yf_form_api class

    public function user_select_box(&$name, &$values, &$extra, &$replace)
    {
        if ( ! ($extra['ajax']['url'] ?? null)) {
            $extra['ajax']['url'] = url($this->URL . __FUNCTION__);
        }
    }

    public function _api_user_select_box($options = null)
    {
        // etc
        $api = _class('api');
        $api->JSON_VULNERABILITY_PROTECTION = false;
        // admin only
        if ( ! main()->ADMIN_ID) {
            return $api->_forbidden();
        }
        $result = [];
        // prepare query
        $db = db()->table('user');
        // limit
        $page_per = 10;
        $page = (int) ($_GET['page'] ?? null);
        $page = $page < 1 ? 1 : $page;
        $offset = ($page - 1) * $page_per;
        $db->limit($page_per, $offset);
        // q
        $q = ($_GET['q'] ?? null);
        $q_int = (int) $q;
        $q_is_int = $q_int > 0;
        // order
        if ($q_is_int) {
            $db->order_by('id');
        } else {
            $db->order_by('name');
        }
        // prepare text fields
        $fields_text = ['name', 'login', 'email', 'first_name', 'last_name', 'nick', 'phone'];
        foreach ($fields_text as $item) {
            $db->where_or($item, 'like', '%' . db()->es_for_builder($q) . '%');
        }
        // prepare int fields
        $fields_int = ['id'];
        if ($q_is_int) {
            foreach ($fields_int as $item) {
                $db->where_or($item, '=', $q_int);
            }
        }
        // prepare select fields
        $fields = array_merge($fields_int, $fields_text);
        $db->select(implode(',', $fields));
        // get db data
        $data = $db->get_all();
        // more?
        $more = count($data) == $page_per;
        // empty
        if ( ! $data) {
            $result = [
                'more' => false,
                'items' => [],
            ];
            return  $result;
        }
        // prepare data
        $fields_json = ['login', 'name', 'email'];
        foreach ($data as $idx => $item) {
            $fields = [];
            foreach ($fields_json as $field) {
                $f = &$item[$field];
                if ( ! empty($f)) {
                    $fields[$f] = $f;
                }
            }
            $fields = empty($fields) ? '' : implode('; ', $fields);
            $result[] = [
                'id' => $item['id'],
                'text' => sprintf('%u: %s', $item['id'], $fields),
            ];
        }
        $result = [
            'more' => $more,
            'items' => $result,
        ];
        return  $result;
    }