title: How to set cookies for 20 min and check if they are expired
body: <p>I was thinking of a system that will allow users to post only 1 article per 20 min. I don't use a member system so I thought I could set a cookie for 20 min. And when user posts something check if cookie is set if yes show message like "Only 1 post per 20 min allowed" if it is not set than put stuff in database.</p>
  
  <p>I'm relatively new to php and don't know how to set cookies, I tried looking at php.net manual on cookies, but it was too confusing for me. So can you please show how to set a secure cookie for 20 min and check if it is or is not set. Maybe you have Better suggestions that will work instead of cookies etc.</p>
  
  <p>Thank You.</p>