Having some problems with a few classes I wrote

[RyanMinor]

Hi all. I have a singleton database class that just basically extends PDO. I then created a file called configure.php that will be included on every single page in my small application. In this file, I get the database instance and also instantiate a Site class that returns information about the site, pages, etc. Well, for some reason my Site class is not reading the $database variable that is defined in the configure.php file. I am getting the following error: "Notice: Undefined variable: database in C:\xampp\htdocs\individualbasic\libraries\Site.php on line 30

 

Fatal error: Call to a member function prepare() on a non-object in C:\xampp\htdocs\individualbasic\libraries\Site.php on line 30". Below are my files. Thanks in advance.

 

Database.php

<?php
class Database extends PDO
{

public static $_instance;

public function __construct() {
	try {
		parent::__construct(DB_TYPE . ':host=' . DB_HOST . ';dbname=' . DB_NAME, DB_USER, DB_PASS);
	} catch (PDOException $e) {
		$this->error = $e->getMessage();
	}
}

public static function getInstance() {
	if (!self::$_instance) {
		self::$_instance = new Database();
	}
	return self::$_instance;
}

public function __destruct() {
	// I want to close the connection here.	
}

}

 

Site.php

<?php
class Site
{

/**
 * Checks the validity of the site token with the token in the MinorCorp database.
 */
public function __construct() {
	/*try {
		$query = $database->prepare("SELECT individual_site_url, individual_site_token 
			FROM individual_site 
			WHERE individual_site_url = ? 
				AND individual_site_token = ? 
				AND individual_site_active = 1");
		$result = $query->execute(array(SITE_URL, SITE_TOKEN));
		if (count($result) == 1) {
			return TRUE;
		}
		die('Your website is not valid.');
	} catch (Exception $e) {
		echo $e;
	}*/
}

/**
 * Retrieves vital information about each page.
 */
public function page($page) {
	try {
		$query = $database->prepare("SELECT page_title, page_keywords, page_description, page_content, page_image 
			FROM page 
			WHERE page_name = ?");
		$query->execute(array($page));
		return $query->fetch();
	} catch (Exception $e) {
		echo $e;
	}
}

/**
 * Retrieves bottom advertisements from the MinorCorp database.
 */
public function bannerAd() {
	try {

	} catch (Exception $e) {
		echo $e;
	}
}

/**
 * Retrieves vital information about each page.
 */
public function sidebarAd() {
	try {

	} catch (Exception $e) {
		echo $e;
	}
}
}

 

configure.php (This is the file that is included on every page)

<?php
include_once('configuration/configuration.php');

require_once('libraries/Database.php');
$database = Database::getInstance();

require_once('libraries/Site.php');
$site = new Site();

$pageInfo = $site->page($page);
$bottomAd = $site->bannerAd();
$sidebarAd = $site->sidebarAd();

[RyanMinor]

Never mind I think I figured it out. I just went through the principles of variable scope in my head. Sorry for wasting a post.