title: Watermarking on PDF files using PHP
body: <p>I am developing a website which needs to create PDF files dynamically. All those things completed and I am using PHP. Now there is one more facility needed that after the creation of PDF file, watermark should be added to every page ( on center position ) . Watermark image will be uploaded by the user. Please help me with sample codes.</p>
  
  <p>Thank You,<br>
  Syam</p>