How rotate a pdf document using php?

Question

How can I rotate a pdf document using php and linux?

Answer 1

You will have to access the PDF as a binary file then find and adjust the "Rotate" attribute for each page (and possibly the "MediaBox" attribute). I am not aware of any PDF libraries for PHP that allow for this sort of direct manipulation of existing files. This method will not require changing anything about the content of the pages, it just changes the orientation the pages are displayed in by viewers (similar to the EXIF Orientation information in JPEG images).

This snippet of perl should help illustrate what parts of the file you are looking for.