Load just XPath search to XMLReader memory?

Question

Can i somehow do this? XMLReader is pull parser, so i expect from him to give me just data i search, but it loads whole document into memory and then gives me search from his me

Answer 1

You are still searching the entire OddsList. Try using the XMLReader something like this:

$reader = new XMLReader();
$reader->open($url);
$dom = new DomDocument();

// Find first occurrence of Odds
while ($reader->read() && $reader->name !== 'Odds');

// Iterate Odds
while ($reader->name === 'Odds'){
    $odds = simplexml_import_dom($dom->importNode($reader->expand(), true));

    // Process those having the correct Bookmaker child value
    if ($odds->xpath('./Bookmaker[string()="Interwetten"]')) {
        var_dump($odds);
    }

    // Move to the next one
    $reader->next('Odds');
}

Output:

object(SimpleXMLElement)#4 (6) {
  ["FixtureMatch_Id"]=>
  string(6) "346076"
  ["Bookmaker"]=>
  string(11) "Interwetten"
  ["UpdatedDate"]=>
  string(23) "2015-06-20T19:42:33.113"
  ["Type"]=>
  string(14) "Over/Under 2.5"
  ["HomeOdds"]=>
  string(4) "1.85"
  ["AwayOdds"]=>
  string(4) "1.75"
}
object(SimpleXMLElement)#4 (7) {
  ["FixtureMatch_Id"]=>
  string(6) "346076"
  ["Bookmaker"]=>
  string(11) "Interwetten"
  ["UpdatedDate"]=>
  string(23) "2015-06-20T19:42:31.397"
  ["Type"]=>
  string(3) "1X2"
  ["HomeOdds"]=>
  string(3) "1.8"
  ["DrawOdds"]=>
  string(3) "3.4"
  ["AwayOdds"]=>
  string(1) "4"
}