From:             ladislav at marek dot su
Operating system: Linux
PHP version:      5.4Git-2012-08-30 (Git)
Package:          Class/Object related
Bug Type:         Bug
Bug description:array_unique() misbehaves with array of DateTimes

Description:
------------
array_unique() returns duplicates for array which contains objects with
DateTime 
instances.

Test script:
---------------
<?php

class Foo
{
        public $dt;

        function __construct($dt)
        {
                $this->dt = $dt;
        }
}

$foo = new Foo(new DateTime);
$std = new stdClass;
$arr = [$foo, $foo, $std, $std, $std];

var_dump(array_unique($arr, SORT_REGULAR));

Expected result:
----------------
array(4) {
  [0]=>
  object(Foo)#1 (1) {
    ["dt"]=>
    object(DateTime)#2 (3) {
      ["date"]=>
      string(19) "2012-08-30 15:18:01"
      ["timezone_type"]=>
      int(3)
      ["timezone"]=>
      string(13) "Europe/Prague"
    }
  }
  [2]=>
  object(stdClass)#3 (0) {
  }
}

Actual result:
--------------
array(4) {
  [0]=>
  object(Foo)#1 (1) {
    ["dt"]=>
    object(DateTime)#2 (3) {
      ["date"]=>
      string(19) "2012-08-30 15:18:01"
      ["timezone_type"]=>
      int(3)
      ["timezone"]=>
      string(13) "Europe/Prague"
    }
  }
  [1]=>
  object(Foo)#1 (1) {
    ["dt"]=>
    object(DateTime)#2 (3) {
      ["date"]=>
      string(19) "2012-08-30 15:18:01"
      ["timezone_type"]=>
      int(3)
      ["timezone"]=>
      string(13) "Europe/Prague"
    }
  }
  [2]=>
  object(stdClass)#3 (0) {
  }
  [4]=>
  object(stdClass)#3 (0) {
  }
}

-- 
Edit bug report at https://bugs.php.net/bug.php?id=62977&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=62977&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=62977&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=62977&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=62977&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=62977&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=62977&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=62977&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=62977&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=62977&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=62977&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=62977&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=62977&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=62977&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=62977&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=62977&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=62977&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=62977&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=62977&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=62977&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=62977&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=62977&r=mysqlcfg

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