How to generate the TOC when transforming a DOCX file to PDF

1. It is necessary to use the LibreOffice plugin to make the conversion.

2. Open with a text editor the macros file.

This file is located in the home directory of the user that is going to make the conversion.
For example with the default configuration for the apache web server, it is located in the path /var/www/.config/libreoffice/4/user/basic/Standard/Module1.xba.
Or using FastCGI as PHP handler, this file is located at .config/libreoffice/4/user/basic/Standard/Module1.xba of ther user's folder.
If the directory .config/libreoffice, doesn’t exists, make a first conversion so LibreOffice generates this path structure.

3. In the opened file, add the following lines:

Sub SaveToPDF(cFile)

  Dim oPropertyValue As new com.sun.star.beans.PropertyValue

  cURL = convertToURL(cFile)

  oPropertyValue.Name = "Hidden"
  oPropertyValue.Value =  True
  oDoc = StarDesktop.loadComponentFromURL(cURL, "_blank", 0, Array(oPropertyValue))

  dispatcher = createUnoService("com.sun.star.frame.DispatchHelper")
  dispatcher.executeDispatch(oDoc.CurrentController.Frame, ".uno:UpdateAllIndexes", "", 0, Array())

  GlobalScope.BasicLibraries.LoadLibrary("Tools")
  cFileNew = Tools.Strings.GetFileNameWithoutExtension(cFile) + ".pdf"
  cURL = ConvertToURL(cFileNew)

  oPropertyValue.Name = "FilterName"
  oPropertyValue.Value =  "writer_pdf_Export"
  oDoc.storeToURL(cURL, Array(oPropertyValue))

  oDoc.close(True)

End Sub

Just after Sub Main End Sub.

4. You can now do the conversion setting the toc parameter as true:

$docx->transformDocument('example_text.docx', 'example_text.pdf', null, array('toc' => true));