Bug #50670 [Opn->Ver]: Incorrect Iteration over large (10k elements) xml file
Edit report at http://bugs.php.net/bug.php?id=50670&edit=1
ID: 50670
Updated by: mike@php.net
Reported by: niklas at frubar dot net
Summary: Incorrect Iteration over large (10k elements) xml file
-Status: Open
+Status: Verified
Type: Bug
-Package: SimpleXML related
+Package: Scripting Engine problem
Operating System: Linux 2.6.9 x86_64
PHP Version: 5.3.*
New Comment:
Works with zend.enable_gc=0
Previous Comments:
------------------------------------------------------------------------
[2010-01-14 15:18:18] niklas at frubar dot net
Reproduce Code
--------------
<?php
$xml = <<<XML
<?xml version="1.0"?>
<rowset>
XML;
for($i = 1; $i < 15000; $i++) $xml .= '<row id="' . $i . '"
/>';
$xml .= <<<XML
</rowset>
XML;
function traverse($node)
{
static $list;
foreach ($node->children() as $child) traverse($child);
$list[] = $node->attributes();
echo $node['id'] . "\n";
}
traverse(new SimpleXMLElement($xml));
?>
------------------------------------------------------------------------
[2010-01-11 09:16:28] jani@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
------------------------------------------------------------------------
[2010-01-05 20:04:17] matth at mlalonde dot net
Same results in 5.2.9 as with 5.2.12.
------------------------------------------------------------------------
[2010-01-05 19:37:23] niklas at frubar dot net
It works with other array values, if you replace
$list[] = $node->attributes();
with
$c = array();
$list[] = $c;
it resets the iteration at the same node.
$list[] = array();
does not reset the iteration however.
$list[] = new stdClass();
does reset the iteration.
Adding simple integers or strings to the array do not reset.
------------------------------------------------------------------------
[2010-01-05 18:57:45] niklas at frubar dot net
Description:
------------
When iterating over a large xml object and storing attributes of all
nodes in an array, somehow the iteration gets reset (always at the same
element)
Tested with 5.3.1 and php-5.3 svn HEAD, does not occur on php-5.2.12.
Reproduce code:
---------------
<?php
function traverse($node)
{
static $list;
foreach ($node->children() as $child) traverse($child);
$list[] = $node->attributes();
echo $node['id'] . "\n";
}
traverse(new SimpleXMLElement('data.xml', null, true));
data.xml:
<?xml version="1.0"?>
<rowset>
<row id="1" />
[...]
<row id="14999" />
</rowset>
Expected result:
----------------
1
2
3
[.. continuous numbers ..]
14997
14998
14999
Actual result:
--------------
1
2
3
[.. continuous numbers ..]9994
9995
9996
2
3
4
[.. continuous numbers ..]
14997
14998
14999
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=50670&edit=1
Thread (7 messages)