A PHP Error was encountered

Severity: Notice

Message: Undefined index: id_akun

Filename: controllers/Logout.php

Line Number: 14

Backtrace:

File: /home/ikax8298/public_html/application/controllers/Logout.php
Line: 14
Function: _error_handler

File: /home/ikax8298/public_html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/ikax8298/public_html/system/core/Exceptions.php:271)

Filename: core/Common.php

Line Number: 570

Backtrace:

File: /home/ikax8298/public_html/application/models/Login_model.php
Line: 38
Function: insert

File: /home/ikax8298/public_html/application/controllers/Logout.php
Line: 15
Function: logoutActivity

File: /home/ikax8298/public_html/index.php
Line: 315
Function: require_once

A Database Error Occurred

Error Number: 1048

Column 'user_id' cannot be null

INSERT INTO `user_activity` (`user_id`, `activity`) VALUES (NULL, 'Log out')

Filename: models/Login_model.php

Line Number: 38