Laravel Barcode Generate and Show

I have a field in my database in which I store EAN-13 type of Barcode and then showing it using the Laravel 5 Barcode Generator by Milon. Because of the one last digit that is random in this type of barcodes, I am able to use only 12 digits barcode and the last one is random, if I try to use 13 digits, it returns and error that I should use 12. Anyway, the problem is that in the database the barcode has 12 digits, when you scan it, returns 13. So, how am I supposed to compare them so I can check items by barcode? or I'm doing this the wrong way with the barcode?

via Chebli Mohamed