如何解决这个php错误(类CI_DB_mysql_result的对象不能转换为int)

我正在开发Codeigniter上的应用程序，并试图从我的数据库表实现搜索功能。我被这3个错误/警告困住了。

1.(A PHP Error was encountered
Severity: Notice
Message: Undefined index: prtc_search
Filename: controllers/form.php
Line Number: 818)
2.(A PHP Error was encountered
Severity: Notice
Message: Undefined index: prtc_search
Filename: controllers/form.php
Line Number: 818)
3.(A PHP Error was encountered
Severity: Notice
Message: Object of class CI_DB_mysql_result could not be converted to int
Filename: views/prtc_search.php
Line Number: 2)

我使用相同的代码来搜索来自其他数据库表的数据，它工作得很好，没有错误或警告，但是当涉及到这个特定的页面时，相同的代码不工作。如果有人能好心地给我线索或解决方案，我将不胜感激。下面是搜索页面的代码。

//view.php
<?php 
        if ($result==1)
        {
            echo "NO DATA FOUND";
        }
        else
        {?>
    <div class="table">
        <div class="table_header">Edit from the following List of PRTC</div>
        <table >
            <tr>
                <th>ID</th>
                <th>Name</th>
                <th>Country</th>
                <th>Dzongkhag</th>
                <th>Geog</th>
                <th>Village</th>
                <th>Address</th>                
                <th style="color:#FF2525;width:4%;">Edit</th>
            </tr>
        <?php   
                        $i=0;
            foreach($result as $row)
            {
                ?>
                <tr <?php /*if($i%2==0) echo 'style="background-color:#F2DEDE";'; else echo 'style="background-color:#D9EDF7";'; $i++;*/?>>
                    <td style="vertical-align:middle;"><?php echo $row['id']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['name']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['country']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['dzongkhag']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['geog']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['village']; ?></td>
                    <td style="vertical-align:middle;"><?php echo $row['address']; ?></td>                  
                    <td style="ertical-align:middle;">
                    <a href = "<?php echo base_url().'form/prtc_one/'.$row['id']; ?>">
                    <img src="<?php echo base_url();?>images/edit.png" title="Edit"></a>
                    </td>
                </tr>
                <?php
            } 
        }
        ?>
        </table>
        </div>
    </div> 
<!-- <a style="margin-left:2%;margin-top:20%;" href="<?php echo site_url('form/search_expo/'.$searchquery);?>">Export This..<img style="margin:0 !important;" src="<?php echo site_url('images/b_export.png')?>"></a> -->

控制器

//controller
function prtc_one($id)
    {
        $session_user=$this->session->userdata('logged_in');
        if($session_user['ath']=='admin')
        {           
            $data['result']         = $this->search_model->get_prtc_one($id);
            $data['session_user']   = $this->session->userdata('logged_in');
            $datah['title']         = "Sasec | PRTC Edit"; //For Title
                $this->load->view('includes/header',$datah);
                $this->load->view('includes/leftmenu',$data);
                $this->load->view('includes/flag',$data);
                $this->load->view('prtc_edit',$data);
                $this->load->view('includes/footer');
        }   
        else
            {
            echo ' <script type="text/javascript">
                        alert("Access Error....");
                        </script>';
                redirect('login/home');
            }
    }

模型

//model
    function get_prtc_one($id)
        {
            $query=$this->db->get_where('prtc_info',array('id' => $id));
            $query=$query->row_array();
            return $query;

数据库查询

function prtc_search($searchquery)
    {
        $count = 0;
        //Search using id
        $this->db->select('*');
        $this->db->order_by('name ASC');
        $this->db->where("id LIKE '%$searchquery%'");
        $result = $this->db->get('prtc_info');
        if ($result->num_rows() > 0)
        {
            $row = $result->result_array();
            $count = 1;
            return $result;
        }

您的建议或解决方案将不胜感激。谢谢你！控制器

function prtc_search()
    {
        $session_user=$this->session->userdata('logged_in');
        if($session_user['ath']=='admin')
        {
            $list['result'] = $this->search_model->prtc_search($_POST['prtc_search']);
            $list['searchquery']=$_POST['prtc_search'];
            $data['session_user']   = $this->session->userdata('logged_in');
            $datah['title']         = "Sasec | PRTC Search"; //For Title
                    $this->load->view('includes/header',$datah);
                    $this->load->view('includes/leftmenu',$data);
                    $this->load->view('includes/flag',$data);
                    $this->load->view('prtc_search',$list);
                    $this->load->view('includes/footer');
        }
        else{
            echo ' <script type="text/javascript">
                        alert("Access Error....");
                        </script>';
                redirect('login/home');
            }
    }

function prtc_search($searchquery) {
    $count = 0;
    //Search using id
    $this->db->select('*');
    $this->db->like('id', $searchquery);
    $this->db->order_by("name", "asc");
    $result = $this->db->get('prtc_info');
    if ($result->num_rows() > 0) {
        $row = $result->result_array();
        $count = 1;
        return $row;
    } else {
        return 1;
    }
}

function get_prtc_one($id) {
    $query = $this->db->get_where('prtc_info', array('id' => $id));
    if ($query->num_rows() > 0) {
        $result  = $query->row_array();
        return $result;
    } else {
        return 1;
    }
}

if(isset($_POST['prtc_search']))
{
$list['result'] = $this->search_model->prtc_search($_POST['prtc_search']);
$list['searchquery']=$_POST['prtc_search'];
}else{
$list['result']="";
$list['searchquery']="";
}

    //Search using id
    $this->db->select('*');
    $this->db->order_by('name ASC');
    $this->db->where("id LIKE '%$searchquery%'");
    $result = $this->db->get('prtc_info');
    if ($result->num_rows() > 0)
    {
        $row = $result->result_array();
        $count = 1;
        return $result;
    }
    else{
         return NULL;
     }

       if($result != NULL and count($result)){
               //write code for result
       }
       else{
           // No record found
       }