record date/time using id barcode

[Keendev]

Hi again,
just need help and advice on my task...since i dont have a real background on barcoding

my task is to create an ID w/ barcodes. and those IDs will be use as clock-in/out upon swipping in the barcode-reader.
So I need to record the date/time into my database.

hope this is possible...

Q: how can I get and record the value?(id number and date-time)

any links and advice would be great.
thanks again.