title: How to parse datetime for use in highchart graph?
body: <p>Here  i got timestamp value </p>
  
  <pre><code>$user_array1[] = $val['timestamp'];
  $graph_data1 ='';  
  if(is_array($user_array1))
  {
     $graph_data1 = implode(',',$user_array1);
  } 
  </code></pre>
  
  <p>Output when i <code>print_r($graph_data1);</code></p>
  
  <p>I got </p>
  
  <blockquote>
    <p>,2014-05-26 00:43:45,2014-05-26 00:43:52,2014-05-26 00:43:592014-05-26
    00:43:19,2014-05-26 00:43:24,2014-05-26 00:43:27,2014-05-26
    00:43:30,2014-05-26 00:43:34,2014-05-26 00:43:37,2014-05-26
    00:43:41,2014-05-26 00:43:45,2014-05-26 00:43:52,2014-05-26
    00:43:59,2014-05-26 00:44:11</p>
  </blockquote>
  
  <p>Highchart side : </p>
  
  <pre><code>categories: [&lt;?php echo $graph_data1 ?&gt; ]
  </code></pre>
  
  <p>it does not show any things.</p>