simple form using bootstrap and php script completely not working

This is a html code for a simple contact form using bootstrap styling and the action linked in form tag to form_check.php I have been hitting my head hard as clicking the submit button doesnt perform any action and gives no output for even the simplest php script.

Heres the html part:

and heres the php script part in its simplest form still it is not working

Please help me out as even clicking the submit button performs no action at all. thanku in advance