private function __construct()
{
try {
// assign PDO object to db variable
self::$db = new PDO('mysql:host=' . $this->dbhost . ';dbname=' . dbname, $this->dbusername, $this->dbpassword);
self::$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
// Output error - would normally log this to error file rather than output to user.
echo "Connection Error: " . $e->getMessage();
}
}
public static function close_connection()
{
self::$db = null;
}
public static function disconnect()
{
self::$db = null;
}
