Edit report at https://bugs.php.net/bug.php?id=61442&edit=1
ID: 61442
Updated by: larue...@php.net
Reported by: yks-uno at yandex dot ru
Summary: SPL autoload issues Fatal Error if a handler throws
exception
Status: Not a bug
Type: Bug
Package: SPL related
Operating System: Linux, FreeBSD
PHP Version: 5.3.10
Block user comment: N
Private report: N
New Comment:
http://us.php.net/autoload
"Note:
Prior to 5.3.0, exceptions thrown in the __autoload function could not be
caught
in the catch block and would result in a fatal error. From 5.3.0+ exceptions
thrown in the __autoload function can be caught in the catch block, with 1
provision. If throwing a custom exception, then the custom exception class must
be available. The __autoload function may be used recursively to autoload the
custom exception class."
Previous Comments:
------------------------------------------------------------------------
[2012-09-19 08:54:26] yks-uno at yandex dot ru
And please would you mind to show the exact place in the PHP documentation
where it is stated that an autoload handler ALWAYS DIES regardless of
exceptions or substituting another class if it does not find the class it is
trying to load?
Or there is "no information available, might only be in SVN" ???
------------------------------------------------------------------------
[2012-09-19 08:43:30] yks-uno at yandex dot ru
Sorry but you're wrong. Do you understand what the function
spl_autoload_register() does? And what the function x() does? The function x()
is a handler for loading classes - That is what autoload handler SHOULD DO, it
should LOAD classes which are NOT LOADED yet. And at the moment of loading,
you can not tell whether a class EXISTS or not. The test script is calling a
method of a class which is NOT LOADED yet.
It SHOULD report an error if the class being loaded is not found. But it
SHOULD NOT DIE on throwing an exception!!! This IS A BUG because an exception
is not thrown where it is explicitly written.
You cleverly advise me to use class_exists on a NOT LOADED class, so it just
AGAIN forwards an autoload call to the handler (function "x") which eventually
DIES.
If you are so clever then just remove the autoload handler from PHP and force
use require_once.
Sorry for my being angry, but, damn, it was a HALF-YEAR since bug submitted to
invent such a stupid reason that it is not a bug!!!
------------------------------------------------------------------------
[2012-09-19 07:44:46] larue...@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
if you just want to check whether a class exists, use class_exists.
you test script is trying to call a method of a non-exists class, fatal error
is
reasonable .
------------------------------------------------------------------------
[2012-09-19 07:15:33] yoorick at samovarchik dot info
If you try to use a class constant (e.g. Foo::BAR) of an unexisting class,
autoloader will also fail to throw an exception and the script will die with
the "class not found" fatal error.
(PHP 5.3.16)
------------------------------------------------------------------------
[2012-03-19 19:18:01] yks-uno at yandex dot ru
Description:
------------
If a handler is registered for autoloading (whether via spl_autoload_register()
or __autoload()) and it throws an exception when a class is not found, the
exception can not be caught as usual if a method of the target class is
statically called. Instead, a Fatal Error: Class not found is issued (which is
quite what the autoloader is meant to avoid!)
Yet, when, e.g. trying to access a static field of that class, the exceptions
get caught correctly.
Tested on several PHP versions (5.3.3 - 5.3.10) on Linux and FreeBSD.
Test script:
---------------
<?
function x($class)
{
print "xxx\n"; // gets printed
throw new Exception("Class '{$class}' not found");
}
spl_autoload_register('x');
try {
$a = A::z(); // FATAL ERROR: class 'A' not found
// NOTE:
// $a = A::$z; - will be correctly caught
} catch (Exception $ex) {
print "{$ex}\n"; // never gets executed
}
Expected result:
----------------
xxx
exception 'Exception' with message 'Class 'A' not found' in <FILE>:5
---
this is what gets output in case the exception is caught
Actual result:
--------------
xxx
Fatal error: Class 'A' not found in <FILE> on line 10
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=61442&edit=1
