html - why does it is not corresponding based on what permission i set PHP

one text

why does my side menu bar permission does not follow the permission i set in serialized in the database i was trying to develop an restaurant pos and inventory system and i'm using a PHP with a codeigniter framework.

serialized permission in database: here with "viewFile" permission

a:33:{i:0;s:8:"viewFile";i:0;s:10:"createUser";i:1;s:10:"updateUser";i:2;s:8:"viewUser";i:3;s:10:"deleteUser";i:4;s:11:"createGroup";i:5;s:11:"updateGroup";i:6;s:9:"viewGroup";i:7;s:11:"deleteGroup";i:8;s:11:"createStore";i:9;s:11:"updateStore";i:10;s:9:"viewStore";i:11;s:11:"deleteStore";i:12;s:11:"createTable";i:13;s:11:"updateTable";i:14;s:9:"viewTable";i:15;s:11:"deleteTable";i:16;s:14:"createCategory";i:17;s:14:"updateCategory";i:18;s:12:"viewCategory";i:19;s:14:"deleteCategory";i:20;s:13:"createProduct";i:21;s:13:"updateProduct";i:22;s:11:"viewProduct";i:23;s:13:"deleteProduct";i:24;s:11:"createOrder";i:25;s:11:"updateOrder";i:26;s:9:"viewOrder";i:27;s:11:"deleteOrder";i:28;s:10:"viewReport";i:29;s:13:"updateCompany";i:30;s:11:"viewProfile";i:31;s:13:"updateSetting";}

serialized permission in database: here without the "viewfile"

a:32:{i:0;s:10:"createUser";i:1;s:10:"updateUser";i:2;s:8:"viewUser";i:3;s:10:"deleteUser";i:4;s:11:"createGroup";i:5;s:11:"updateGroup";i:6;s:9:"viewGroup";i:7;s:11:"deleteGroup";i:8;s:11:"createStore";i:9;s:11:"updateStore";i:10;s:9:"viewStore";i:11;s:11:"deleteStore";i:12;s:11:"createTable";i:13;s:11:"updateTable";i:14;s:9:"viewTable";i:15;s:11:"deleteTable";i:16;s:14:"createCategory";i:17;s:14:"updateCategory";i:18;s:12:"viewCategory";i:19;s:14:"deleteCategory";i:20;s:13:"createProduct";i:21;s:13:"updateProduct";i:22;s:11:"viewProduct";i:23;s:13:"deleteProduct";i:24;s:11:"createOrder";i:25;s:11:"updateOrder";i:26;s:9:"viewOrder";i:27;s:11:"deleteOrder";i:28;s:10:"viewReport";i:29;s:13:"updateCompany";i:30;s:11:"viewProfile";i:31;s:13:"updateSetting";}

code:

        <?php if(in_array('viewReport', $user_permission)): ?>
        <li class="treeview" id="FileMainNav">
          <a href="#">
            <i class="fa fa-file"></i>
            <span>File Maintanance</span>
            <span class="pull-right-container">
              <i class="fa fa-angle-left pull-right"></i>
            </span>
          </a>
         <?php endif; ?>

so my problem is if the user permission is equal to "viewReport" as i tried as a test it shows the sidebar menu.

but when i make it into "viewFile" it does not show the side bar menu

but i already set the value of viewFile here is some portion of the code:

 <td>File Maintainance</td>
 <td> - </td>
 <td> - </td>
 <td><input type="checkbox" name="permission[]" id="permission" value="viewFile"></td>
 <td> - </td>

and here is the code in my controller:

public function __construct() 
{
    parent::__construct();

    $group_data = array();
    if(empty($this->session->userdata('logged_in'))) {
        $session_data = array('logged_in' => FALSE);
        $this->session->set_userdata($session_data);
    }
    else {
        $user_id = $this->session->userdata('id');
        $this->load->model('model_groups');
        $group_data = $this->model_groups->getUserGroupByUserId($user_id);
        
        $this->data['user_permission'] = unserialize($group_data['permission']);

        $this->permission = unserialize($group_data['permission']);
    }
}

Source