As part of a project that I was working on, I learnt about HTTP Strict Transport Security protocol which tells the browser about making future web requests over HTTPS only. So, even if you attempt to use
http://, the browser will force you to use
https:// URLs in the future.
You can enable it by writing this header in your
.htaccess file in your
Header always set Strict-Transport-Security "max-age=31536000" env=HTTPS
Please note that once you enable this protocol, your web application is committed to using SSL i.e. you won't be able to use insecure HTTP for your web application.