PHP XML parser CDATA keyword missing after parse - php

Question

I have the following XML code which I want to read and get the value inside "content" tag.
"<?xml version='1.0' encoding='ISO-8859-1'?>
<ad modelVersion='0.9'>
<richmediaAd>
<content>
<![CDATA[<script src=\"mraid.js\"></script>
<div class=\"celtra-ad-v3\">
<img src=\"data: image/png, celtra\" style=\"display: none\"onerror=\"(function(img){ varparams={ 'channelId': '45f3f23c','clickUrl': 'http%3a%2f%2fexamplehost.com%3a53766%2fCloudMobRTBWeb%2fClickThroughHandler.ashx%3fadid%3de6983c95-9292-4e16-967d-149e2e77dece%26cid%3d352%26crid%3d850'};varreq=document.createElement('script');req.id=params.scriptId='celtra-script-'+(window.celtraScriptIndex=(window.celtraScriptIndex||0)+1);params.clientTimestamp=newDate/1000;req.src=(window.location.protocol=='https: '?'https': 'http')+': //ads.celtra.com/e7f5ce18/mraid-ad.js?';for(varkinparams){req.src+='&'+encodeURIComponent(k)+'='+encodeURIComponent(params[ k ]); }img.parentNode.insertBefore(req, img.nextSibling);})(this);\"/>
</div>]]>
</content>
<width>320</width>
<height>50</height>
</richmediaAd>
</ad>"
I tried 2 methods (SimpleXML and DOM). I managed to get the value but found the keyword "CDATA" missing. What I got inside "content" tag was:
<script src="mraid.js"></script>
<div class="celtra-ad-v3">
<img src="data: image/png, celtra" style="display: none"onerror="(function(img){ varparams={ 'channelId': '45f3f23c','clickUrl': 'http%3a%2f%2fexamplehost.com%3a53766%2fCloudMobRTBWeb%2fClickThroughHandler.ashx%3fadid%3de6983c95-9292-4e16-967d-149e2e77dece%26cid%3d352%26crid%3d850'};varreq=document.createElement('script');req.id=params.scriptId='celtra-script-'+(window.celtraScriptIndex=(window.celtraScriptIndex||0)+1);params.clientTimestamp=newDate/1000;req.src=(window.location.protocol=='https: '?'https': 'http')+': //ads.celtra.com/e7f5ce18/mraid-ad.js?';for(varkinparams){req.src+='&'+encodeURIComponent(k)+'='+encodeURIComponent(params[ k ]); }img.parentNode.insertBefore(req, img.nextSibling);})(this);"/>
</div>
I know the parser was trying to sort of "beautify" the XML by removing CDATA. But what I want is just the raw data with "CDATA" tag in it. Is there any way to achieve this?
Appreciate your help.
And below is my 2 methods for your reference:
Method 1:
$type = simplexml_load_string($response['adm']) or die("Error: Cannot create object");
$data = $type->richmediaAd[0]->content;
Yii::warning((string) $data);
Yii::warning(strpos($data, 'CDATA'));
Method 2:
$doc = new \DOMDocument();
$doc->loadXML($response['adm']);
$richmediaAds = ($doc->getElementsByTagName("richmediaAd"));
foreach($richmediaAds as $richmediaAd){
$contents = $richmediaAd->getElementsByTagName("content");
foreach($contents as $content){
Yii::warning($content->nodeValue);
}
}

Answer 1

I'll improve this if I can, but you can target explicitly the "CDATA Section" node of your content element and use $doc->saveXML( $node ) with the node as the parameter to get that exact XML element structure.
$doc = new \DOMDocument();
$doc->loadXML( $xml );
$xpath = new \DOMXPath( $doc );
$nodes = $xpath->query( '/ad/richmediaAd/content');
foreach( $nodes[0]->childNodes as $node )
{
if( $node->nodeType === XML_CDATA_SECTION_NODE )
{
echo $doc->saveXML( $node ); // string content
}
}
Edit: You may wish to support some redundancy if there is no CDATA found.
Without XPATH
$doc = new \DOMDocument();
$doc->loadXML( $xml );
$doc->normalize();
foreach( $doc->getElementsByTagName('content')->item(0)->childNodes as $node )
{
if( $node->nodeType === XML_CDATA_SECTION_NODE )
{
echo $doc->saveXML( $node ); // string content
}
}