Edit report at http://bugs.php.net/bug.php?id=46143&edit=1
ID: 46143
Comment by: MartinWillms2000 at aol dot com
Reported by: firehed at gmail dot com
Summary: Serializing SimpleXML removes the root node; asXML
on unserailized breaks
Status: Bogus
Type: Bug
Package: SimpleXML related
Operating System: OS X 10.5
PHP Version: 5.2.6
Block user comment: N
Private report: N
New Comment:
I have the same problem when using simplexml and reading a string entry
from a
node. The node contents is the following:
/mtdata/usb/data
I use the following code to read the node contents into a variable:
$temp_str = $xmlJobFile_cl->recording->target_directory;
Using this code the problem described above occurs. Therefore I think
that the
simplexml node is serialised to $temp_str. Applying a type cast to
string
solved the problem:
$temp_str = (string) $xmlJobFile_cl->recording->target_directory;
>php-config --version
5.2.6
>apache2ctl -v
Server version: Apache/2.2.3
Server built: Sep 25 2008 11:25:06
Previous Comments:
------------------------------------------------------------------------
[2008-10-16 18:09:56] [email protected]
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
For reasons as stated by phpwnd
------------------------------------------------------------------------
[2008-09-21 15:12:06] phpwnd at gmail dot com
AFAIK, you cannot serialize a SimpleXMLElement, because it's a resource
wrapped inside an object and it would be impossible de restore that
resource upon unserialize()-ation. That's why you receive an error: the
unserialized object doesn't know where's the original document anymore.
Store it in text form instead (asXML()).
Proposed solution #1: prevent SimpleXMLElement serialization, or make it
produce an E_NOTICE. The error message could advise the user to store
SimpleXMLElements as XML strings instead.
Proposed solution #2: allow serialization, make the serialized
representation store the XML as a string and recreate the [copy of the
original] document upon deserialization.
------------------------------------------------------------------------
[2008-09-21 11:37:24] firehed at gmail dot com
Description:
------------
If you serialize a SimpleXMLElement object, the root-level node is lost,
causing the unserialize() event to issue a warning-level error (and
creating an empty SimpleXMLElement object) and cause most other
SimpleXMLElement methods to fail with a warning-level error.
Reproduce code:
---------------
<?php
$xml = new SimpleXMLElement('<test><foo>1</foo><bar>2</bar></test>');
$serialized = serialize($xml);
$unserialized = unserialize($serialized);
$unserialized->addChild('testing', 'worked');
echo $unserialized->asXML();
Expected result:
----------------
<?xml version="1.0"?>
<test><foo>1</foo><bar>2</bar><testing>worked</testing></test>
Actual result:
--------------
Warning: unserialize() [function.unserialize]: Node no longer exists in
/Applications/MAMP/htdocs/serialxml.php on line 4
Warning: SimpleXMLElement::addChild()
[function.SimpleXMLElement-addChild]: Node no longer exists in
/Applications/MAMP/htdocs/serialxml.php on line 5
Warning: SimpleXMLElement::addChild()
[function.SimpleXMLElement-addChild]: Cannot add child. Parent is not a
permanent member of the XML tree in
/Applications/MAMP/htdocs/serialxml.php on line 5
Warning: SimpleXMLElement::asXML() [function.SimpleXMLElement-asXML]:
Node no longer exists in /Applications/MAMP/htdocs/serialxml.php on line
6
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=46143&edit=1
