title: How do you find the php file a function is defined in in wordpress?
body: <p>I'm a newbie at WordPress PHP. </p>
  
  <p>I'm looking in the header.php file and it's calling:</p>
  
  <pre><code>&lt;?php suffusion_before_page(); ?&gt;
  </code></pre>
  
  <p>For this function and any other function <em>in WordPress</em>/PHP how do I find which file that function is being defined?</p>