I am using a form to get the hour and minute using post method and then store it to mysql DB.

Such as :

$hour = $_POST['hour'];
$minute = $_POST['minute'];

** There is no need of date, month and year. I just need to store the hour and minute in a column of a table (ex: exam_time)

Column structure: exam_time time NOT NULL

Now how to store these value into database using mktime() function. I tried but it stores 00:00:00, not the one which I am sending via form.