title: Remove NULL, FALSE, and '' - but not 0 - from a PHP array
body: <p>I want to remove <code>NULL</code>, <code>FALSE</code> and <code>''</code> values .</p>
  
  <p>I used <code>array_filter</code> but it removes the <code>0</code>' s also.</p>
  
  <p>Is there any function to do what I want?</p>
  
  <pre><code>array(NULL,FALSE,'',0,1) -&gt; array(0,1)
  </code></pre>