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Bug #6526

open

PHP API xdmNode->axisNodes(3) returns the XdmNode itself instead of its children

Added by Martin Honnen about 2 months ago. Updated about 1 month ago.

Status:
New
Priority:
Normal
Assignee:
O'Neil Delpratt
Category:
PHP API
Start date:
2024-09-10
Due date:
% Done:

0%

Estimated time:
Applies to branch:
12
Fix Committed on Branch:
Fixed in Maintenance Release:
Found in version:
12.5
Fixed in version:
SaxonC Languages:
SaxonC Platforms:
All
SaxonC Architecture:

Description

Trying to use axisNodes(3) with PHP to find the child nodes of an XdmNode, I get some strange results, I don't get an XdmValue containing a sequence of nodes but I get an XdmNode which seems to be the same as the method is called on.

Sample code is e.g.

<?php
$xml = <<<XML
<root att1="value 1" att2="value 2">
  <foo>bar</foo>
</root>
<!-- comment 1 -->
XML;

$saxonProc = new Saxon\SaxonProcessor();

$xdmNode = $saxonProc->parseXmlFromString($xml);

echo $xdmNode->getChildCount() . "\n";

$childrenAxis = $xdmNode->axisNodes(3);

var_dump($childrenAxis);

echo get_class($childrenAxis) . "\n";

echo $childrenAxis . "\n";


echo $childrenAxis->getNodeKind() . "\n";

$xdmNode =  $xdmNode->getChildNode(0);

echo $xdmNode->getChildCount() . "\n";

$childrenAxis = $xdmNode->axisNodes(3);

var_dump($childrenAxis);

echo get_class($childrenAxis) . "\n";

echo $childrenAxis . "\n";


echo $childrenAxis->getNodeKind() . "\n";

unset($childrenAxis);

unset($xdmNode);

unset($saxon_proc);

?>

and output for me (with SaxonC HE 12.5 under Ubuntu 24 WSL with PHP 8.3) is

2
object(Saxon\XdmNode)#3 (0) {
}
Saxon\XdmNode
<root att1="value 1" att2="value 2">
   <foo>bar</foo>
</root>

<!-- comment 1 -->
0
3
object(Saxon\XdmNode)#2 (0) {
}
Saxon\XdmNode

<foo>bar</foo>
0
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 #1

Updated by Martin Honnen about 1 month ago

It seems axisNodes from PHP is broken for other axis as well, today I have the preceding sibling axis with e.g.

<?php
$xml = <<<XML
<!-- comment 1 -->
<?pi test?>
<root att1="value 1" att2="value 2">
  <foo>bar</foo>
  <foo>baz</foo>
</root>
<!-- comment 2 -->
XML;

$saxonProc = new Saxon\SaxonProcessor();

$xdmNode = $saxonProc->parseXmlFromString($xml);

echo $xdmNode->getChildCount() . "\n";

$xpathProc = $saxonProc->newXPathProcessor();
$xpathProc->setContextItem($xdmNode);

$xdmItem = $xpathProc->evaluateSingle('/comment()[last()]');

echo "$xdmItem\n";

echo $xdmItem->isNode() . "\n";

$xdmNode2 = $xdmItem->getNodeValue();

echo "$xdmNode2\n";

$siblingNodes = $xdmNode2->axisNodes(11);

var_dump($siblingNodes);

echo get_class($siblingNodes) . "\n";

echo "$siblingNodes\n";

unset($siblingNodes);

unset($xdmNode);

unset($xdmNode2);

unset($saxon_proc);

?>

but the result is an error

4
<!-- comment 2 -->
1
<!-- comment 2 -->
NULL
PHP Fatal error:  Uncaught TypeError: get_class(): Argument #1 ($object) must be of type object, null given in /home/mh/axisNodesTest2.php:35
Stack trace:
#0 {main}
  thrown in /home/mh/axisNodesTest2.php on line 35

so somehow it appears in PHP $xdmNode2->axisNodes(11) returns NULL while the node has three preceding sibling nodes (when using the Python API).

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