Description:
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Hi,

Since php5.2, all my classes have error due to something that changed in php5.2 : 

Fatal error: Class XtfLexer cannot implement previously implemented interface XtfParserRegistrable 

The reason of that ?

Well take a look at the classes (the code does not interest you as it's not the problem)

interface XtfParserRegistrable {}
interface XtfHeaderHandler extends XtfParserRegistrable {}
class XtfLexer implements XtfHeaderHandler, XtfParserRegistrable {}

Because the interface extends XtfParserRegistrable, the XtfLexer can not implements XtfParserRegistrable itself.

This is STUPID, REALLY STUPID.

What happens if one day I change the interface/classes I implements/extends, and if I still wish to benefit from one interface that is *possibly* implemented by my parents interfaces/classes?

Well : it will fails.

Reproduce code:
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Try this :

interface XtfParserRegistrable {}
interface XtfHeaderHandler extends XtfParserRegistrable {}
class XtfLexer implements XtfHeaderHandler, XtfParserRegistrable {}


Expected result:
----------------
We can implements interface implemented by parent class/interface, and no (fatal) error should be thrown.

Actual result:
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We can't.