Fatal error: Uncaught TypeError: array_sum(): Argument #1 ($array) must be of type array, null given in /var/www/html/b2c/models/hotel_model.php:725 Stack trace: #0 /var/www/html/b2c/models/hotel_model.php(725): array_sum() #1 /var/www/html/b2c/controllers/general.php(268): Hotel_Model->save_search_data() #2 /var/www/html/system/core/CodeIgniter.php(359): General->pre_hotel_search() #3 /var/www/html/index.php(181): require_once('...') #4 {main} thrown in /var/www/html/b2c/models/hotel_model.php on line 725