Description:
------------
If one tries to extend a class that implements a Interface, php5
produces a error message:
Fatal error: Class 'Bar' not found in foo.php on line xxxxx

I use the CLI Version of php.
PHP 5.1.2 (cli) (built: Nov  2 2006 12:29:42)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies

Reproduce code:
---------------
<?php   
        class Bar extends Foo {
        }
        interface i {
        }
        class Foo implements i {
        }
?>

Expected result:
----------------
started on the commandline with the command:
php5 foo.php it should return simply nothing. But it throws an error.
if you just extend the class after you defined it it does not throw the
error:
<?php   
        interface i {
        }
        class Foo implements i {
        }
        class Bar extends Foo {
        }
?> 
Since this behaviour is not reproducable with a missing Interface, i
think this is a Error on Interfaces.

Actual result:
--------------
The error message 
Fatal error: Class 'Bar' not found in foo.php on line xxxxx

Sorry, just while reading. The error Message is not:
Fatal error: Class 'Bar' not found in foo.php on line xxxxx

but 
Fatal error: Class 'Foo' not found in foo.php on line xxxxx

sorry for that. i hope you can reproduce it.

This is not a bug.
PHP always declares classes those implement interfaces at run-time. So
in your example you cannot declare "Bar" because "Foo" is not declared
yet.
Your report may be categorised as "feature request", but it cannot be
fixed in 5.2.* anyway, because of binary compatibility.