Addressing Attributes

Examples thus far have dealt with element nodes in particular. XPath also supports the selection of attribute nodes.

// Returns the id attribute nodes of all ul nodes
$list = $xpath->query('//ul/@id');

// Returns all ul nodes that have id attribute nodes
$list = $xpath->query('//ul/@id/..');

// Returns all id attribute nodes
$list = $xpath->query('//@id');
?>

• //ul/@li addresses all id attribute nodes associated with ul element nodes that are descendants of the context node.
• Note how the use of relative addressing in the second example applies to attributes nodes just as it would apply to child element nodes.
• //@id addresses all id attribute nodes that are descendants of the context node regardless of the element with which they are associated.