REST_Controller::_prepare_basic_auth PHP Method

    protected function _prepare_basic_auth()
    {
        // If whitelist is enabled it has the first chance to kick them out
        if ($this->config->item('rest_ip_whitelist_enabled')) {
            $this->_check_whitelist_auth();
        }
        // Returns NULL if the SERVER variables PHP_AUTH_USER and HTTP_AUTHENTICATION don't exist
        $username = $this->input->server('PHP_AUTH_USER');
        $http_auth = $this->input->server('HTTP_AUTHENTICATION');
        $password = NULL;
        if ($username !== NULL) {
            $password = $this->input->server('PHP_AUTH_PW');
        } elseif ($http_auth !== NULL) {
            // If the authentication header is set as basic, then extract the username and password from
            // HTTP_AUTHORIZATION e.g. my_username:my_password. This is passed in the .htaccess file
            if (strpos(strtolower($http_auth), 'basic') === 0) {
                // Search online for HTTP_AUTHORIZATION workaround to explain what this is doing
                list($username, $password) = explode(':', base64_decode(substr($this->input->server('HTTP_AUTHORIZATION'), 6)));
            }
        }
        // Check if the user is logged into the system
        if ($this->_check_login($username, $password) === FALSE) {
            $this->_force_login();
        }
    }