How to create a common function in codeigniter for checking if session exist?

codeigniter, function, php, session

Solution

You want a helper function, here it is:

if ( ! function_exists('sessionExist'))
{
    function sessionExist(){
        $CI =& get_instance();
        return (bool) $CI->session->userdata('userId');
    }
}

Save the file in `application/helpers/` and include it your `application/config/autoload.php` file:

$autoload['helper'] = array('my_helper_file');

Problem

I am creating an application where in users have to login to access various modules. I need to check if the user session exist before providing access to each module. Now I am checking session like this in each function / module / controller to avoid unauthorized access. ``` if($this->session->userdata('userId')!=''){ do something; } ``` Is there a better way to do this? can I have common function similar like ``` sessionExist(); ``` such that it can be called from any module / controller / function which is common to the whole project? If so where should I write this common function such that it can be called from anywhere.

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