CODEWITHSUNDEEP
phpxmldomdocument
bln_dev
bln_dev

Reputation: 2411

Line breaks produce Text nodes in DOMDocument - how should I handle this

I'm using php's DOMDocument library and read an XML string with loadXML. I am then iterating over the childs of a node tagged "Info" with this code:

$doc = new \DOMDocument();
$doc->loadXML(
'<?xml version="1.0" encoding="UTF-8"?>
<GAEB xmlns="http://www.gaeb.de/GAEB_DA_XML/DA31/3.2">
 <Info>
  <Version>3.2</Version>
  <VersDate>2013-10</VersDate>
  <Date>2014-10-10</Date>
  <Time>12:28:28</Time>
  <ProgSystem>GAEB Zertifizierung</ProgSystem>
  <ProgName>BVBS</ProgName>
 </Info>
</GAEB>'
);

$Info = $doc->getElementsByTagName("Info");

foreach ($Info as $element) {
    echo "[". $element->nodeName. "]";
    $nodes = $element->childNodes;
    foreach ($nodes as $node) {
        echo "[" . $node->nodeName . "]";
        echo  $node->nodeValue;
    }
}

This node has 6 childs, however the iteration has 13 runs. That's because there is whitespace characters that interpreted as Text nodes. If I look at each nodes $node->nodeType it shows 1 for the 6 real childs and 3 for the 7 childs which contents are \n. The question is now, how am I supposed to deal with it? Is it ok that the DOMDocument contains those text nodes and I should "continue" over them with something like if($node->nodeType===3) continue or would I try to delete those whitespaces earlier when loading the xml. Just removing the \n from the input xml doesn't work because then spaces between the nodes (e.g. > <) are interpreted as Text nodes.

sample file

<?xml version="1.0" encoding="UTF-8"?>
<GAEB xmlns="http://www.gaeb.de/GAEB_DA_XML/DA31/3.2">
 <Info>
  <Version>3.2</Version>
  <VersDate>2013-10</VersDate>
  <Date>2014-10-10</Date>
  <Time>12:28:28</Time>
  <ProgSystem>GAEB Zertifizierung</ProgSystem>
  <ProgName>BVBS</ProgName>
 </Info>
</GAEB>

Upvotes: 3

Views: 380

Answers (1)

Ruslan Osmanov
Ruslan Osmanov

Reputation: 21492

Blank nodes can be ignored with the LIBXML_NOBLANKS option as follows:

$doc->loadXML($xml, LIBXML_NOBLANKS);

Upvotes: 3

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