title: ADD 30 day interval inside MySQL query
body: <p>I currently have a working code that adds an order inside an event calendar, but I wan't to add the expiration date that comes with the order (30 days after the order has send). </p>
  
  <pre><code>    //Include db configuration file
      include 'connect.php';
      $currentDate = date("Y-m-d H:i:s");
      //Insert the event data into database
      $insert = $conn-&gt;query("INSERT INTO events (title,date,created,modified,tht) VALUES ('".$title."','".$date."','".$currentDate."','".$currentDate."','".$date." + INTERVAL 30 DAY')");
      if($insert){
          echo 'ok';
      }else{
          echo 'err';
      }
  </code></pre>
  
  <p>Currently this code is working just fine, however shipping date is the same as expiration date, instead of the 30 days later that I want. What am I missing here? </p>