(PHP 5 >= 5.2.0)
SimpleXMLElement::xpath — Runs XPath query on XML data
$path
)
The xpath method searches the SimpleXML node for
children matching the XPath path.
path
An XPath path
Returns an array of SimpleXMLElement objects or FALSE in
case of an error.
Example #1 Xpath
<?php
$string = <<<XML
<a>
<b>
<c>text</c>
<c>stuff</c>
</b>
<d>
<c>code</c>
</d>
</a>
XML;
$xml = new SimpleXMLElement($string);
/* Search for <a><b><c> */
$result = $xml->xpath('/a/b/c');
while(list( , $node) = each($result)) {
echo '/a/b/c: ',$node,"\n";
}
/* Relative paths also work... */
$result = $xml->xpath('b/c');
while(list( , $node) = each($result)) {
echo 'b/c: ',$node,"\n";
}
?>
以上例程会输出：
/a/b/c: text /a/b/c: stuff b/c: text b/c: stuff
Notice that the two results are equal.