title: Php add 24 htrs to current unix time
body: <p>Am saving date and time in php and having a condition that checks if the time minus 24 hours is less than zero</p>
  
  <p>This is how i have tried</p>
  
  <pre><code>$time_registed=1500373706;
  $timeafter24hrs = $time_registed + //am stuck here 
  
  if($timeafter24hrs - time() &lt; 0){
  
      //do stuff since its after 24 hrs
   }
  </code></pre>
  
  <p>How do i add 24 hrs to the unix time?</p>