How to make dynamic substitution of parameters into a document in Google Docs via API?

Question

Google

The manager set the task: there are documents in Google Docs with placeholders like {{username}}, for which you need to make a wrapper in PHP.
The bottom line is this: when you click on a link on the project page, a document in RTF format should be generated and downloaded. Those. a request is made to the Google Docs API, the document is preloaded into memory, the necessary parameters are substituted, then it is issued to the user.
I tried to do it through an intermediate step: i.e. we download the document in html format, substitute the parameters through preg_replace, form a new document and send it for delivery through the PhpWord library. But the problem turned out to be that PhpWord cannot form a new dock normally and gives errors. Therefore, I hope that such operations can be done exclusively by means of the API.
Is it real? Please tell me who knows.

Answer 1

I did it differently. There is a docxtpl library in python. It is very easy to replace values ​​in a dox file (like string formatting). Save new file and then send file to gdrive
php not for files =)

doc = DocxTemplate(path_to_template)
context = {
            'theme': theme,
            'regnumber': regnumber,
            'address': address,
            'date': date_created.strftime("%d.%m.%Y")
        }
doc.render(context)