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Bug #37669 Setting a node's value from array returned by xpath does not work
Submitted: 2006-06-02 00:44 UTC Modified: 2006-12-30 13:42 UTC
Votes:2
Avg. Score:5.0 ± 0.0
Reproduced:2 of 2 (100.0%)
Same Version:2 (100.0%)
Same OS:1 (50.0%)
From: justinpatrin@php.net Assigned: helly (profile)
Status: Not a bug Package: SimpleXML related
PHP Version: 5.1.4 OS: Linux (Gentoo, RHEL)
Private report: No CVE-ID: None
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 [2006-06-02 00:44 UTC] justinpatrin@php.net 
Description:
------------
When trying to set the value (inside text) of a node from an array returned from an xpath call nothing happens. Setting an attribute works fine, however. Setting via normal -> access works as expected.

Reproduce code:
---------------
$xml = simplexml_load_string('<root><node/><node2/></root>');
if (is_array($nodes = $xml->xpath('node'))
    && sizeof($nodes) > 0
    && is_object($nodes[0])) {
    $nodes[0]['value'] = 'Hello';
    $nodes[0] = 'World';
}
$xml->node2 = 'World';
header('Content-Type: text/xml');
echo $xml->asXML();


Expected result:
----------------
<root><node value="Hello">World</node><node2>World</node2></root>

Actual result:
--------------
<root><node value="Hello"/><node2>World</node2></root>

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 [2006-06-02 04:39 UTC] justinpatrin@php.net 
I've come up with a workaround which imports the SimpleXML obkect into DOM and then converts back, but this, of course, defeats the purpose of SimpleXML. For reference I will post it here for others who need a solution to this problem:

$domnode = dom_import_simplexml($xml);
$dom = new DOMDocument();
$domnode = $dom->importNode($domnode, true);
$dom->appendChild($domnode);
$x = new DOMXPath($dom);
$n = $x->evaluate('/root/node');
while ($n->item(0)->firstChild) {
    $n->item(0)->removeChild($n->firstChild);
}
$n->item(0)->appendChild($dom->createTextNode('World'));
$xml = simplexml_import_dom($dom);
 [2006-06-20 14:25 UTC] tony2001@php.net 
Marcus, could you pla take a look at it?
 [2006-12-30 13:42 UTC] rrichards@php.net 
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

You have to use DOM there. All you were doing was replacing the item at index 0 in the $nodes array with the string "World".
 
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