Използване на новата рамка за агрегиране на MongoDB:
$result = $db->command(array(
'aggregate' => 'COLLECTION_NAME',
'pipeline' => array(
// Match:
// We can skip this in case that we don't need to filter
// documents in order to perform the aggregation
array('$match' => array(
// Criteria to match against
)),
// Group:
array('$group' => array(
// Groupby fields:
'_id' => "$fieldname1, $fieldname2, $or_empty, $etc",
// Count:
'count' => array('$sum' => 1),
// Sum:
'type_sum' => array('$sum' => '$type'),
))
// Other aggregations may go here as it's really a PIPE :p
),
));