How to get value from attribute element

Question

How To Get Value type = 'Microsoft Lumia'. This is output:

<phone>
<model type="Microsoft Lumia">
<lumia id="Lumia 650">
<displaySize>4 Inch</displaySize>
<platformOS>Windows</platformOS>
</lumia>
<lumia id="Lumia 890">
<displaySize>5 Inch</displaySize>
<platformOS>Windows</platformOS>
</lumia>

this is my syntax:

$roottag = $dom->getElementsByTagName("model")[0].getAttribute("type[contain='Microsoft Lumia']");

can somebody help me ! thanks in advance

Answer 1

You haven't tagged the question with a programming language, but your code looks very much like PHP using the DOM extension:

$roottag = $dom->getElementsByTagName("model")[0].getAttribute("type[contain='Microsoft Lumia']");

If I understand you correctly, the problem is that you don't know how to fetch a model element having type attribute with a value containing 'Microsoft Lumia' string. This is easily done with the following XPath expression:

//model[contains(@type, 'Microsoft Lumia')]

The double slash selects all model elements in the document. The condition in square brackets filters out the result set by the test calling contains function. The function checks if the type attribute value contains the given keyword.

Fortunately, the DOM extension supports XPath through its DOMXPath class. If your code is not PHP, you still can figure out the solution in your language. The general idea is to use XPath as shown above.

Example in PHP

The following example prints the type attribute values containing Lumia keyword.

$xml = <<<'XML'
<phone>
  <model type="Microsoft Lumia">
    <lumia id="Lumia 650">
      <displaySize>4 Inch</displaySize>
      <platformOS>Windows</platformOS>
    </lumia>
    <lumia id="Lumia 890">
      <displaySize>5 Inch</displaySize>
      <platformOS>Windows</platformOS>
    </lumia>
  </model>
  <model type="MS Lumia">
    <lumia id="X">
      <displaySize>5 Inch</displaySize>
      <platformOS>Windows</platformOS>
    </lumia>
  </model>
</phone>
XML;
$doc = new DOMDocument;
$doc->loadXML($xml);

$xpath = new DOMXPath($doc);
// See https://www.w3.org/TR/xpath/#function-contains
$keyword = 'Lumia';
$models = $xpath->query("//model[contains(@type, '{$keyword}')]");
foreach ($models as $m) {
  printf(
    "«%s» contains «%s»\n",
    $m->getAttribute('type'),
    $keyword
  );
}

Output

«Microsoft Lumia» contains «Lumia»
«MS Lumia» contains «Lumia»

Answer 2

you can get 'Microsoft Lumia' :

alert(document.getElementsByTagName("model")[0].getAttribute("type"));

updated part: as your request in comment:

var d = document.getElementsByTagName("model")[0].getAttribute("type");
  if(d == 'Microsoft Lumia'){
  alert(d);
 }