Bug #68485 [Opn->Nab]: late namespace resolution with cross-namespace inheritance missing
Edit report at https://bugs.php.net/bug.php?id=68485&edit=1
ID: 68485
Updated by: requinix@php.net
Reported by: llmll at gmx dot de
Summary: late namespace resolution with cross-namespace
inheritance missing
-Status: Open
+Status: Not a bug
Type: Bug
Package: Class/Object related
Operating System: any
PHP Version: 5.5.19
Block user comment: N
Private report: N
New Comment:
LSB happens with the static keyword, not class names. Classes always resolve according to the
namespace of the code being executed (or by use statements), not some kind of contextual namespace
dependent on where the code is being executed.
echo static::$Value;
Don't forget that trying to access an undefined static property will fatal.
Previous Comments:
------------------------------------------------------------------------
[2014-11-23 21:50:26] llmll at gmx dot de
Description:
------------
Since PHP 5.3 we have late static binding to get a static variable from the actually instantiated
class type instead of the declared type. This is an important feature, but it does not take into
account a change in namespace. If the inheriting class lives in another namespace the wrong value is
taken.
If inside a namespace a class uses a peer class by its relative name, and later both classes are
derived in another namespace, all accesses go to the original namespace where the class was declared
in the first place.
Neccessary would be a late (runtime) namespace resolution for class names, the same was it works for
static::
Test script:
---------------
<?php
namespace Alpha;
class Base {
public static function Write() {
echo Helper::$Value;
}
}
class Helper {
public static $Value = "ALPHA";
}
namespace Beta;
class Base extends \Alpha\Base {
}
class Helper extends \Alpha\Helper {
public static $Value = 'BETA';
}
\Beta\Base::Write();
?>
Expected result:
----------------
As the exmple calls \Beta\Base::Write() in \Beta namespace one would expect the output to be
"BETA". The original static property is overwritten in Beta-namespace
The calls Helper::$Value should be call-context-sensitive. If called in namespace \Alpha it shoult
print "ALPHA" if called from a \Beta class, "BETA".
Actual result:
--------------
prints "ALPHA"
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=68485&edit=1
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