index_aula3.php

<?php

class Login{
    private $email;
    private $senha;

    public function getEmail(){
        return $this->email;
    }

    public function getSenha(){
        return $this->senha;
    }

    public function setEmail($e){
        $email = filter_var($e,FILTER_SANITIZE_EMAIL);
        $this->email = $email;
    }

    public function setSenha($e){
        $this->senha = $e;
    }

    public function Logar() {
        if($this->email == "teste@teste.com" and $this->senha == "123456"):
            echo "Logado com sucesso!";
        else:
            echo "Dados inválidos";
        endif;
    }
}

$logar = new Login();
$logar->setEmail("teste@teste.com");
$logar->setSenha("123456");
$logar->Logar();

echo "<br>";
echo $logar->getEmail()."<br>". $logar->getSenha();