How to control sessions in codeigniter?

@raphael_tillman 

In CodeIgniter, sessions can be controlled using the session library provided by the framework. Here are some steps to control sessions in CodeIgniter:

1. Load the session library: First, you need to load the session library in your controller or autoload it so that you can access the session data.

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$this->load->library('session');

1. Start the session: Before you can use the session, you need to start it in your controller. This can be done in the constructor or in a specific method where you want to start the session.

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$this->session->start();

1. Set session data: You can set session data using the set_userdata() method. This method takes an associative array with the data you want to store in the session.

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$this->session->set_userdata('user_id', 123);

1. Get session data: You can retrieve session data using the userdata() method. This method takes the key of the data you want to retrieve.

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$user_id = $this->session->userdata('user_id');

1. Remove session data: You can remove session data using the unset_userdata() method. This method takes the key of the data you want to remove.

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$this->session->unset_userdata('user_id');

1. Destroy the session: You can destroy the session completely using the sess_destroy() method. This will remove all session data and destroy the session cookie.

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$this->session->sess_destroy();

By following these steps, you can control sessions in CodeIgniter effectively and securely.