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(PHP 4)
xpath_new_context — Creates new xpath context
Creates a new xpath context.
WARNING FOR PHP5 USERS! (if you are having xpath problems)
There seem to be several versions of the DOM library/extension arround, it would appear that the one in this page is for PHP4 only, while this is the one in PHP5:
http://us2.php.net/manual/en/ref.dom.php
See the DOMXPath class for xpath functions.
Should that not be placed as:
DomDocument->xpath_new_context as it seems to be a method used from a DomDocument object.
Split easily XPath result into associative array:
function xpath_parser($xml_file, $xpath_query) {
$xml_file = realpath($xml_file);
if (file_exists($xml_file)) {
$doc = domxml_open_file($xml_file);
$ctx = $doc->xpath_new_context();
if ($xpathObj = @$ctx->xpath_eval($xpath_query)) {
$return = array();
foreach($xpathObj->nodeset as $risultato) {
$tagName = $risultato->tagname();
$content = $risultato->get_content();
if (array_key_exists($tagName, $return)) {
$return[$tagName][] = $content;
}else {
if (count($doc->get_elements_by_tagname($tagName)) > 1) {
$return[$tagName] = array($content);
}else {
$return[$tagName] = $content;
}
}
}
}else { return("<b>Error :</b> Wrong XPath query"); }
}else { return("<b>Errore :</b> File not exist or wrong filepath!"); }
return $return;
}
usage:
$xml_file = "./listaCD.xml";
$query = "/listacd/*";
echo "<pre>";
print_r(xpath_parser($xml_file, $query));
echo "</pre>";
I found a nice function in XML_sql2xml. With it, you can get, easily, the result of a xpath expression.
function getXpathValues(&$dom, $expr) {
$xpth = $dom->xpath_new_context();
$xnode = xpath_eval($xpth,$expr);
if (isset ($xnode->nodeset[0])) {
$firstnode = $xnode->nodeset[0];
$children = $firstnode->children();
$value = $children[0]->content;
return $value;
}
else return Null;
}
Usage :
$dom = domxml_open_file('pear.rss');
echo $this->getXpathValues($dom, "//channel/title");
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