Illegal string offset codeigniter

问题:

Hi been trying to retrieve records from my database, but I keep getting this error "Severity: Warning Message: Illegal string offset " in several fields.

Here's my controller view_logs.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class View_Logs extends CI_Controller {

function View_Logs()
 {
   parent::__construct();
 }  

function Logs(){
    $id = $this->uri->segment(3);

    $this->load->model('log_listmodel');
    $this->log_listmodel->log_list_get($id);    
}
}
?>

Here's my Model log_listmodel.php

<?php
class Log_Listmodel extends CI_Model{

    function Log_Listmodel()
    {
      parent::__construct();
    }

    function log_list_get($id){
    $query = $this->db->get_where('test_request_log', array('test_request_id' => $id));
    //return $query->result();
    $results=$query->result_array();


    $data['query']=$results[0];
    $this->load->view('logs_list_view',$data);
    }
}
?>

Here's my view page log_list_view.php

<table class="list_header" bgcolor="#ffffff" border="0" width="1020px" cellpadding="4px">

            <?php foreach($query as $row): ?>
            <tr> 
                <td><b>Updated</b></td>
                <td><?php echo $row['id'];?>.</td>
                <td><?php echo $row['new_testing_reason'];?></td>
                <td><?php echo $row['new_applicant_name'];?></td>
                <td><?php echo $row['new_authorizer_name'];?></td>
                <td><?php echo $row['new_received_by'];?></td>
                <td><?php echo $row['new_test_required'];?></td>
                <td><?php echo $row['new_laboratory_number'];?></td>
                <td><?php echo $row['log_date'];?></td>
                <td><?php echo $row['who'];?></td>
            </tr>
            <?php endforeach; ?>
        </table>

回答1:

You've set $data['query'] to the first row of your result, but in the view you're using it as it would have the whole data set.

So you need to change

$data['query']=$results[0];

to

$data['query']=$results;

or

$data['query']=$query->result_array();

回答2:

Your code is kind of unproperly structure, I just reconstruct it and make it simple. Hope it works.

First lets load your database lib.

Go to application/config/autoload.php find this line then autoload database library

/*
| -------------------------------------------------------------------
|  Auto-load Libraries
| -------------------------------------------------------------------
| These are the classes located in the system/libraries folder
| or in your application/libraries folder.
|
| Prototype:
|
|   $autoload['libraries'] = array('database', 'session', 'xmlrpc');
*/

$autoload['libraries'] = array('database');

Controller View

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class View_Logs extends CI_Controller {

function View_Logs()
 {
   parent::__construct();
   $this->load->library('database');   // if you didn`t load 'database' in your autoload.php
   $this->load->model('log_listmodel');
 }  

function Logs(){
    $id = $this->uri->segment(3);


    $data['query'] = $this->log_listmodel->log_list_get($id)->result();

    $this->load->view('logs_list_view',$data);
}
?>

Model View

<?php
class Log_Listmodel extends CI_Model{

    function Log_Listmodel()
    {
      parent::__construct();
    }

    function log_list_get($id){
        return $this->db->get_where('test_request_log', array('test_request_id' => $id));

    }
}
?>

View Mode

<table class="list_header" bgcolor="#ffffff" border="0" width="1020px" cellpadding="4px">

            <?php foreach($query as $row): ?>
            <tr> 
                <td><b>Updated</b></td>
                <td><?php echo $row->id;?>.</td>
                <td><?php echo $row->new_testing_reason;?></td>
                <td><?php echo $row->new_applicant_name;?></td>
                <td><?php echo $row->new_authorizer_name;?></td>
                <td><?php echo $row->new_received_by;?></td>
                <td><?php echo $row->new_test_required;?></td>
                <td><?php echo $row->new_laboratory_number;?></td>
                <td><?php echo $row->log_date;?></td>
                <td><?php echo $row->who;?></td>
            </tr>
            <?php endforeach; ?>
</table>