I don’t believe there would be a PHP function (directly) that would allow this. there is a package (I believe it’s called fpdf) that will allow you to “Create” PDF’s on demand. Using that, if you are creating your 200 PDFs, then you could “Limit” the creation of just a single page.
You will however still run into a problem, I believe, as you will need to create an image rather than a pdf. I don’t believe the browser can open multiple PDFs in a single window (First page or not)