title: In symfony, how to define a default value as empty array in yaml file?
body: <p>In symfony1, in yaml file how can i set an empty array?</p>
  
  <pre><code># app.yml
  all:
      test:
          example: // empty array here
  </code></pre>
  
  <p>so when i</p>
  
  <pre><code>&lt;?php echo sfConfig::get('app_test_example');?&gt; 
  </code></pre>
  
  <p>it returns <code>array();</code></p>