print "Querying for dc:titles:\n";
$results = librdf_model_query_execute($model, $query);
$count = 1;
while ($results && !librdf_query_results_finished($results)) {
print "result {$count}: {\n";
for ($i = 0; $i < librdf_query_results_get_bindings_count($results); $i++) {
$val = librdf_query_results_get_binding_value($results, $i);
if ($val) {
$nval = librdf_node_to_string($val);
} else {
$nval = '(unbound)';
}
print " " . librdf_query_results_get_binding_name($results, $i) . "=" . $nval . "\n";
}
print "}\n";
librdf_query_results_next($results);
$count++;
}
if ($results) {
print "Returned {$count} results\n";
}
$results = null;
print "\nExecuting query again\n";
$results = librdf_model_query_execute($model, $query);
if ($results) {
$str = librdf_query_results_to_string($results, null, null);
print "Query results serialized to an XML string size " . strlen($str) . " bytes\n";
} else {
print "Query results couldn't be serialized to an XML string\n";
}
$serializer = librdf_new_serializer($world, 'rdfxml', null, null);
/**
* Advance the iterator.
*
* @return void
* @access public
*/
public function next()
{
if ($this->isvalid) {
$this->rewindable = false;
$ret = librdf_query_results_next($this->query_results);
if ($ret) {
$this->isvalid = false;
} else {
$this->key++;
}
}
}