Fatal error: Uncaught mysqli_sql_exception: No database selected in /home/orderful/public_html/sales-app/includes/connection.php:4 Stack trace: #0 /home/orderful/public_html/sales-app/includes/connection.php(4): mysqli_select_db() #1 /home/orderful/public_html/sales-app/pages/index.php(2): include('/home/orderful/...') #2 {main} thrown in /home/orderful/public_html/sales-app/includes/connection.php on line 4