RegEx - Exclude Commented PHP Code Block

I am using a file search utility (FileSeek) with regex content search. The contents I am searching for is basically any un-commented lines that have while...each in them. I have successfully managed to exclude inline commented lines such as // while (list($key, $value) = each($_GET)) with this regex: ^(?:(?!\/\/).)*while.+[\s=(]each[\s(]

Demo

How can I improve the regex search (make it even more restrictive) to exclude search results from commented lines and commented code blocks \* *\ such as:

/*
  while (list($key, $value) = each($_GET))
*/

Or

/* some code
  while (list($key, $value) = each($_GET))
  some code
*/

In other words, how can I modify my regex to also completely skip/ignore everything inside a commented php block: \* *\ instead of picking up results that are also inside it?

EDIT: Just for reference, here is an example that does the opposite, ie. matches only commented code.