title: Subtracting 1 from a value and storing it in another variable
body: <p>I vaguely remember running into this problem before, but I'm wondering if this just doesn't work in PHP:</p>
  
  <pre><code>echo $counter; // outputs 4
  $output = $counter--;
  echo $output; // outputs 4
  </code></pre>
  
  <p>If I do something like:</p>
  
  <pre><code>$output = $counter - 1;
  </code></pre>
  
  <p>I have no problems whatsoever.</p>
  
  <p>Can someone shed some light on this?</p>
  
  <p>Thanks,
  Ryan</p>