumber' ORDER BY PageName ASC";
				$myResult = $db->query($sql);

				if (!$myResult)
				{
				   die($db->error());
				}
	   }

I get the following error:
Fatal error: Call to undefined function: open() 

What is wrong with this?  How can I get it to work?

Thanks in advance!

[sgoku01]

I think there is something wrong with your error function 😉
Maybe you misspelled it?