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# Percentile Ranks Aggregation
> More info about percentile ranks aggregation is in the [official elasticsearch docs][1]
A multi-value metrics aggregation that calculates one or more percentile
ranks over numeric values extracted from the aggregated documents.
## Simple example
```JSON
{
"aggregations" : {
"load_time_outlier" : {
"percentile_ranks" : {
"field" : "load_time",
"values" : [15, 30]
}
}
}
}
```
And now the query via DSL:
```php
$percentileRanksAggregation = new PercentileRanksAggregation('load_time_outlier', 'load_time', [15, 30]);
$search = new Search();
$search->addAggregation($percentileRanksAggregation);
$queryArray = $search->toArray();
```
[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-percentile-rank-aggregation.html
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