[PHP] Bug with passing objects by reference and assigning a defeault null?

[Shu Chow]

Has anyone tried to assign a default value of null for an object passed 
by reference in PHP4?

Let's say I had this code:
  $mObj = new testModel();
  $mObj->msg = "Bubba";

  testFunc();

  class testModel {
    var $msg;
  }

  function testFunc(&$msg=null) {
    echo $msg->msg;
  }

Under PHP5, this works fine.

Under PHP4, the "=" will cause an error:  Parse error: syntax error, 
unexpected '=', expecting ')'.  Removing the "&" in the parameter 
definition makes it work.  I'm using 4.4.2 right now, but don't see 
anything in the later change logs that say this was fixed.  I also don't 
find any mention of it in the bugs list.  Is this a legit bug or am I 
committing a big no-no?

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