title: Converting string of datetime to array with preg_match
body: <p>I have this date and time string</p>
  
  <blockquote>
    <p>2013-10-21 09:49:51 2013-10-22 10:23:06 2013-10-22 10:23:20 2013-10-22 10:33:34 2013-10-22 10:33:40 2013-10-23 15:14:04 2013-10-23 15:14:09 2013-10-23 15:15:04 2013-10-23 15:26:18 2013-10-23 15:27:26 2013-10-23 15:27:29 2013-10-23 15:37:16 2013-10-23 15:45:08 2013-10-23 15:47:19 2013-10-23 16:05:37 2013-10-23 16:23:28 2013-10-23 16:31:09 2013-10-23 16:32:08 2013-10-23 16:32:54 2013-10-23 17:11:28 2013-10-23 17:12:24 2013-10-23 17:12:33 2013-10-23 </p>
  </blockquote>
  
  <p>I need some to help to process string into array using <code>preg_match</code>.</p>
  
  <p>Example of the expected output array:</p>
  
  <pre><code>datetimeArr=array(0=&gt;'2013-10-21 09:49:51',1=&gt;'2013-10-22 10:23:06',2=&gt;'2013-10-23 15:45:08')
  </code></pre>