Checking if 2 arrays have atleast 1 equal value
<p>Currently I have 2 array:</p>

<pre><code>array(1, 2, 3, 4);
array(4, 5, 6, 7);
</code></pre>

<p>How can I check if there is atleast one equal value in both of them? (The example above has 1 equal value => 4, so the function should return true).</p>
