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=====================================
MongoDB\\MapReduceResult::getCounts()
=====================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\MapReduceResult::getCounts()
Returns count statistics for the map-reduce operation.
.. code-block:: php
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.
.. code-block:: php
<?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::
array(4) {
["input"]=>
int(29353)
["emit"]=>
int(29353)
["reduce"]=>
int(180)
["output"]=>
int(51)
}
See Also
--------
- :phpmethod:`MongoDB\\Collection::mapReduce()`
- :manual:`mapReduce </reference/command/mapReduce>` command reference in the
MongoDB manual