title: Confusion with 'use' identifier in PHP closures
body: <p>I'm a little confused with PHP closures. Can someone clear this up for me:</p>
  
  <pre><code>// Sample PHP closure
  my_method(function($apples) use ($oranges) {
      // Do something here
  });
  </code></pre>
  
  <p>What's the difference between <code>$apples</code> and <code>$oranges</code> and when should I be using each?</p>