private static $Host = HOST;
private static $User = USER;
private static $Pass = PASS;
private static $Dbsa = DBSA;

/** @var PDO */
private static $Connect = null;

/**
 * Conecta com o banco de dados com o pattern singleton.
 * Retorna um objeto PDO!
 */
private static function Conectar() {
    try {
        if (self::$Connect == null):
            $dsn = 'mysql:host=' . self::$Host . ';dbname=' . self::$Dbsa;
            $options = [ PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES UTF8'];
            self::$Connect = new PDO($dsn, self::$User, self::$Pass, $options);
        endif;
    } catch (PDOException $e) {
        PHPErro($e->getCode(), $e->getMessage(), $e->getFile(), $e->getLine());
        die;
    }

    self::$Connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    return self::$Connect;
}

/** Retorna um objeto PDO Singleton Pattern. */
protected static function getConn() {
    return self::Conectar();
}