What type of barcode used for document management system ?

Hi, I'm new to using barcode.... I want to create an online registration in my application, where the user can fill in the form and the application will create a pdf file of the form with the barcode inserted on it. The user then brings the printed form to us and we scan the barcode. After scanning the barcode and verifying the user data, we will proceed to decide whether his/her application is approved or not. I'm using fpdf to create the pdf file and for the barcode, I'm still looking for suitable solution. I don't know what type of barcode I should use for this purpose (I've browsed internet and found out many types of barcodes..e.g 39, 93, ean-13, c128, etc). Has anyone used php and barcode generator with their application ?? Thanks -- View this message in context: http://www.nabble.com/What-type-of-barcode-used-for-document-management-system---tp25289483p25289483.html Sent from the PHP - General mailing list archive at Nabble.com.