仅通过QR码访问移动网站？

Question

是否可以仅通过二维码限制对移动网站的访问？

Answer 1

It won't be absolute accuracy, but if you use a query string it should narrow down the results For example : index.php?refer=QR. I would just like to state now that I am by no means experienced with PHP, so please don't hit me too hard if I get something wrong ;).

Perhaps you could make it so the QR code redirects to a site and that site generates a key, even something as simple as the date and time. Therefore your query string could be: index.php?refer=QR&c=1215

If the code in the query string doesn't match that of the one currently in use then the person has been linked via direct entry, if it does match then a QR code was used.

Answer 2

The redirecting solution given by @Sam should work well but if user manually types index.php?refer=QR&c=1215 or try to access page from history you may not be able to stop the user.

My solution I, although its bit different, is make an and register it to process the your authority www.something.com . so the next time user scan a qr, android will read it and prompt user to open it in app and app can use WebView to open page without showing the actual url.

Android will redirect user to web browser if your app isn't installed, the way to handle would be to check if it contain's a app specific query parameter say source=app that will be added by app, if not, it will mean its opening from browser and here you can redirect user to install app from store.

Hope this helps...

Answer 3

What you could do is point to a long URL that takes you to a page that sets or creates a cookie that must be set to visit the page.

However, if a user gets hold of the long link they could send it round.

What you could do is a php header to redirect and use htaccess to mask the URL so they don't get the URL.