A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'category_id' of non-object

Filename: controllers/Category.php

Line Number: 23

Backtrace:

File: /home4/joelle/mhhar.com/application/controllers/Category.php
Line: 23
Function: _error_handler

File: /home4/joelle/mhhar.com/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 /home4/joelle/mhhar.com/system/core/Exceptions.php:271)

Filename: core/Common.php

Line Number: 570

Backtrace:

File: /home4/joelle/mhhar.com/application/models/Advertisement_model.php
Line: 141
Function: get

File: /home4/joelle/mhhar.com/application/controllers/Category.php
Line: 23
Function: getCategoryAdvertisements

File: /home4/joelle/mhhar.com/index.php
Line: 315
Function: require_once

A Database Error Occurred

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND `adv_active` = 1 ORDER BY `adv_id` DESC' at line 3

SELECT * FROM `advertise` WHERE `category` = AND `adv_active` = 1 ORDER BY `adv_id` DESC

Filename: models/Advertisement_model.php

Line Number: 141