Regexp Query

More info about regexp query is in the official elasticsearch docs

The regexp query allows you to use regular expression term queries.

Simple example

{
    "query": {
        "regexp":{
            "name.first" : "s.*y"
        }
    }
}

And now the query via DSL:

$regexpQuery = new RegexpQuery('name.first', 's.*y');

$search = new Search();
$search->addQuery($regexpQuery);

$queryArray = $search->toArray();