Notice: Trying to get property 'num_rows' of non-object in /home/dokhan101/public_html/system/db.php on line 107

Fatal error: Uncaught Error: Call to a member function fetch_assoc() on bool in /home/dokhan101/public_html/system/db.php:111 Stack trace: #0 /home/dokhan101/public_html/online.php(13): Db->query('SELECT count(*)...') #1 /home/dokhan101/public_html/main.php(44): include('/home/dokhan101...') #2 /home/dokhan101/public_html/comparison.php(2): require_once('/home/dokhan101...') #3 {main} thrown in /home/dokhan101/public_html/system/db.php on line 111