Reload Page.

I have a form which when submitted should display the updates on the page however it doesn't. The data uploads into the database gracefully however it does not show on the page until it is refreshed. I would like to know how to refresh the page after form has been submitted. I tried header but I get an error. Warning: Cannot modify header information - headers already sent by (output started at /Applications/MAMP/htdocs/total/new_car.php:22) in /Applications/MAMP/htdocs/total/new_car.php on line 34 and I have the header set above any html output so that lost me.

I added relavant files here