Submit form after certain time interval through laravel 5.3

I am developing a time based mock test web application. I need to securely submit form after lets say 5 mins. if i do it with jquery wouldn't it be less secure?? or doing it with php/ laravel functions will make it more secure?? and if there is a way of doing it with php/laravel please guide how to do it. Thanku

via Chebli Mohamed