Calculating difference between 2 Zend_Date objects <p>I have 2 Zend_Date objects:</p> <pre><code>$d1 = new Zend_Date('2011-11-14 12:20:30'); $d2 = new Zend_Date('2012-11-16 13:40:10'); </code></pre> <p>And I need to calculate difference. My output should be like this:</p> <pre><code>Years: 1, Months: 0, Days: 2, Hours: 1, Minutes: 19, Seconds: 40 </code></pre> <p>I can do it with <code>DateTime</code> class and <code>diff</code> method. But my hoster has PHP version &lt; 5.3. Can you help me how can I do it in Zend? Thanks.</p>