title: How to increment date with 1 (day/year) in PHP?
body: <p>I have a date stored in an array:</p>
  
  <pre><code>$this-&gt;lines['uDate']
  </code></pre>
  
  <p>The format of the date is not fixed. I can be changed with this:</p>
  
  <pre><code>  define('DATETIME_FORMAT', 'y-m-d H:i');
  </code></pre>
  
  <p>How can I increment my uDate with a certain number of days or years?</p>
  
  <hr>
  
  <p>My question is related to this one:<br>
  <a href="https://stackoverflow.com/questions/2870295/increment-date-by-one-month">increment date by one month</a><br>
  However, in my case the date format in dynamic.<br>
  So, can I do this?</p>
  
  <pre><code>$time= $this-&gt;lines['uDate'];
  $time = date(DATETIME_FORMAT, strtotime("+1 day", $time));
  $this-&gt;lines['uDate']= $time;
  </code></pre>