Req #52751 [Com]: XPath processing-instruction() function is not supported.
| From: | ivan dot enderlin at hoa-project dot net | Date: | Tue, 31 Aug 2010 09:52:08 +0000 |
| Subject: | Req #52751 [Com]: XPath processing-instruction() function is not supported. | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-153972@lists.php.net to get a copy of this message | ||
Edit report at http://bugs.php.net/bug.php?id=52751&edit=1
ID: 52751
Comment by: ivan dot enderlin at hoa-project dot net
Reported by: ivan dot enderlin at hoa-project dot net
Summary: XPath processing-instruction() function is not
supported.
Status: Open
Type: Feature/Change Request
Package: *XML functions
Operating System: All
PHP Version: Irrelevant
Block user comment: N
New Comment:
I forget to notice that DOMXPath support this function.
If we take the first code example:
$doc = dom_import_simplexml($sxe)->ownerDocument;
$xpath = new DOMXPath($doc);
$e = $xpath->query('//processing-instruction(\'baz\')');
var_dump($e, $e->length, $e->item(0)->data);
It will output:
object(DOMNodeList)#8 (0) {
}
int(1)
string(11) "href="ftw" "
That's what we expected!
But I think that SimpleXML does not simply support PI.
Maybe you noticed that when outputing //bar, in the 2 offset, we have
âbazâ. Well, try to use it:
$handle = $sxe->xpath('//bar');
var_dump(
dom_import_simplexml($handle[2])
->childNodes
->item(0)
->data
);
It will output:
string(11) "href="ftw" "
We must use the DOM API to reach PI data.
Conclusion:
⢠processing-instruction() works with DOMXpath, not with SimpleXML.
⢠PIs appear in the DOM and the SimpleXML tree.
⢠PIs are usable only with the DOM API.
Previous Comments:
------------------------------------------------------------------------
[2010-08-31 11:24:13] ivan dot enderlin at hoa-project dot net
Description:
------------
SimpleXML misses a XPath function which is processing-instruction().
This last one enables to reach/select PIs along the XML document.
Test script:
---------------
<?php
$xml = '<?xml version="1.0" encoding="utf-8"?>' .
"\n\n" .
'<foo>' . "\n" .
' <bar>Gordon</bar>' . "\n" .
' <bar><![CDATA[Gordon]]></bar>' . "\n" .
' <bar><?baz href="ftw" ?></bar>' . "\n" .
'</foo>';
$sxe = simplexml_load_string($xml);
var_dump(
$sxe->xpath('//bar')
);
var_dump(
$sxe->xpath('//processing-instruction(\'baz\')')
);
Expected result:
----------------
//bar
array(3) {
[0]=>
object(SimpleXMLElement)#2 (1) {
[0]=>
string(6) "Gordon"
}
[1]=>
object(SimpleXMLElement)#3 (0) {
}
[2]=>
object(SimpleXMLElement)#4 (1) {
["baz"]=>
object(SimpleXMLElement)#5 (0) {
}
}
}
//processing-instruction('baz')
array(1) {
[2]=>
object(SimpleXMLElement)#6 (1) {
â¦
}
}
Actual result:
--------------
//bar
array(3) {
[0]=>
object(SimpleXMLElement)#2 (1) {
[0]=>
string(6) "Gordon"
}
[1]=>
object(SimpleXMLElement)#3 (0) {
}
[2]=>
object(SimpleXMLElement)#4 (1) {
["baz"]=>
object(SimpleXMLElement)#5 (0) {
}
}
}
//processing-instruction('baz')
array(0) {
}
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=52751&edit=1