function logar()
{
$f = array();
$f['usuario'] = $_POST['usuario'];
$f['senha'] = $_POST['senha'];
$fdao = new cliente_dao();
$resp = $fdao->logar($f);
if ($resp != null) {
Header("Location: ../area_do_cliente.php?nav=projetos");
} else {
Header("Location: ../login.php?exist=false");
}
}