Description:
------------
The regular expression in the example on the HTTP authentication page (http://php.net/manual/en/features.http-auth.php) is incorrect.

It seems from the comments on the page, a lot of developers are running into problems trying to use the example.

Expected result:
----------------
The expression is correct. The subpattern for matching quoted values needs to be non-greedy so it doesn't capture the whole auth string.

Here's a cleaned up and commented version of the expression that works:

preg_match_all(
    '@
    (\w+)                 # name
    =
    (?:
      ([\'"])([^\2]+?)\2  # quoted value
      |
      ([^\s,]+)           # unquoted value
    )@x',
    $txt, $matches, PREG_SET_ORDER);