Edit report at http://bugs.php.net/bug.php?id=52412&edit=1
ID: 52412
Comment by: michael at squiloople dot com
Reported by: madboyka at yahoo dot com
Summary: __autoload fails to throw exception when calling a
static method on the class
Status: Bogus
Type: Bug
Package: Scripting Engine problem
Operating System: *
PHP Version: 5.3.3
Block user comment: N
Private report: N
New Comment:
Here's a request to re-open the bug, for it is indeed a bug: exceptions
can be
thrown and caught if the method called is _not_ static, as documented,
but cannot
be thrown and caught if the method _is_ static (and where the class name
is not a
variable), which is both inconsistent and against the documentation. It
is
_unexpected_ behaviour.
Previous Comments:
------------------------------------------------------------------------
[2011-02-16 15:31:49] madboyka at yahoo dot com
To: der...@php.net
I don't think you've read the documentation on autoloading yourself:
http://www.php.net/manual/en/language.oop5.autoload.php
The first note states that since PHP 5.3, you may throw an exception
from the autoload function (even if the class can be loaded) and catch
that exception without a problem. Examples #3 and #4 in the
documentation entry demonstrate this. This works when the autoload
function gets invoked when instantiating a class, but doesn't when you
make a static call on it. This behavior is not consistent.
Also, take a look at michael@...'s workaround, which unexpectedly works
great. And don't tell me that PHP behaves as "expected".
I understand, that this is not a major bug, we all can live without a
fix, but at least mark it as to be fixed in the far future.
------------------------------------------------------------------------
[2011-02-16 11:24:38] der...@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
FWIW, this is "expected". The __autoload() method is the last line of
defense for PHP to find a class definition. If it can't find it, PHP
bails out with a fatal error. If you throw an exception, you basically
abort this final chance, and thus gives PHP you that fatal "can not find
class" error. However, you can catch the exception in the __autoload()
method,
------------------------------------------------------------------------
[2011-02-16 08:05:14] michael at squiloople dot com
There's a slight hack of a solution tested using PHP 5.3.5 and Windows
Vista:
use a variable as the class name:
function __autoload($class)
{
if (!include $class . '.php')
{
throw new Exception('Cannot autoload ' . $class);
}
}
$class = 'Application';
try
{
$class::start();
}
catch (Exception $e)
{
echo $e->getMessage();
}
// Outputs the exception as expected.
------------------------------------------------------------------------
[2010-09-25 23:39:25] alex dot offshore at gmail dot com
Temporary solution.
Caveats and notices:
- The class actually WILL BE DEFINED ANYWAY;
- 'eval' usage;
- __callStatic used to avoid "method not found" error.
<?php
function __autoload($className)
{
echo "Want to load $className.\n";
// assuming we can not load class
// error handling code
{
eval('class ' . $className . ' { static function __callStatic($n,
$a) { return false; } }');
throw new Exception("Unable to load $className.");
}
}
try
{
//new MissingClass(); // works as expected
MissingClass::someFunction();
}
catch (Exception $e)
{
echo 'CAUGHT: ' . $e->getMessage(), "\n";
}
------------------------------------------------------------------------
[2010-09-03 03:26:56] php dot net at phrozenbyte dot de
Same on Ubuntu 10.04 / Apache 2.2 and CLI mode
Test script:
---------------
<?php
spl_autoload_register(
function($autoload) {
throw new Exception();
}
);
try {
Foo::bar();
} catch(Exception $e) {
echo "Exception caught\n";
}
?>
Expected result:
----------------
Exception caught
Actual result:
--------------
Fatal error: Class 'Foo' not found in /home/daniel/www/other/php-bug.php
on line 0
------------------------------------------------------------------------
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the rest of the comments, please view the bug report online at
http://bugs.php.net/bug.php?id=52412
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