Unable to locate the specified class: Session.php in Codeigniter

问题:

The browser:

Unable to locate the specified class: Session.php

This is my Controller:

<?php  class Chat extends CI_Controller {      public function __construct() {          parent::__construct();         $this->load->model('Chat_model');     }      public function index() {          $this->view_data['chat_id'] = 1;         $this->view_data['student_id'] = $this->session->userdata('student_id');         $this->view_data['page_content'] = 'chat';         $this->load->view('chat');     }      public function ajax_addChatMessage() {          $chat_id = $this->input->post('chat_id');         $student_id = $this->input->post('student_id');         $bericht = $this->input->post('chat_id', TRUE);          $this->Chat_model->addChatMessage($chat_id, $student_id, $bericht);     } } 

When I put my model in comment in the parent::__construct(); // $this->load->model('Chat_model'); the error is gone.

This is my Chat_model:

<?php  class Chat_model extends CI_Controller {      public function Chat_model() {         parent::__construct();     }      public function addChatMessage($chat_id, $student_id, $bericht) {          $query = "INSERT INTO tbl_chatberichten (chat_id, student_id, bericht) VALUES (?,?,?)";         $this->db->query($query, array($chat_id, $student_id, $bericht));      }  } 

回答1:

class Chat_model extends CI_Controller 

should be

class Chat_model extends CI_Model 

回答2:

If you use Codeigniter Modular Extensions HMVC this error can occur if you forget to change your class to extend MX_Controller instead of CI_Controller

So in your case you would start your class with:

class Chat extends MX_Controller {} 

Instead of:

class Chat extends CI_Controller {} 

Hope this helps someone who runs into the same issue

回答3:

Add changes into your library configurations in application/config/autoload.php file

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

and in application/config/config.php set the encryption key(any key u like)

$config['encryption_key'] = 'thu23456789#[n,'; 

If you still get same error then copy System/library/Session/Session.php to System/library/ folder, then it should work

回答4:

My solution: Preface: If you don't use hooks, this will not be the solution for you.

I had this same issue, after upgrading to v3.0.6, and I definitely had everything setup correctly, as this is an existing site just being upgraded to v3+. My issue boiled down to hooks that I had loading 'pre-controller'. My hooks worked with v 2.0.X of CodeIgniter, but not with v3+.

If you are loading hooks before the session class is loaded, and your hook has a dependency on the session class, that may be your culprit. Try changing any pre-controller hooks to post-controller, or commenting them out completely to see if that fixes your issue. This is all located in application/config/hooks.php.

回答5:

Change your load library configuration in application/config/autoload.php file

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

In application/config/config.php set the encryption key(any key u like)

  $config['encryption_key'] = 'thu23456789#[n,'; 

回答6:

Add this instead of your Chat controller constructor

 public function __construct() {      parent::__construct();     $this->load->library('session');     $this->load->model('Chat_model'); } 

This loads the session library to your controller so that you can use the methods.

回答7:

Model Extends CI_Model Not CI_Controller class Chat_model extends CI_Model { ............. }

回答8:

In my case the library name and controller class name was same i.e my controller class name was Ajaxer and also my library class name was Ajaxer. I changed my library class name to Ajaxer_lib and its resolved the issue.

回答9:

Modify your library configurations in application/config/autoload.php file

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

Set the encryption key for your applicatiion in application/config/config.php

$config['encryption_key'] = 'sdjfkdjkfj'; 

Copy system/libararies/Session/Session.php to application/libraries/ Rename application/libraries/Session.php to CI_Session.php

Now, CI_Session object will be available through below line

$this->ci_session 

文章来源: Unable to locate the specified class: Session.php in Codeigniter