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I wrote web service which will generate label from certain parameters and will return it as PDF. Now I must improve it by returning generated label as PDF or ZPL format.

Unfortunately, I have zero knowledge on working with ZPL. What is ZPL? Is it some kind of file format? What is used for? How its generated? Any open-source PHP libraries for it?

It would be nice if someone would provide some whitepapers or some kind of reference about ZPL.

Web service is written in PHP.

Adomas Kondrotas
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I think you are looking for this information:

https://en.wikipedia.org/wiki/Zebra_(programming_language)

Slavik Meltser
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