Get elements of associated array based on values
<p>I have this array:</p>

<pre><code>Array ( 'jan' =&gt; 2, 'feb' =&gt; 1, 'mar' =&gt; 2, 'apr' =&gt; 1 )
</code></pre>

<p>..and I want to return:</p>

<pre><code>Array ('jan', 'mar')
</code></pre>

<p>As in, find the 2 elements with the highest count and put them in an array. What is the simplest way to achieve this?</p>
