Bug #50688 [Com]: Using exceptions inside usort() callback function causes a warning

Edit report at https://bugs.php.net/bug.php?id=50688&edit=1

 ID:                 50688
 Comment by:         love at sickpeople dot se
 Reported by:        jcampbell at remindermedia dot com
 Summary:            Using exceptions inside usort() callback function
                     causes a warning
 Status:             Assigned
 Type:               Bug
 Package:            Arrays related
 Operating System:   Fedora Core 12
 PHP Version:        5.*, 6
 Assigned To:        stas
 Block user comment: N
 Private report:     N

 New Comment:

This bug should be closed as Fixed, since it's fixed in PHP 7 and 5.6 does not have active support.


Previous Comments:
------------------------------------------------------------------------
[2016-05-27 21:01:23] albert at mediatribe dot net

A notice within the compare function will also trigger this notice. For example:

function test($a, $b) {
  return strnatcmp($a['name'], $b['name']);
}
$e = array(
  array(
    'not-name' => 'a',
  ),
  array(
    'name' => '',
  ),
);
uasort($e, 'test');

(this is tested on PHP 5.3)

------------------------------------------------------------------------
[2016-01-03 14:46:18] white06tiger+PHPbug at gmail dot com

Related To: Bug #71238

------------------------------------------------------------------------
[2015-07-18 14:17:52] [email protected]

This has been fixed in PHP 7.

------------------------------------------------------------------------
[2013-08-19 19:04:24] m at rtin dot so

Sorry the use () isn't relevant, I forgot to remove it when simplifying my test 
case

------------------------------------------------------------------------
[2013-08-19 18:23:17] m at rtin dot so

I ran into a similar issue, i'm sure it'll require the same patch as it's the 
backtrace causing the problem but worth noting it doesn't require an exception to 
trigger this, just a backtrace.

$ cat usort.php
<?php
 
set_error_handler(function($errno, $errstr) {
  $bt = debug_backtrace();
  var_dump($errstr);
});
 
$arr = [1, 2];
usort($arr, function($a, $b) use ($arr) {
  trigger_error('test');
  return $a > $b;
});
 
$ php usort.php
string(4) "test"
string(59) "usort(): Array was modified by the user comparison function"

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


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