DOMXPath::evaluate
(No version information available, might be only in CVS)
DOMXPath::evaluate —
Evaluates the given XPath expression and returns a typed result if possible.
Description
mixed DOMXPath::evaluate
(
string $expression
[,
DOMNode $contextnode
] )
Parameters
-
expression
-
The XPath expression to execute.
-
contextnode
-
The optional contextnode
can be specified for
doing relative XPath queries. By default, the queries are relative to
the root element.
Return Values
Returns a typed result if possible or a DOMNodeList
containing all nodes matching the given XPath expression
.
Examples
Example #1 Getting the count of all the english books
<?php
$doc = new DOMDocument;
$doc->load('book.xml');
$xpath = new DOMXPath($doc);
$tbody = $doc->getElementsByTagName('tbody')->item(0);
$query = 'count(row/entry[. = "en"])';
$entries = $xpath->evaluate($query, $tbody);
echo "There are $entries english books\n";
?>
The above example will output:
There are 2 english books
DOMXPath::__construct
