It is possible sum values by keys? how do it (php)
<p>Array for example </p>

<pre><code>$array = array(
  array('first'=&gt;5), array('first'=&gt;4), array('second'=&gt;3)
);
</code></pre>

<p>How sum values by keys for result:</p>

<pre><code>$result = array(
  'first'=&gt;9,
  'second'=&gt;3
);
</code></pre>

<p>Thanks in advance.</p>
