MongoDBMapReduceResult-getCounts.txt

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MongoDB\\MapReduceResult::getCounts()
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.. default-domain:: mongodb

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Definition
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.. 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