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MongoDB\MapReduceResult::getCounts()

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  • Definition
  • Return Values
  • Examples
  • See Also
MongoDB\MapReduceResult::getCounts()

Returns count statistics for the map-reduce operation.

function getCounts(): array

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

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

<?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)
}
  • MongoDB\Collection::mapReduce()

  • mapReduce command reference in the MongoDB manual

← MongoDB\MapReduceResult Class