• Reference >
• Result Classes >
• MongoDB\MapReduceResult::getCounts()

MongoDB\MapReduceResult::getCounts()

Definition

MongoDB\MapReduceResult::getCounts

Returns count statistics for the map-reduce operation.

copy

function getCounts(): array

Return Values

An array of count statistics for the map-reduce operation.

Examples

This example reports the count statistics for a map-reduce operation.

copy

<?php

$collection = (new MongoDB\Client)->test->zips;

$map = new MongoDB\BSON\Javascript('function() { emit(this.state, this.pop); }');
$reduce = new MongoDB\BSON\Javascript('function(key, values) { return Array.sum(values) }');
$out = ['inline' => 1];

$result = $collection->mapReduce($map, $reduce, $out);

var_dump($result->getCounts());

The output would then resemble:

copy

array(4) {
  ["input"]=>
  int(29353)
  ["emit"]=>
  int(29353)
  ["reduce"]=>
  int(180)
  ["output"]=>
  int(51)
}

See Also

• MongoDB\Collection::mapReduce()
• mapReduce command reference in the MongoDB manual

←   MongoDB\ChangeStream::valid() MongoDB\MapReduceResult::getExecutionTimeMS()  →

© MongoDB, Inc 2008-present. MongoDB, Mongo, and the leaf logo are registered trademarks of MongoDB, Inc.