ID: 41663
User updated by: kenashkov at gmail dot com
Reported By: kenashkov at gmail dot com
Status: Bogus
Bug Type: SimpleXML related
Operating System: Fedora Core 4
PHP Version: 5.2.3
New Comment:
Yes, I experienced strange behaviour with the relative path (exactly in
a function - like the example I gave) and this is why I gave now the
example with absolute path.
I just expected clone to get the node out of the structure.
Case closed.
Previous Comments:
------------------------------------------------------------------------
[2007-06-12 13:08:00] [EMAIL PROTECTED]
Still incorrect:
The cloned node is still part of the document (just not linked in).
Using / causes expression to be evaluated against the document.
/* will select the top level element in the same document as the
context node
Use ./ to evaluate against and in scope of context node
Note: There was a bug in earlier versions of SimpleXML (pre 5.2 I
believe) where the relative path didn't work correctly against the
context.
------------------------------------------------------------------------
[2007-06-12 12:50:48] kenashkov at gmail dot com
Yes - I use absolute expression. But at least in the last example [3]:
$z = clone $x->level1_node1[0];
$r3 = $z->xpath('/*');
print $r3[0]->getName().' ';
I use the $z object - not the x. And the $z object does not has any
node called rootnode. The expression is again evaluated against the $x
structure, not the $z.
This could be a problem in the case:
$z = clone $x->level1_node1[0];
function do_something($z)
{
$z->xpath('/*');//some absolute expression
}
Where the function do_something is totally unaware of the existance of
the $x var. If this is still expected then how one can evaluate an
absolute xpath expression inside the do_something function, as it will
always do it for the $x structure, not the locally available $z
structure.
I think at least this must be documented and a workaround must be
provide in the docs.
------------------------------------------------------------------------
[2007-06-12 12:44:16] [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
The results are exactly what you requested based on your XPath
expression. You used absolute paths not relative:
http://www.w3.org/TR/xpath#location-paths
------------------------------------------------------------------------
[2007-06-12 08:10:55] kenashkov at gmail dot com
Description:
------------
The evaluation of the Xpath expressions is not relative to the node
against which they are called ([2]). Worse - even after cloning a node
from the structure and evaluating the xpath, the xpath expression seems
to be evaluated against the original structure, not against the new one
(which is a copy of a part of the original) ([3]).
This was discussed in the dev-list here:
http://marc.info/?l=php-dev&m=118001203709813&w=2
If this is not a bug, but expected result, I think a note addressing
this behaviour must be added in the docs.
Reproduce code:
---------------
$str =
'<rootnode><level1_node1><level2_node1></level2_node1></level1_node1><level1_node2></level1_node2></rootnode>';
$x = new SimpleXMLElement($str);
//[1]
$r1 = $x->xpath('/*');
print $r1[0]->getName().' ';
//[2]
$r2 = $x->level1_node1[0]->xpath('/*');
print $r2[0]->getName().' ';
//[3]
$z = clone $x->level1_node1[0];
$r3 = $z->xpath('/*');
print $r3[0]->getName().' ';
Expected result:
----------------
rootnode level1_node1 level1_node1
Actual result:
--------------
rootnode rootnode rootnode
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=41663&edit=1
