classes confusion

Hi there,

I have used classes in simplified form for a while, but I want to take things a step further to really take advantage of inheritance. I am having trouble accessing members of parent classes, in child classes.

Example:

class siteConfig {

var $foo = "bar";

	function getSettings() {

	// Fill settings array
	return $settings;
	}
}

class dbConnect extends siteConfig {

	function dbConnect() {
	
	$settings = parent::getSettings();
	// connect to database
	}
}

class userSession extends dbConnect {

	// Contains session_start, authentication and session_destroy

}

I cannot seem to figure out how to access var $foo (defined in siteConfig class) in the userSession class. I would like to access some config variables outside the class too, through an instance of the userSession class. I read that a class can only have one parent in PHP, does this mean you cannot stack more than two classes on top of each other?

Thanks for any advice. I apologise if my explanation is a bit vague, that's due to my own confusion.

Ed

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