Using multiple types or indexes in Elasticsearch php API

I want to query multiple types and indices using Elasticsearch PHP API. but
I don't Know how. should I pass an array of types and indices to $params ? :

$params['index'] = $index;//array of indices
$params['type'] = $types;//array of types
$params['body'] = $q;//query body
//request elasticsearch for matched documents
$results = $client->search($params);

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