chamilo-lms2/main/inc/lib/conditional_login.class.php

<?php
/* For licensing terms, see /license.txt */

/**
 * Conditional login
 * Used to implement the loading of custom pages
 * 2011, Noel Dieschburg <noel@cblue.be>.
 */
class ConditionalLogin
{
    /**
     * Check conditions based in the $login_conditions see conditional_login.php file.
     *
     * @param type $user
     */
    public static function check_conditions($user)
    {
        $file = api_get_path(SYS_CODE_PATH).'auth/conditional_login/conditional_login.php';
        if (file_exists($file)) {
            include_once $file;
            if (isset($login_conditions)) {
                foreach ($login_conditions as $condition) {
                    //If condition fails we redirect to the URL defined by the condition
                    if (isset($condition['conditional_function'])) {
                        $function = $condition['conditional_function'];
                        $result = $function($user);
                        if ($result == false) {
                            $_SESSION['conditional_login']['uid'] = $user['user_id'];
                            $_SESSION['conditional_login']['can_login'] = false;
                            header("Location: ".$condition['url']);
                            exit;
                        }
                    }
                }
            }
        }
    }

    public static function login()
    {
        $_SESSION['conditional_login']['can_login'] = true;
        LoginRedirection::redirect();
    }
}