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
“baz”. 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) {

    …

  }

}

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

Reply via email to