Error: SQLSTATE[42000]: Syntax error or access violation: 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 published = 1 ORDER BY created_at DESC LIMIT' at line 1 Trace: #0 /var/www/html/app/Controllers/ContentController.php(128): DB::query('SELECT * FROM public_content WHERE category = AND published = 1 ORDER BY created_at DESC LIMIT') #1 /var/www/html/public/index.php(45): ContentController->getContentByCategory(NULL) #2 {main} Query: SELECT * FROM public_content WHERE category = AND published = 1 ORDER BY created_at DESC LIMIT --- End of Error ---