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Is there a way to only allow traffic from QR codes in?

Discussion in 'Web Design & Development' started by namenotfound, Feb 18, 2013.

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  1. namenotfound

    namenotfound Thread Starter

    Joined:
    Apr 30, 2005
    Messages:
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    So let's say I want to set up a special page that's only accessible from a QR code. So if you were to put example.com/specialpage into your web browser, it would come up blank or have a message saying you need special access. But if you were to scan a QR code that links to that webpage, it would show?

    I'm not talking about detecting a device (because QR codes aren't limited to phones, a desktop computer with a cam and the right software can scan them too), I just want to be able to detect if you're being linked to the site via a QR code. It can't be a special referral link, such as example.com/specialpage?qr because someone could still access the page by entering that in their web browser.

    Is there any way to do what I want, without any loopholes?
     
  2. andythepandy

    andythepandy

    Joined:
    Jul 2, 2006
    Messages:
    379
    I don't think that would be possible, considering that all QR scanners do is decode the URL and then use a browser to go to that address, so I don't think there would be a way to restrict it to only QR codes.

    You could make the URL some long code or something so it's inconvenient to type manually :/
     
  3. NegativeKelvin

    NegativeKelvin

    Joined:
    Apr 11, 2012
    Messages:
    298
    You could use somethings like
    PHP GET, 'if' statements, and 'else' statements, and make it so when you visit

    /pagename.php&code=somesecretcode

    it shows the page, but make it echo something else if it is just /pagename.php or /pagename.php&code=incorrect code
     
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