#50688 [NEW]: Warning When Handling Exception in a usort Callback Function

From:	jcampbell at remindermedia dot com	Date:	Thu, 07 Jan 2010 19:42:31 +0000
Subject:	#50688 [NEW]: Warning When Handling Exception in a usort Callback Function
Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-146419@lists.php.net to get a copy of this message

From:             jcampbell at remindermedia dot com
Operating system: Fedora Core 12
PHP version:      5.3.1
PHP Bug Type:     Arrays related
Bug description:  Warning When Handling Exception in a usort Callback Function

Description:
------------
If the callback function used by usort handles an exception using a
try/catch block, a warning is generated. The correct sorting is still done.
This happens even when the exception & handling doesn't involve the
variables.

The example below is the usort example from the manual with only the
try/catch block added. Reproducible in PHP 5.2.11 but not 5.2.9

Reproduce code:
---------------
<?php
function cmp($a, $b)
{
    if ($a == $b) {
        return 0;
    }

    try {
        throw new Exception();
    } catch (Exception $E) {

    }

    return ($a < $b) ? -1 : 1;
}

$a = array(3, 2, 5, 6, 1);

usort($a, "cmp");


Expected result:
----------------
No warning message.

Actual result:
--------------
PHP Warning:  usort(): Array was modified by the user comparison function
in /home/jcampbell/usortExceptionWarning.php on line 19

-- 
Edit bug report at http://bugs.php.net/?id=50688&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=50688&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=50688&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=50688&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=50688&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=50688&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=50688&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=50688&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=50688&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=50688&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=50688&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=50688&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=50688&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=50688&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=50688&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=50688&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=50688&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=50688&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=50688&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=50688&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=50688&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=50688&r=mysqlcfg



   

Thread (20 messages)

• jcampbell at remindermedia dot comThu, 07 Jan 2010 19:42:31 +0000
  • jani@php.netThu, 07 Jan 2010 20:26:43 +0000#50688 [Opn->Ver]: Warning When Handling Exception in a usort Callback Function
  • federico dot lebron at gmail dot comFri, 08 Jan 2010 01:51:56 +0000#50688 [Com]: Warning When Handling Exception in a usort Callback Function
  • jani@php.netWed, 20 Jan 2010 10:22:02 +0000#50688 [Ver->Asn]: Using exceptions inside usort() callback function causes a warning
  • "Fri, 05 Mar 2010 16:41:30 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • stas@php.netThu, 01 Apr 2010 00:12:54 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • ajrattink at correct dot netMon, 31 May 2010 15:24:09 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • philipwhiuk at hotmail dot comThu, 07 Oct 2010 21:34:55 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • poehler at interworx dot comMon, 10 Oct 2011 21:44:56 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • eric_haney at yahoo dot comTue, 21 Feb 2012 22:56:31 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • keith at breadvault dot comFri, 24 Feb 2012 18:04:02 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • mbrowne83 at gmail dot comWed, 08 Aug 2012 17:53:58 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • andrejs dot verza at gmail dot comMon, 17 Jun 2013 11:11:07 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • jakub dot lopuszanski at nasza-klasa dot plTue, 09 Jul 2013 07:21:19 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • m at rtin dot soMon, 19 Aug 2013 18:23:17 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • m at rtin dot soMon, 19 Aug 2013 19:04:24 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • nikic@php.netSat, 18 Jul 2015 14:17:54 +0000Bug #50688 [Asn]: Using exceptions inside usort() callback function causes a warning
  • albert at mediatribe dot netFri, 27 May 2016 21:01:26 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • love at sickpeople dot seTue, 28 Mar 2017 00:07:54 +0000Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning
  • nikic@php.netWed, 06 Dec 2017 18:14:54 +0000Bug #50688 [Asn->Csd]: Using exceptions inside usort() callback function causes a warning