From: maciej dot sz at gmail dot com
Operating system: Linux
PHP version: 5.4.8
Package: Scripting Engine problem
Bug Type: Bug
Bug description:Defining a interface const with value of another constant
triggers fatal error
Description:
------------
When a constant is defined in an interface with a value of another class or
interface constant, a fatal error is triggered:
Fatal error: Cannot inherit previously-inherited or override constant FOO
from interface IMyInterface in Bar.php on line 3
To reproduce this following conditions must be met (took me 2 days to
figure this out):
- the constant value must be defined as another class/interface constant
- classes and interfaces must be autoloaded on demand
- two classes must implement the interface
- one class must inherit the other one
- the super class must be instantiated before the sub class
Seems like this is related to bug #33732 and bug #38286 but is still not
fixed.
Test script:
---------------
File IMyInterface.php:
----------------------
<?php
interface IMyInterface
{
// Use any class or interface constant as value of FOO.
// I'll just use some constant available out of the box, to keep it
simple:
const FOO = FilesystemIterator::CURRENT_AS_PATHNAME;
}
File Foo.php:
----------------------
<?php
class Foo implements IMyInterface {}
File Bar.php:
----------------------
<?php
class Bar extends Foo implements IMyInterface {}
File index.php:
----------------------
<?php
date_default_timezone_set('Europe/Warsaw');
spl_autoload_register(function($cname){
if ( class_exists($cname, false) || interface_exists($cname, false) )
{
return;
}
require_once "{$cname}.php";
});
// Foo is super-class for Bar.
// uncomment below line to trigger the error:
$F = new Foo();
// this should run without errors at any time, but if Foo is instantiated
// prior to this line, then the error is triggered:
$B = new Bar();
Expected result:
----------------
No errors, the code is correct.
Actual result:
--------------
Fatal error: Cannot inherit previously-inherited or override constant FOO
from interface IMyInterface in Bar.php on line 3
--
Edit bug report at https://bugs.php.net/bug.php?id=63359&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=63359&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=63359&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=63359&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=63359&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=63359&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=63359&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=63359&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=63359&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=63359&r=support
Expected behavior: https://bugs.php.net/fix.php?id=63359&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=63359&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=63359&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=63359&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63359&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=63359&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=63359&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=63359&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=63359&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=63359&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=63359&r=mysqlcfg
