Generate bar code after form submission

Hello.

I'm hosting a big event soon and I'll have participants register using an online form. For my forms I'm using a third party software that handles everything.  

What I'm wanting to do is to generate a "unique code" for each of the people that sign up. I mean, once a user submits a form they would get a Bar code or something similar that they can print, they would then present that code to us the day of the event; this code would allow us to easily identify the person since we would scan it. We have both a bar code scanner and a QR code scanner.

Is there a script or something similar that can accomplish this?  

I hope this makes sense. Thanks for your comments.
Jacko_PintoAsked:
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Joe Winograd, Fellow&MVEConnect With a Mentor DeveloperCommented:
You say that you're using third-party software for the forms that handles everything. I'm sure the third-party will have the skills to generate a unique number for each form...could be as simple as 1 to N. This is a very common thing to do...I'd be stunned if they couldn't do it. I'd also be stunned if they couldn't place each number in a standard bar code font, such as a very popular one called "3 of 9". For example, the form could look something like this:
12345-barcode-3of9The bar code above is actually the number 12345 in the "3 of 9" font (for participant 12345...could be 00001 or 99999 or whatever). If your third-party can't do this, you need a new third-party. :)   Regards, Joe
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Joe Winograd, Fellow&MVEDeveloperCommented:
Easiest thing to do is simply use a bar code font. Generate a unique number for each form (from 1 to N, or whatever range you want to use) and then enter that number with the bar code font. Here are two free ones that I've used...both work well:

http://www.barcodesinc.com/free-barcode-font/
http://www.dafont.com/barcode-font.font

Regards, Joe
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Jacko_PintoAuthor Commented:
Thanks Joe,

I guess now I'm stuck as in how to automatically generate a number for each participant. I guess I could use the ID but then I wouldn't know how to turn that number into a bar code using the font. (Total newbie here)

Thanks for commenting!
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designatedinitializerConnect With a Mentor Commented:
You can use this to generate a QR code:

<?
generateQRwithGoogle($user_email);

function generateQRwithGoogle($input,$widthHeight ='150',$EC_level='L',$margin='0') {
    echo '<img src="http://chart.apis.google.com/chart?chs='.$widthHeight.
'x'.$widthHeight.'&cht=qr&chld='.$EC_level.'|'.$margin.
'&chl='.$input.'" alt="QR code" widthHeight="'.$widthHeight.
'" widthHeight="'.$widthHeight.'"/>';
}
?>

I would use the user email because that will surely be unique and identifies the user.
You can use whatever you want.
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Joe Winograd, Fellow&MVEDeveloperCommented:
A potential problem with using the email address is that not everyone may be willing to divulge it, being concerned about getting buried with marketing emails (aka spam). Also, depending on the demographics of your participants, not everyone may have an email address.
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designatedinitializerCommented:
joe:
...that's irrelevant.
I think it's pretty obvious Jacko_pinto will not use email addresses if his form doesn't require one (!) and thus will go with a serial form number as already suggested...
However, if his form requires an email address that problem is already solved in a much cleaner way.
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