chamilo / chamilo-lms

    // 1. Check if mandatory fields are set.

    $mandatory_fields = array('id', 'parent_id', 'name');

    foreach ($skills as $index => $skill) {

        foreach ($mandatory_fields as $field) {

            if (empty($skill[$field])) {

                $skill['error'] = get_lang(ucfirst($field).'Mandatory');

                $errors[] = $skill;

            }

        }

        // 2. Check skill ID is not empty

        if (!isset($skill['id']) || empty($skill['id'])) {

            $skill['error'] = get_lang('SkillImportNoID');

    $usergroup = new UserGroup();

    foreach ($users as $user) {

        foreach ($mandatory_fields as $field) {

            if (empty($user[$field])) {

                $user['error'] = get_lang($field.'Mandatory');

                $errors[] = $user;

            }

        }

        $username = $user['UserName'];

        // 2. Check username, first, check whether it is empty.

        if (!UserManager::is_username_empty($username)) {

    $usergroup = new UserGroup();

    foreach ($users as $user) {

        foreach ($mandatory_fields as $field) {

            if (isset($user[$field])) {

                if (empty($user[$field])) {

                    $user['error'] = get_lang($field.'Mandatory');

                    $errors[] = $user;

                }

            }

        }

        // 2. Check username, first, check whether it is empty.

        // 1. Check whether mandatory fields are set.

        $mandatory_fields = array ('Code', 'Title', 'CourseCategory');

        foreach ($mandatory_fields as $field) {

            if (empty($course[$field])) {

                $course['error'] = get_lang($field.'Mandatory');

                $errors[] = $course;

            }

        }

        // 2. Check current course code.

        if (!empty($course['Code'])) {