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 '' at line 1
select * from app_category where category_id =
Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/article.php
Line Number: 74
Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/article.php
Line Number: 76
Severity: Notice
Message: Trying to get property of non-object
Filename: controllers/article.php
Line Number: 77
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 '' at line 1
select * from app_category where category_id =