Bug #65006 [Com]: spl_autoload_register fails with multiple callables using self, same method
| From: | danielklein at airpost dot net | Date: | Sat, 15 Jul 2017 06:45:21 +0000 |
| Subject: | Bug #65006 [Com]: spl_autoload_register fails with multiple callables using self, same method | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-210065@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=65006&edit=1
ID: 65006
Comment by: danielklein at airpost dot net
Reported by: byoung2 at gmail dot com
Summary: spl_autoload_register fails with multiple callables
using self, same method
Status: Verified
Type: Bug
Package: SPL related
Operating System: Windows or Linux
PHP Version: 5.4.16
Block user comment: N
Private report: N
New Comment:
Try the following code with SHOW_BUG = true, then rerun it with SHOW_BUG = false. I've
reproduced this bug in PHP 5.4, 5.5, 5.6 and 7.0.
I think the bug is because PHP is storing the key 'self' or 'static' against the
function, instead of resolving it to the class name at the time the function is registered. This
implies that it is resolved every time the function is called, instead of only once, when the
function is registered.
<?php
const SHOW_BUG = true;
class Autoloader {
const AUTOLOAD_METHOD = 'autoload';
public static function register() {
if (SHOW_BUG) {
spl_autoload_register(['static', static::AUTOLOAD_METHOD]);
}
else {
spl_autoload_register([get_called_class(), static::AUTOLOAD_METHOD]);
}
}
protected static function autoload($class_name) {
$words = self::split_class_name_into_words($class_name);
}
}
class Autoloader2 extends Autoloader {
}
class Autoloader3 extends Autoloader {
}
Autoloader2::register();
Autoloader::register();
Autoloader3::register();
var_dump(spl_autoload_functions());
Previous Comments:
------------------------------------------------------------------------
[2016-06-20 14:32:49] cmb@php.net
Confirmed: <https://3v4l.org/aMkoi>. Obviously, hhvm gets
that
right.
------------------------------------------------------------------------
[2013-06-10 15:05:14] byoung2 at gmail dot com
Description:
------------
spl_autoload_register should properly resolve 'self' to the current execution scope, which
it does for the 'first' class, but it does not for the 'second' class. Only the
first autoload is registered. If I change the method name in the 'second' class to
'load2' for example, and register array('self','load2') using
spl_autoload_register, it works. It also works if I replace 'self' with __CLASS__, which I
have done as a workaround. Using 'static' instead of 'self' has the same bug,
but __CLASS__ won't work in this case if you want late static binding.
Test script:
---------------
<?php
first::init();
second::init();
print_r(spl_autoload_functions());
class first
{
public static function init() {
spl_autoload_register(array('self','load'));
}
public static function load($class) {}
}
class second
{
public static function init() {
spl_autoload_register(array('self','load'));
}
public static function load($class){}
}
Expected result:
----------------
Array
(
[0] => Array
(
[0] => first
[1] => load
)
[1] => Array
(
[0] => second
[1] => load
)
)
Actual result:
--------------
Array
(
[0] => Array
(
[0] => first
[1] => load
)
)
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=65006&edit=1