title: Remove every second element from an array and rearange keys?
body: <p>How should I remove every second element from an array like this (using nothing but the built in Array functions in PHP):</p>
  
  <pre><code>$array = array('first', 'second', 'third', 'fourth', 'fifth', 'sixth', 'seventh');
  </code></pre>
  
  <p>And when I remove every second element, I should get:</p>
  
  <pre><code>$array = array('first', 'third', 'fifth', 'seventh');
  </code></pre>
  
  <p>Possible?</p>