PHP - Moved: What Actually Happens After Php Interpreter Parses Code?

Hi guys, to compliment my ORM.

On the multiple choice sheets which are scanned into images and then interpreted with the OMR thier is a barcode (like the ones on stuff you buy from the shops), this barcode contains digits to decide the layout of the sheet and how to run the OMR. How can I get PHP to read and understand the barcode. The barcode is originally generated by PHP and now I need PHP to read it and convert to numbers which then I run against mySQL db to enable the OMR to read correctly.

If anyone can suggest a script or method or even a different way to tackle the issue it would be greatly appreciated. Thanks in advance.

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