回声变量返回0数组

Question

我尝试从数据库进行动态菜单导航，但是变量$resCSM在<?php if($sm['dd'] == 1) ;?>之后不能通过，而是给了我array（0）{}。但是当我尝试在其之前进行销售时，$resCSM返回我想要的值。

这是代码：

<?php
        $role_id = $this->session->userdata('role_id');
        $queryM = "SELECT `menu`.`id`,`nmmenu`
                  FROM `menu` JOIN `us_access`
                  ON `menu`.`id` = `us_access`.`mid`
                  WHERE `us_access`.`ri` = $role_id
                  ORDER BY `us_access`.`mid` ASC
            ";
        $menu = $this->db->query($queryM)->result_array();

        ?>

        <?php foreach ($menu as $m) : ?>
            <div class="sidebar-heading">
                <?= $m['nmmenu']; ?>
            </div>

            <?php
            $querySM = "SELECT `smenu`.* , `sm_us_access`.*
                        FROM `smenu` JOIN  `sm_us_access`
                        ON `smenu`.`id` = `sm_us_access`.`smid`
                        WHERE `smenu`.`m_id` = {$m['id']} 
                        AND `smenu`.`is_active` = 1 AND `sm_us_access`.`ri` = $role_id AND `sm_us_access`.`r` =1
                        ORDER BY `smenu`.`id` ASC ";

            $resSM = $this->db->query($querySM)->result_array();
            ?>

            <?php foreach ($resSM as $sm) : ?>
                <?php
                $queryCSM = "SELECT `csmenu`.*, `smenu`.*
                        FROM `csmenu` JOIN `smenu`
                        ON `csmenu`.`smid` = `smenu`.`id`
                        WHERE `csmenu`.`smid` = {$sm['id']}
                        ";

                $resCSM = $this->db->query($queryCSM)->result_array();
                ?>
                <?php if ($sm['dd'] == 1) : ?>
                    <?= var_dump($resCSM) ?>
                    <li class="nav-item">
                        <a class="nav-link collapsed" href="#" data-toggle="collapse" data-target="#collapseUtilities" aria-expanded="true" aria-controls="collapseUtilities">
                            <i class="fas fa-fw fa-wrench"></i>
                            <span><?= $sm['tm']; ?></span>
                        </a>

                        <div id="collapseUtilities" class="collapse" aria-labelledby="headingUtilities" data-parent="#accordionSidebar">
                            <div class="bg-white py-2 collapse-inner rounded">
                                <?= var_dump($resCSM) ?>
                                <!-- child submenu -->
                                <?php foreach ($resCSM as $csm) : ?>
                                    <?= var_dump($csm) ?>
                                    <a class="collapse-item" href="utilities-color.html"><?= $csm['nmmenu']; ?></a>
                                <?php endforeach; ?>
                            </div>
                        </div>
                    </li>

                <?php else : ?>
                    <li class="nav-item">
                        <a class="nav-link pb-0 pt-0" href="<?= base_url($sm['url']) ?>">
                            <i class="<?= $sm['icon'] ?>"></i>
                            <span><?= $sm['tm'] ?></span></a>
                    </li>
                <?php endif; ?>
            <?php endforeach; ?>
            <hr class="sidebar-divider mt-2">
        <?php endforeach; ?>

查询没有问题，只是我不知道为什么<?php if($sm['dd'] == 1) ;?>

之后变量不能通过

我希望有人可以帮助我解决此问题