title: How to merge these two arrays?
body: <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>