From: michaelduff2 at yahoo dot com
Operating system: RedHat
PHP version: 5.4.5
Package: SPL related
Bug Type: Bug
Bug description:Using derived autoloader classes doesn't work
Description:
------------
This case breaks autoloading, because of an apparent assumption in the way
spl_autoload processes its registered functions:
namespace BaseLibrary
{
class Loader
{
protected static $ns=__NAMESPACE__;
protected static $dir=__DIR__;
function Load($class_name)
{
// ...fully tested code for autoloading classes
// using static::$ns and static:$dir...
}
}
class SomeClass
{
}
}
namespace DerivedLibrary
{
class Loader extends \BaseLibrary\Loader
{
protected static $ns=__NAMESPACE__;
protected static $dir=__DIR__;
}
class SomeClass extends \BaseLibrary\SomeClass
{
}
}
When an attempt is made to load \DerivedLibrary\SomeClass, spl_autoload
finds it correctly, include()s the file, but then never calls
\BaseLibrary\Loader::Load('\BaseLibrary\SomeClass') -- which is necessary
because \DerivedLibrary\SomeClass extends \BaseLibrary\SomeClass and
\DerivedLibrary\Loader extends \BaseLibrary\Loader.
It simply throws "Class does not exist."
My guess is that the spl_autoload queue uses globally scoped data rather
than function-scoped (stack) data to manage its traversal of the autoload
functions, OR because spl_autoload peeks at the function call stack to
ascertain which autoloaders it has already called (probably to avoid
loops).
If \DerivedLibrary\Loader is made into a verbatim copy of
\BaseLibrary\Loader (i.e., copying the file and changing only the namespace
declaration -- thereby implicitly removing the 'extends
\BaseLibrary\Loader') ... then immediately everything works!
--
Edit bug report at https://bugs.php.net/bug.php?id=62808&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=62808&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=62808&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=62808&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=62808&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=62808&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=62808&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=62808&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=62808&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=62808&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=62808&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=62808&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=62808&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=62808&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=62808&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=62808&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=62808&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=62808&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=62808&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=62808&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=62808&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=62808&r=mysqlcfg
