How to merge these two arrays?
<p>How to merge these two arrays...</p>

<pre><code>$arr1 = array(
    [0] =&gt; 'boofoo',
    [1] =&gt; '2'
);

$arr2 = array(
    [0] =&gt; 'fbfb',
    [1] =&gt; '6'
);
</code></pre>

<p>to get a third array as follows?:</p>

<pre><code>$arr3 = array(
    [0] =&gt; 'boofoo',
    [1] =&gt; '6'
);
</code></pre>

<p>That is, preserve strings that are longer and numeric values that are higher.</p>
