session problem

[eluser]ciGR[/eluser]
I misunderstand what exactly you ask, so if you mean you have problem at this

Code:

if(!$this->forum_model->m_login()){
        echo 'login/mdp est incorrect' ;
    }else
...
...

every time this code runs, the session created from the m_login method, so and if you clean your cookies when you run the if statement, if the user exists in your database the $this->forum_model->m_login returns true.

I suggest you to restrict you model only with database operation and keep input, sessions in your controller.