Bug #62808 [NEW]: Using derived autoloader classes doesn't work

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