title: Sorting an array with DateTime strings?
body: <p>How can i sort efficiently this array (recent items first) on <code>end_time</code> value in PHP?</p>
  
  <pre><code>array
    0 =&gt; 
      array
        'value' =&gt; int 4
        'end_time' =&gt; string '2012-01-20T08:00:00+0000' (length=24)
    1 =&gt; 
      array
        'value' =&gt; int 0
        'end_time' =&gt; string '2012-01-21T08:00:00+0000' (length=24)
    2 =&gt; 
      array
        'value' =&gt; int 5
        'end_time' =&gt; string '2012-01-22T08:00:00+0000' (length=24)
    3 =&gt; 
      array
        'value' =&gt; int 4
        'end_time' =&gt; string '2012-01-23T08:00:00+0000' (length=24)
    4 =&gt; 
      array
        'value' =&gt; int 7
        'end_time' =&gt; string '2012-01-24T08:00:00+0000' (length=24)
  </code></pre>