title: Shorthand isset(), if not, return default value
body: <p>I'm looking for a shorthand version of this code in PHP:</p>
  
  <pre><code>$address = isset($node-&gt;field_naam_adres['und'][0]['value']) ? $node-&gt;field_naam_adres['und'][0]['value'] : '';
  </code></pre>
  
  <p>Basically, I want to check if the variable is set, and if not, then return a default value.</p>