title: How to find references in workspace (ctrl+shift+g) in Eclipse PHP?
body: <p>I'm using Eclipse PDT, and I have opened my project in PHP, the auto-complete works, the type searching works, but what doesn't work is if I click the name of the function and press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>G</kbd> it doesn't return other references to that function in the workspace.  </p>
  
  <p>I'm familiar with Java + Eclipse, and doing this in Java brings up a search of all calls to that function in the workspace.  I'm brand new to PHP, so is there something wrong? Does PHP not "reference" things like in Java?</p>
  
  <p>(Note: I did set up the <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>G</kbd> key binding to Find references in workspace)</p>