SimpleXMLElement
PHP Manual

SimpleXMLElement::xpath

(PHP 5 >= 5.2.0)

SimpleXMLElement::xpathRuns XPath query on XML data

说明

public array SimpleXMLElement::xpath ( string $path )

The xpath method searches the SimpleXML node for children matching the XPath path.

参数

path

An XPath path

返回值

Returns an array of SimpleXMLElement objects or FALSE in case of an error.

范例

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.


SimpleXMLElement
PHP Manual