title: Converting 2015-12-04 17:02:10 +00:00 time to microseconds
body: <p>I have a time string in <code>2015-12-04 17:02:10 +00:00</code> format.</p>
  
  <p>I want to convert this string in <code>mircoseconds decimal(16,4)</code> like <code>1449825379.3464</code></p>
  
  <p>How can I convert this in PHP? I tried it by using:</p>
  
  <pre><code>echo strtotime("2015-12-04 17:02:10 +00:00");
  </code></pre>
  
  <p>But it just returns <code>1449248530</code> without the microseconds.</p>