ID: 49618
Updated by: [email protected]
Reported By: jost dot boekemeier at googlemail dot com
Status: Open
Bug Type: Feature/Change Request
Operating System: *
PHP Version: 5.2.11
New Comment:
There is no way to "fix" this in PHP.
__autoload in itself is not deprecated, but it is not a good idea to
use it as part of a library, for obvious reasons. However, if you know
your code will only have one autoload function, using __autoload will be
just fine.
To me it seems that the library writers that still use __autoload are
at fault here.
Previous Comments:
------------------------------------------------------------------------
[2009-11-19 08:16:22] pn at kreativwert dot de
I second jost here, please try to fix this in PHP. thx.
------------------------------------------------------------------------
[2009-09-23 08:53:11] jost dot boekemeier at googlemail dot com
Right. In particular:
<?php // pjb library
function autoload_pjb($x) {echo "pjb "; return false;}
spl_autoload_register("autoload_pjb");
if(function_exists("__autoload")) spl_autoload_register("__autoload");
?>
<?php // joomla library
function __autoload($x) {echo "joomla "; return false;}
?>
<?php // application
require("pjb.php");
require("joomla.php");
@new Foo();
?>
Please see the link posted with the bug report for all the details.
However, I think neither the user nor joomla nor I have to invent
strange
workarounds for bugs in the php implementation. Any new introduced PHP
feature
must be compatible with earlier PHP features, unless the earlier
features have been
deprecated and a clear migration path exists.
The old __autoload is neither deprecated nor is spl_autoload_register
compatible with
it. Whoever wrote it and the comment "....This is because
spl_autoload_register() will
effectively replace the engine cache fo the __autoload function by
either
spl_autoload() or spl_autoload_call(). " wrote a bug.
> Thus, calling spl_autoload_register() replaces __autoload()
If spl_autoload_register is intended to replace the old __autoload
machinery, the old
__autoload should have been deprecated and a clear migration path
should have
been given to those using it.
------------------------------------------------------------------------
[2009-09-23 07:23:07] [email protected]
So the problem occurs with:
include('spl_autoload_register.php'); // uses spl_autoload_register
include('autoload.php'); // defines __autoload
------------------------------------------------------------------------
[2009-09-22 17:39:32] jost dot boekemeier at googlemail dot com
> if (function_exists("__autoload")) spl_autoload_register("__
autoload")
Doesn't work. In line 7 __autoload is not yet defined.
Note that every line in the given example comes from a separate
include()d php
library.
This is a link-time problem which only php can resolve: it must save a
legacy
__autoload handler before creating the spl_autoload stack and call the
legacy
autoload after all other registered spl_autoload hooks.
------------------------------------------------------------------------
[2009-09-22 17:26:38] [email protected]
If two or more of the libraries use __autoload, it won't work, and
there is nothing anybody can do about it.
If all of the libraries use spl_autoload_register, it works as it
should.
If one of the libraries uses __autoload and others use
spl_autoload_register, it is the task of the library that uses
spl_autoload_register to register __autoload as well, like this:
if (function_exists("__autoload")) spl_autoload_register("__autoload");
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/49618
--
Edit this bug report at http://bugs.php.net/?id=49618&edit=1
