title: How can I change a PDF's meta title that appears in the browser tab in PHP?
body: <p>I have a PDF that has been generated with wkhtmltopdf, but it does not have a title. Therefore, browsers use the last part of the URL for the tab's title and the PDF preview title. I would like to change the title that appears in those places.</p>
  
  <p>I understand that this is defined by the meta title of the PDF document, but how can I go about changing it in PHP?</p>
  
  <p><a href="https://i.stack.imgur.com/gpjy5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gpjy5.png" alt="Example of a PDF with no meta title"></a></p>