Return Values Copied? Copied if By Reference?

[Michael B Allen <mba2000@xxxxxxxxxx>]

Is a function return value copied? If the value is an integer I suppose
it is but what about a string or an array? If you pass by reference is
the return value still copied?

For example, is this:

  function foo(&$arr) {
      $arr[] = "bar";
  }

faster than this?

  function foo(&$arr) {
      $arr[] = "bar";
      return $arr; // is this copied?
  }

I'm working on some code that would be called to generate a cell in a
possibly large table and therefore a small difference in performance
may have a significant impact.

Thanks,
Mike

-- 
Michael B Allen
PHP Extension for SSO w/ Windows Group Authorization
http://www.ioplex.com/

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