php getElementsByTagName with specific attribute

Question

I think this gets the first element called <gallery>

$gallery = $objDOM->getElementsByTagName('gallery')->item(0);

I'm trying to get <gallery name="Third">

I think I need something equivalent to:

$gallery = $objDOM->getElementsByTagName('gallery[@name="Third"]')->item;

Thanks, Andy

Gordon · Accepted Answer · 2010-11-19 11:00:19Z

5

This is only possible with DOMXPath, e.g.

$xp    = new DOMXPath($yourDOMDocument);
$nodes = $xp->query('//gallery[@name="Third"]');

or by iterating over the node list after the call to getElementsByTagName with

foreach ($objDOM->getElementsByTagName('gallery') as $gallery) {
    if($gallery->getAttribute('name') === 'Third') {
         // do something
    }
}

answered Nov 19, 2010 at 11:00

Gordon

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2 Comments

KingCrunch Over a year ago

Using //gallery is different to getElementsByTagName() called on the Document, because it just matches the "gallery"-Elements on the root level, instead of every "gallery"-Element.

Gordon Over a year ago

@Sebastian not true. //gallery matches any gallery element anywhere in the document (or below a context node). This is equivalent to using getElementsByTagName()

KingCrunch · Accepted Answer · 2010-11-19 12:36:55Z

1

As the name suggests getElementsByTagName() only accepts tag names. Try XPath instead

$xpath = new DOMXPath ($objDOM);
$nodeList = $xpath->query('gallery[@name="Third"]');
$gallery = $nodeList->item(0);

Dont tested it, so there may be errors, typos or something.

edited Nov 19, 2010 at 12:36

answered Nov 19, 2010 at 11:00

KingCrunch

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1 Comment

Andy Over a year ago

Of course, don't know why I didn't do it like that in the first place! Cheers.

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