From:
Operating system:
PHP version: 5.3SVN-2010-07-27 (SVN)
Package: SimpleXML related
Bug Type: Bug
Bug description:spl_object_hash() has strange behaviors with SimpleXML
Description:
------------
Hey :-),
spl_object_hash() has strange behaviors with SimpleXML.
You know that SimpleXMLElement uses properties to access to its children
collection and array-access to reach a specific child into this
collection.
So, if we want to reach an element, we have to do: $sxe->element[0] for
example. Unfortunately, it appears to always return a ânew objectâ
according to spl_object_hash(). Please, see the code below.
You can notice that $sxe->p has sometimes the same has than $sxe-p[0]. And
why $sxe-p[0] has most of the time a different hash?
Test script:
---------------
<?php
$xml = '<?xml version="1.0" encoding="utf-8"?>' . "\n\n" .
'<page>' . "\n" .
' <p>Foobar</p>' . "\n" .
'</page>';
$sxe = simplexml_load_string($xml);
function f ( $e ) {
return spl_object_hash($e);
}
var_dump(f($sxe->p));
var_dump(f($sxe->p));
var_dump(f($sxe->p[0]));
var_dump(f($sxe->p[0]));
var_dump(f($sxe->p[0]));
var_dump(f($sxe->p[0]));
var_dump(f($sxe->p[0]));
var_dump(f($sxe->p[0]));
echo "\n" . 'Light!' . "\n\n";
function g ( $e ) {
return substr(f($e), 14, 2);
}
var_dump(g($sxe->p));
var_dump(g($sxe->p));
var_dump(g($sxe->p[0]));
var_dump(g($sxe->p[0]));
var_dump(g($sxe->p[0]));
var_dump(g($sxe->p[0]));
var_dump(g($sxe->p[0]));
var_dump(g($sxe->p[0]));
Expected result:
----------------
string(32) "000000005cddd92f000000002401191e"
string(32) "000000005cddd92f000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd929000000002401191e"
Light!
string(2) "2f"
string(2) "2f"
string(2) "29"
string(2) "29"
string(2) "29"
string(2) "29"
string(2) "29"
string(2) "29"
Actual result:
--------------
string(32) "000000005cddd92f000000002401191e"
string(32) "000000005cddd92f000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd92e000000002401191e"
string(32) "000000005cddd92f000000002401191e"
string(32) "000000005cddd929000000002401191e"
string(32) "000000005cddd92e000000002401191e"
string(32) "000000005cddd92f000000002401191e"
Light!
string(2) "2f" // p
string(2) "2f" // p, same hash, oof
string(2) "29" // p[0], ok
string(2) "2e" // p[0], huh?
string(2) "2f" // p[0], has the hash that p⦠why?
string(2) "29" // p[0], like the first p[0]
string(2) "2e" // p[0], we have a loop here
string(2) "2f" // p[0], definitively, we have a loop.
--
Edit bug report at http://bugs.php.net/bug.php?id=52458&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52458&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52458&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52458&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52458&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52458&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52458&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52458&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52458&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52458&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52458&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52458&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52458&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52458&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52458&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52458&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52458&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52458&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52458&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52458&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52458&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52458&r=mysqlcfg
