protected function FeedsXPathParserDOMXPath::executeQuery in Feeds XPath Parser 7

Same name and namespace in other branches

1. 6 FeedsXPathParserDOMXPath.inc \FeedsXPathParserDOMXPath::executeQuery()

Performs a XPath query.

Here we set libxml_use_internal_errors() to TRUE because depending on the libxml version, $xml->xpath() might return FALSE or an empty array() when a query doesn't match.

Parameters

string $query: The XPath query string.

DOMNode $context: (optional) A context object. Defaults to NULL.

Return value

mixed The result of the XPath query.

1 call to FeedsXPathParserDOMXPath::executeQuery()

FeedsXPathParserDOMXPath::namespacedQuery in ./FeedsXPathParserDOMXPath.inc

Executes an XPath query with namespace support.

File

./FeedsXPathParserDOMXPath.inc, line 202

Provides a custom version of DOMXPath for use with feeds_xpathparser.

Class

FeedsXPathParserDOMXPath

Wraps DOMXPath providing enhanced debugging and special namespace handling.

Code

protected function executeQuery($query, DOMNode $context = NULL) {
  $use_errors = libxml_use_internal_errors(TRUE);

  // Perfom XPath query.
  // So, grrr. FALSE is returned when there is an error. However, FALSE is
  // also a valid return value from DOMXPath::evaluate(). Ex: '1 = 2'
  if ($context) {
    $results = $this
      ->evaluate($query, $context);
  }
  else {
    $results = $this
      ->query($query);
  }
  $this->error = libxml_get_last_error();
  libxml_clear_errors();
  libxml_use_internal_errors($use_errors);
  return $results;
}