title: How can I set custom meta tags with the pdflib library?
body: <p>I am using pdflib library to generate pdf in php. I am able to create the pdf with this library but yet not able to generate custom meta tags for pdf.</p>
  
  <p>can any one help me out from this, so that I'm able to generate meta tags for my pdf.</p>
  
  <p>Thanks!</p>