You are right, we will fix it in our compiler. Thanks.

This one is bogus - constructors can be inherited by subclasses and 
there is a perfectly valid parent class constructor.

The rest have been fixed.

Well, warnings give an information that you may forget about something 
but they don't mean the code cannot work well. In these particular 
cases, the new operator takes some parameters and hence one would 
expect there will be a constructor consuming these parameters. For 
example, there is no ctor defined on Horde_Cache but there is the 
following code around line 121 in Cache.php:

         if (empty($driver) || $driver == 'none') {
             return $cache = &new Horde_Cache($params);
         }

I'm not familiar with your code in details so I don't know the intents 
behind. I can only suggest to add ctors at least to make clear to 
developers extending the class that there can be a parameter used when 
instantiating it.

Are the missing ctor warnings really a problem?  I'm working on the 
other warnings.

During testing of the latest release of our PHP compiler (Phalanger, 
php-compiler.net) we have found following bugs in your code. We 
strongly believe these are bugs in the code and not in the compiler. 
However, if that wasn't the case, please report me back. Thanks.

C:\Web\Horde\lib\Horde\Auth.php(275,45): warning: Library function 
'implode' called with wrong number of parameters
C:\Web\Horde\lib\Horde\Cache.php(121,30): warning: Class 'Horde_Cache' 
has no constructor defined
C:\Web\Horde\lib\Horde\Editor.php(43,31): warning: Class 
'Horde_Editor' has no constructor defined
C:\Web\Horde\lib\Horde\History.php(100,25): warning: Class 
'DataTreeObject_History' has no constructor defined
C:\Web\Horde\lib\Horde\History.php(323,21): warning: Class 
'DataTreeObject_History' has no constructor defined
C:\Web\Horde\lib\Horde\Token.php(138,30): warning: Class 'Horde_Token' 
has no constructor defined
C:\Web\Horde\lib\Horde\Browser\imode.php(292,9): error: Cannot 
redeclare field Browser_imode::$_extra previously declared on (281,9)
C:\Web\Horde\lib\Horde\MIME\Viewer\richtext.php(76,21): warning: 
Library function 'str_ireplace' called with wrong number of parameters
C:\Web\Horde\lib\Horde\MIME\Viewer\richtext.php(87,21): warning: 
Library function 'str_ireplace' called with wrong number of parameters
C:\Web\Horde\lib\Text\Diff\Renderer\inline.php(123,22): warning: Class 
'Text_Diff_Renderer_inline' has no constructor defined
C:\Web\Horde\lib\Text\reST\Formatter\html.php(92,9): warning: The 
'case' label with value Paragraph has already been declared
C:\Web\Horde\po\translation.php(715,21): error: Cannot break/continue 
3 level(s)