Open the PDF file directly in the Web page and can modify it with PHP how to implement

Open the PDF file directly in the Web page and can modify it in PHP how to implement?
That is, click on a PDF file, and then open directly in the browser, open and open with the software, you can modify the contents of the PDF file, and then save. is equivalent to the browser as a PDF modifier! How can this be implemented in PHP?

may be the national unit to achieve upload PDF documents, and then through a lot of departments, such!

------Solution--------------------
PDF can be arbitrarily modified, if I am not mistaken, you are in addition to Adobe's modification tools, there are some dedicated, this is not possible. Unless you scan the PDF into text and then modify it and then change it to PDF ...
------Solution--------------------
You use PHP's PDF tool to see if you can parse it out, if you could parse it out, you can control it.
------Solution--------------------
discuss

Reference:

PDF can be arbitrarily modified, if I am not mistaken, you are in addition to Adobe's modification tools, there are some dedicated, this is not possible. Unless you scan the PDF into text and then modify it and then change it to PDF ...

So this is impossible to do with PHP? 、
Well, then I don't understand what our leaders mean, or if I get it wrong, every time I talk to him about it, he's ambiguous, it's so simple, it's not recently, I'm a programmer, I'm talking to someone ...

------Solution--------------------
I think your leadership might be like this, the document generated PDF for each department to browse, and "read" The meaning should be like OA, indicating that a section of this document has been seen

I don't know if I understand, I hope I can help you.
------Solution--------------------
Adobe Acrobat PRO can edit the PDF, but only add annotations stamped with the electronic signature of God horse. This part of the problem is not PHP can be solved, the idea should be in the browser to tune Adobe Acrobat, edit save after uploading the overwrite file. What PHP does is just send and receive. or use Flash to implement an online reader, the content of the edits to the original PDF, the background to receive these changes merged into the PDF.

