title: PDF Crop PHP library
body: <p>Is there a PHP library that allow to crop each page of a PDF document? I start from a PDF file for printing with crop marks, and I would cut the margins outside the crop marks. 
  I have read that it is possible to do with Ghostscript but can someone recommend a library in PHP that can do the same job? 
  The final PDF should keep the same format as the original file and not transform every page in images.</p>