[PHP] Re: SimpleXML and documentation

[Tobias Bradtke]

hm.. attachement didn't work.
here is the script:


<?php

echo "<pre>";

// at first:
// sorry for my bad english! =)

// i'm using php5beta3 on win32


// some interessting links:
//
// http://www.w3.org/TR/DOM-Level-2-Core/core.html
//


$xml_string = "
   <books>
      <book id='22'>
         <title attr='attr'>The Grapes of Wrath</title>
         <author>John Steinbeck</author>
      </book>
      <book id='23'>
         <title>The Pearl</title>
         <author>John Steinbeck</author>
      </book>
      <test>
         <dog>
            <snout>
               <cat>
                  <stomach>
                     <mouse />
                  </stomach>
               </cat>
            </snout>
         </dog>
      </test>
      <test />
      <test />
      <test />
   </books>
   ";

$sxe = simplexml_load_string($xml_string);


// i can't call sxe_dump() twice in this script
// causes crash.. (?)

//echo sxe_dump($sxe);
//echo sxe_dump($sxe);



// you can read and write the content of a node
echo $sxe->book[0]->title;
$sxe->test[0]->dog->snout->cat->stomach = "cat food";


// you can add/set an attribute
$sxe->test[0]->dog['mood'] = "evil";


// and remove it again
unset($sxe->test[0]->dog['mood']);


// but i don't know how to add another dog:
// $sxe->test[0]->dog[1]-> "test";
// ^conflicts with adding/setting attributes, i think


// and i can't add another element:
// (no error, but no effect too)
$sxe->newelement = "text_text";

// error; thinks 'newelement' is an attribute
$sxe->newelement = simplexml_load_string("<text_text>bla</text_text>");

// no error, no effect:
$sxe->newelement[] = simplexml_load_string("<text_text>bla</text_text>");


// to add a new element you can workaround with this:
// first you export the simplexml to dom.
// then you can append (or whatever) a new created child
// this immediatly takes effect on the $sxe! :) great!
//
// the create_node_from_string() is listed below
// only one line, unfortunately you have to pass
// the 'ownerDocument' or the new document-part
// can't be imported correctly..


// comment these two lines
// if you want to manipulate the search-result below..
$dom = dom_import_simplexml($sxe);
$dom->appendChild(create_node_from_string($dom->ownerDocument,
"<book><title>new_book</title><isbn>456</isbn></book>"));


// you also can manipulate xsearch-results directly:

$xsearch = $sxe->xsearch('[EMAIL PROTECTED]"23"]');
print_r($xsearch);


// for me this doesn't work if i did append the child above
// you can uncomment these two lines
// if you comment out the lines above
//
// :(

/*
$dom = dom_import_simplexml($xsearch[0]);
$dom->appendChild(create_node_from_string($dom->ownerDocument,
"<isbn>123abc</isbn>"));
*/




echo "<br /><br />";
echo sxe_dump($sxe);




// mayby some interesting output..
echo "<br /><br />";
print_r(get_class_methods('simplexml_element'));
print_r(get_class_methods('domelement'));
print_r(get_class_methods('domnode'));




exit;



function create_node_from_string($document, $xml_string)
{
   return
$document->importNode(dom_import_simplexml(simplexml_load_string($xml_string)),
true);
}




function sxe_dump($sxe)
{
   // tag_name
   $tagName = dom_import_simplexml($sxe)->nodeName;

   $echo = "<span style='color:#007700'>&lt;</span><span
style='color:#0000BB'>$tagName</span>";

   // attributes
   foreach ($sxe->attributes() as $attributeName => $attributeValue)
      $echo .= " <span style='color:#0000BB'>$attributeName=</span><span
style='color:#DD0000'>\"$attributeValue\"</span>";

   $count = count(get_object_vars($sxe));
   if ($count or (string)$sxe)
   {
      // nodeValue
      $echo .= "<span style='color:#007700'>&gt;</span>".trim($sxe);

      // child_nodes
      if ($count)
      {
         $echo .= "<div style='margin:0 1em'>";
         foreach ($sxe as $childNode)
            $echo .= sxe_dump($childNode)."<br />";
         $echo .= "</div>";
      }

      // close tag_name
      $echo .= "<span style='color:#007700'>&lt;/</span><span
style='color:#0000BB'>$tagName</span><span
style='color:#007700'>&gt;</span>";
   }
   else
   {
      // close empty tag_name
      $echo .= " <span style='color:#007700'>/&gt;</span>";
   }

   return $echo;
}

?>

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