Manually login

[blsn]

I would like to use the script in ajax website that loads content without refresh.

I understand that login via post data, means simply logging in via the login form, after the user has submitted his login/password successfully.

Since I use a callback function, I cannot use the above procedure for logging in. I want to perform a manual PHP login by passing the login form parameters to a callback function, e.g. as follows:

$login->loginWithPostData($_POST['user_name'], $_POST['user_password'], $_POST['user_rememberme']);

How to manually login?