#48622 [Opn]: Invalid error reporting with __toString() method

From: Date: Mon, 22 Jun 2009 19:18:26 +0000
Subject: #48622 [Opn]: Invalid error reporting with __toString() method
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-138662@lists.php.net to get a copy of this message
 ID:               48622
 User updated by:  woody dot gilk at kohanaphp dot com
-Reported By:      woody dot gilk at gmail dot com
+Reported By:      woody dot gilk at kohanaphp dot com
 Status:           Open
 Bug Type:         Scripting Engine problem
 Operating System: Mac OSX 10.5
 PHP Version:      5.2.10
 New Comment:

To add a little more information here, I should be able to do this:

try
{
    echo $object.$foo;
}
catch (ErrorException $e)
{
    // Trap the E_NOTICE from $foo being undefined
    echo 'error occurred';
}

However, because an E_FATAL is incorrectly triggered, it is impossible

to do so.


Previous Comments:
------------------------------------------------------------------------

[2009-06-20 22:05:18] woody dot gilk at gmail dot com

Here is a copy of the test script: http://gist.github.com/133305

------------------------------------------------------------------------

[2009-06-20 22:03:30] woody dot gilk at kohanaphp dot com

Description:
------------
When using a custom error handler, it is possible to make PHP trigger
an 
E_FATAL by concatenating an object with a __toString() method together

with a variable that is not set.

Tested in 5.2.9 and 5.2.10.

Reproduce code:
---------------
<?php

class test {

	public static function error_handler($code, $error, $file = NULL,
$line = NULL)
	{
		// This error is not suppressed by current error reporting settings
		throw new ErrorException($error, $code, 0, $file, $line);
	}

	public static function run()
	{
		$object = new self;

		echo $object.$foo;
	}

	public function __toString()
	{
		return __CLASS__;
	}

}

error_reporting(E_ALL);

set_error_handler(array('test', 'error_handler'));

test::run();

Expected result:
----------------
PHP Fatal error:  Uncaught exception 'ErrorException' with message 
'Undefined variable: foo' in php_bug.php:15
Stack trace:
#0 php_bug.php(15): test::error_handler()
#1 php_bug.php(29): test::run()
#2 {main}
  thrown in php_bug.php on line 15

Actual result:
--------------
PHP Fatal error:  Method test::__toString() must not throw an exception

in


------------------------------------------------------------------------


-- 
Edit this bug report at http://bugs.php.net/?id=48622&edit=1



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