title: Checking whether current time exceeded a time limit
body: <p>For my PHP project I am verifying user emails by mailing them an activation link. On clicking the link which is send along with the email, there email should be verified. This should happen only if the user opens the link within an already set time in admin panel.</p>
  
  <p>I have a table for settings which have the time limit for email verification as:</p>
  
  <p><strong>id        name         value</strong></p>
  
  <p>1           email         36000</p>
  
  <p>The time limit(36000) is in seconds. The user email will get verified only if he opens the link within 10 hours after registration. How can I achieve this using Unix timestamp.</p>