<?php
class Database {
	public $_connection;
	//Store the single instance.
	private static $_instance;


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

		public function __construct() {
		$this-> _connection = new mysqli('localhost' , 'root' , '' , 'rtr');
		if(mysqli_connect_error()) {
		trigger_error('Failure to connect to the database' . mysqli_connect_error(), E_USER_ERROR);
		}
	}

		private function __clone() {}
		public function  getConnection() {
			return this->_connection;
			}

		protected function Connecting() {
		$db = Database::getInstance();
		$mysqli = $db->getConnection();
		$sql_query = 'SELECT * FROM rtrcards';
		$result = $mysqli->query($sql_query);
		}
}



?>