protected function FrxData::simplexml_evaluate in Forena Reports 7.4

Same name and namespace in other branches

1. 7.3 FrxData.inc \FrxData::simplexml_evaluate()

Provides an api to the {=xpath} syntax that can be used to evaluat expressions such as sum and count in a report. We need to use the DOM object here, because this method isn't exposed with simplexml.

Parameters

$xml:

$path:

Return value

unknown_type

1 call to FrxData::simplexml_evaluate()

FrxData::getValue in ./FrxData.inc

Get the value from the data. This is used by token_replace method to extract the data based on the path provided.

File

./FrxData.inc, line 98

Class

FrxData

Code

protected function simplexml_evaluate($xml, $path) {
  if (!method_exists($xml, 'xpath')) {
    return '';
  }
  $dom_node = dom_import_simplexml($xml);
  $dom_doc = new DOMDocument('');
  $dom_node = $dom_doc
    ->importNode($dom_node, TRUE);
  $dom_doc
    ->appendChild($dom_node);

  // Do we also need to call AppendChild?
  $xpath = new DOMXpath($dom_doc);
  $ret = $xpath
    ->evaluate($path, $dom_node);
  return $ret;
}