<?php

class Database
{
	private static $db;

	static function initialize()
	{
		Database::$db = null;		
		Database::$db = new PDO("pgsql:host=127.0.0.1;dbname=cursos", "root", "root");
	}

	static function query($sql)
	{
		return Database::$db->query($sql);
	}
}

?>