Bug #68138 [Com]: spl_autoload_register fails to load object from session after session_start()

Edit report at https://bugs.php.net/bug.php?id=68138&edit=1 ID: 68138 Comment by: michal dot rudnicki at epsi dot pl Reported by: michal dot rudnicki at epsi dot pl Summary: spl_autoload_register fails to load object from session after session_start() Status: Not a bug Type: Bug Package: Session related Operating System: Windows/Linux PHP Version: 5.5.17 Block user comment: N Private report: N New Comment: Thank you. This clarifies. I didn't realize it had something to do with symbols creation at parse time vs registration at run time. Previous Comments: ------------------------------------------------------------------------ [2014-10-02 20:59:35] requinix@php.net Regular functions are identified, so to speak, when the containing file is first loaded and parsed*. PHP knows about __autoload immediately so when the session begins, even though execution hasn't actually reached the "function __autoload($className) {" line yet, PHP can run the autoloader. Not the case with spl_autoload_register() because it's an actual statement that has to be executed to set up the autoloader. *Do not do this* but if you kept __autoload as a function and did spl_autoload_register("__autoload"); then everything would work - but it would do so through the older __autoload convention and not through the newer SPL method. You must do session_start() after installing the autoloader. * if at the top-most scope in the file, ie. not within conditionals or loops or other structures. ------------------------------------------------------------------------ [2014-10-02 20:42:33] michal dot rudnicki at epsi dot pl Description: ------------ Hi All, Problem: When loading classes with __autoload, restoring objects from session works regardless whether session_start() was called before or after __autoload was declared. When loading classes with spl_autoload_register, restoring objects from session only works when session_start() called after registering loader, and returns __PHP_Incomplete_Class object when called before registering loader. PHP and OS versions: - 5.5.1 on Windows 2008 Server 64 bit - 5.5.9 on Ubuntu Linux 14.04 64 bit Preparation: Create file Foo.php with empty declaration of class Foo. Test script: --------------- <?php session_start(); spl_autoload_register(function ($className) { include "{$className}.php"; }); isset($_SESSION["foo"]) or $_SESSION["foo"] = new Foo(); var_dump($_SESSION); Expected result: ---------------- array(1) { ["foo"]=> object(Foo)#2 (0) { } } Actual result: -------------- array(1) { ["foo"]=> object(__PHP_Incomplete_Class)#1 (1) { ["__PHP_Incomplete_Class_Name"]=> string(3) "Foo" } } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=68138&edit=1