Notice: Trying to get property 'num_rows' of non-object in /var/www/volggasu/data/www/vestnik.vgasu.ru/include/connection.php on line 33

Fatal error: Uncaught Error: Call to a member function free() on bool in /var/www/volggasu/data/www/vestnik.vgasu.ru/include/connection.php:37 Stack trace: #0 /var/www/volggasu/data/www/vestnik.vgasu.ru/index.php(61): get_value_after_execute(Object(mysqli), 'SELECT `number`...') #1 {main} thrown in /var/www/volggasu/data/www/vestnik.vgasu.ru/include/connection.php on line 37