title: How to create Dynamic Download Link in PHP
body: <p>Is there a way we can create a dynamic download link in PHP for a single file for some period of time or the download link expires after that time. After that period the download link changes.</p>
  
  <p>Actually I have a requirement where the download link should be accessible only through a particular email. I can't add that file as an attachment because of its size.</p>
  
  <p>Can any one help me in this.</p>