How to remove entity declarations from XML in PHP -

i'm trying remove <!entity definitions xml file without success, thought using following snippet output contain no traces of entity definitions i'm wrong.

how can achieve goal?

i no error message beside domdocument::loadxml(): xmlns: uri &ns_svg; not absolute in entity

a little context:

i'm embedding svg inside another, <!entity gives me kind of problem, i'm thinking of using libxml_noent , deleting <!entity definitions.

the php:

<?php  header('content-type: text/plain'); $str = file_get_contents(dirname(__file__) . '/test2.svg');    $document = new domdocument(); $document->loadxml($str);  foreach ($document->doctype->entities $entity) {     $entity->parentnode->removechild($entity); // thought remove <!entity declaration }  echo $document->savexml(); // --> want xml without <!entity ns_svg "http://www.w3.org/2000/svg"> , <!entity ns_xlink "http://www.w3.org/1999/xlink"> 

the xml:

<?xml version="1.0" encoding="utf-8"?> <!-- generator: adobe illustrator 12.0.1, svg export plug-in . svg version: 6.00 build 51448)  --> <!doctype svg public "-//w3c//dtd svg 1.1//en" "http://www.w3.org/graphics/svg/1.1/dtd/svg11.dtd" [     <!entity ns_svg "http://www.w3.org/2000/svg">     <!entity ns_xlink "http://www.w3.org/1999/xlink"> ]> <svg  version="1.1"      id="bundesschild" sodipodi:version="0.32" xmlns:cc="http://web.resource.org/cc/" xmlns:sodipodi="http://inkscape.sourceforge.net/dtd/sodipodi-0.dtd" inkscape:version="0.43" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:svg="http://www.w3.org/2000/svg" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" sodipodi:docbase="d:\kuvat\wikipedia" sodipodi:docname="flag_of_germany_(state).svg"      xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" width="250" height="275" viewbox="0 0 250 275"      overflow="visible" enable-background="new 0 0 250 275" xml:space="preserve"> <path id="schild" fill="#ffce00" stroke="#000000" d="m235.885,2.558c0,0,0,131.825,0,171.735     c0,54.121-50.504,98.265-112.501,98.265c-61.996,0-112.5-44.144-112.5-98.265c0-39.91,0-171.735,0-171.735h235.885z"/> </svg> 

the output:

<?xml version="1.0" encoding="utf-8"?> <!-- generator: adobe illustrator 12.0.1, svg export plug-in . svg version: 6.00 build 51448)  --> <!doctype svg public "-//w3c//dtd svg 1.1//en" "http://www.w3.org/graphics/svg/1.1/dtd/svg11.dtd" [ <!entity ns_svg "http://www.w3.org/2000/svg"> <!-- why still here???? --> <!entity ns_xlink "http://www.w3.org/1999/xlink"> <!-- why still here???? --> ]> <svg xmlns:cc="http://web.resource.org/cc/" xmlns:sodipodi="http://inkscape.sourceforge.net/dtd/sodipodi-0.dtd" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:svg="http://www.w3.org/2000/svg" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" version="1.1" id="bundesschild" sodipodi:version="0.32" inkscape:version="0.43" sodipodi:docbase="d:\kuvat\wikipedia" sodipodi:docname="flag_of_germany_(state).svg" width="250" height="275" viewbox="0 0 250 275" overflow="visible" enable-background="new 0 0 250 275" xml:space="preserve"> <path id="schild" fill="#ffce00" stroke="#000000" d="m235.885,2.558c0,0,0,131.825,0,171.735  c0,54.121-50.504,98.265-112.501,98.265c-61.996,0-112.5-44.144-112.5-98.265c0-39.91,0-171.735,0-171.735h235.885z"/> </svg> 

you can remove whole document type node. entities not seem child nodes of it. before should substitute entities using libxml_noent:

$document = new domdocument(); $document->loadxml($xml, libxml_noent);  $document->removechild($document->doctype);  echo $document->savexml(); 

the way keep document type found, creating new document document type , copy nodes it.

$document = new domdocument(); $document->loadxml($xml, libxml_noent);  $existingdocumenttype = $document->doctype; if (null !== $existingdocumenttype) {   $implementation = new domimplementation;   $newdocumenttype = $implementation->createdocumenttype(     $existingdocumenttype->name,      $existingdocumenttype->publicid,      $existingdocumenttype->systemid   );   $newdocument = $implementation->createdocument(null, null, $newdocumenttype);   foreach ($document->childnodes $node) {     $copy = $newdocument->importnode($node, true);     if ($copy) {       $newdocument->appendchild($copy);     }   }   $document = $newdocument; }  echo $document->savexml(); 

document type nodes can not imported document, domdcoument::importnode() return false it.

if @ standard domdocumenttype::entitites domnamednodemap , should have method removenameditem(). if call php outputs:

warning: domnamednodemap::removenameditem(): not yet implemented in ... on line ...