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    require 'pdflib'

    begin
      # Create a new PDFLib object
      pdf = PDFlib.new

      # Open the PDF file
      pdf.open_pdi_document('path/to/your/pdf/file.pdf', '')

      # Get the number of pages in the PDF file
      page_count = pdf.pcos_get_number('/Root/Pages/Count')

      # Loop through each page in the PDF file
      (1..page_count).each do |page_number|
        # Open the page
        pdf.open_pdi_page(page_number, '')

        # Get the width and height of the page
        width = pdf.pcos_get_number("/Page#{page_number}/Width")
        height = pdf.pcos_get_number("/Page#{page_number}/Height")

        # Do something with the page here

        # Close the page
        pdf.close_pdi_page

      end

      # Close the PDF document
      pdf.close_pdi_document

    rescue PDFlib::Exception => e
      puts "PDFlib exception occurred in opening the document: #{e.get_errmsg}"
    ensure
      # Clean up
      pdf.delete if pdf
    end

This code creates a new PDFLib object, opens the PDF file using the open_pdi_document method, gets the number of pages in the PDF file using