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Doc Bug #41697 Impossible to compare simpleXML Objects
Submitted: 2007-06-15 07:53 UTC Modified: 2007-08-17 02:14 UTC
From: judas dot iscariote at gmail dot com Assigned: rrichards (profile)
Status: Closed Package: Documentation problem
PHP Version: 5CVS-2007-06-15 (CVS) OS: Irrelevant
Private report: No CVE-ID: None
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From: judas dot iscariote at gmail dot com
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 [2007-06-15 07:53 UTC] judas dot iscariote at gmail dot com 
Description:
------------
You cannot compare simpleXML Objects.


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

$xmlstring = '<?xml version="1.0" standalone="yes"?><foo></foo>';


$foo = new SimpleXMLElement($xmlstring);

$bar = new SimpleXMLElement($xmlstring);

/* "Two object instances are equal if they have the same attributes and values, and are instances of the same class" */

var_dump($foo == $bar);

/* object are identical if and only if they refer to the same instance of the same class.*/

var_dump($foo === $bar);

?>

Expected result:
----------------
//the are equal
bool(true)
//but not indentical
bool(false)


Actual result:
--------------
bool(false)
bool(false)

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 [2007-06-25 18:43 UTC] tony2001@php.net 
As far as I know, there is no way to compare two different Libxml document pointers, so the result is correct.
Rob, please correct me if I'm wrong.
 [2007-06-26 12:32 UTC] rrichards@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

Tony's assessment is correct
 [2007-06-27 08:46 UTC] judas dot iscariote at gmail dot com 
This gotcha should be mentioned in the documentation then .
 [2007-08-17 02:14 UTC] vrana@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.

"Extensions can define own rules for their objects comparison."
 
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