From: nicolas dot grekas+php at gmail dot com
Operating system: Linux & Windows
PHP version: 5.2.5
PHP Bug Type: Scripting Engine problem
Bug description: autoload fails with complex loading scheme
Description:
------------
Hard to explain, see code... I think that PHP should be able to handle
this kind of loading scheme.
Here is what I thought this code would do :
1. __autoload('A') is called
2. inside this call for A:
2.1 class B is defined, which extends C
2.2 as C is not defined, __autoload('C') is called
2.3 inside this call for C:
2.3.1 class C is defined
2.3.2 (now we have everything needed for class B, haven't we ?)
2.3.3 class A extends B
2.4 we leave the __autoload('C') context
3. we leave the __autoload('A') context
The bug is at step 2.3.3 : "class A extends B" triggers an autoload('B'),
which should not occurs, as B should be already defined, thanks to 2.3.2...
Reproduce code:
---------------
<?php
function __autoload($class)
{
switch ($class)
{
case 'A':
case 'B':
class B extends C {};
break;
case 'C':
class C {};
class A extends B {};
break;
}
}
echo (int) class_exists('A');
Expected result:
----------------
1
Actual result:
--------------
Fatal error: Cannot redeclare class B in [...] on line 9
--
Edit bug report at http://bugs.php.net/?id=44848&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=44848&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=44848&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=44848&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=44848&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=44848&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=44848&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=44848&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=44848&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=44848&r=support
Expected behavior: http://bugs.php.net/fix.php?id=44848&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=44848&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=44848&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=44848&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44848&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=44848&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=44848&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=44848&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=44848&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=44848&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=44848&r=mysqlcfg
