QR code with unique numbering

[Ihsaan]

I intend printing 10 business cards each one having a QR code that link to a webpabe. The QR code will point to www.test.com/qr?12345 where 12345 is the unique number with each business card.  On the webpage there will be an input box and that input box should automatically have the unique number it it. Im trying to wrap my mind around how this will work and how to code it... Any suggestions welcome

[QuickOldCar]

I think the best thing to do would be to use mysqls built in autoincrement for id's

 

but if you wanted to, you can assign them qr codes by using an md5 of uniqid()

 

$qr_code = md5(uniqid(rand(), true));

 

Save that $qr_code value into that users account so it links their info to that code

[Ihsaan]

Thanks QuickOldCar but im more interested to know how to get the code from the url into the input box

[Jessica]

<?php
echo '<input type="text" name="code" value="'.$_GET['qr'].'">';
?>

Assuming you do all the proper error checking to make sure it's set first, etc.

 

Edit: Unless the URL query string is actually just ?12345

 

In which case

$qr = array_shift(array_keys($_GET));

Then use as above. Edited May 16, 2013 by Jessica

[Ihsaan]

Thanks Jessica, will try it out and let you know