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# Prefix Query
> More info about prefix query is in the [official elasticsearch docs][1]
Matches documents that have fields containing terms with a specified prefix.
## Simple example
```JSON
{
"prefix" : { "user" : "ki" }
}
```
In DSL:
```php
$prefixQuery = new PrefixQuery('user', 'ki');
$search = new Search();
$search->addQuery($prefixQuery);
$queryArray = $search->toArray();
```
[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-prefix-query.html
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