Why can't elasticsearch-phplaravel return highlighted data?

{Code...} returns all query results, that is, no highlight data. please help me !!!

Namespace App \ Http \ Controllers \ Search; use Illuminate \ Http \ Request; use App \ Http \ Requests; use App \ Http \ Controllers \ Controller; use Elasticsearch \ Client; class Index extends Controller {protected $ client; public function _ construct (Client $ client) {$ this-> client = $ client;} public function search_test (Request $ request, $ filter = 'list') {$ word = trim ($ request-> input ('word'); $ s = is_null ($ request-> in Put ('s '))? 10: trim ($ request-> input ('s '); // how many records per page $ f = is_null ($ request-> input ('F '))? 1: trim ($ request-> input ('F'); // Current page $ fr = ($ F-1) * $ s; // the current page starts from the first record $ params = ['index' =>'s _ INDEX', 'type' =>'s _ type ', 'Body' => ['query' => ['Bool '=> ['shot' => [['match' => ['title' => $ word], ['match' => ['description' => $ word],], 'from' => $ fr, 'size' => $ s, 'highlight' => ['fields' => ['title' => []; $ response = $ this-> client-> search ($ params ); echo"
";        var_dump($response);        echo "
";}}

All query results can be returned, that is, there is no highlight data. please help !!!

Reply content:

Namespace App \ Http \ Controllers \ Search; use Illuminate \ Http \ Request; use App \ Http \ Requests; use App \ Http \ Controllers \ Controller; use Elasticsearch \ Client; class Index extends Controller {protected $ client; public function _ construct (Client $ client) {$ this-> client = $ client;} public function search_test (Request $ request, $ filter = 'list') {$ word = trim ($ request-> input ('word'); $ s = is_null ($ request-> in Put ('s '))? 10: trim ($ request-> input ('s '); // how many records per page $ f = is_null ($ request-> input ('F '))? 1: trim ($ request-> input ('F'); // Current page $ fr = ($ F-1) * $ s; // the current page starts from the first record $ params = ['index' =>'s _ INDEX', 'type' =>'s _ type ', 'Body' => ['query' => ['Bool '=> ['shot' => [['match' => ['title' => $ word], ['match' => ['description' => $ word],], 'from' => $ fr, 'size' => $ s, 'highlight' => ['fields' => ['title' => []; $ response = $ this-> client-> search ($ params ); echo"
";        var_dump($response);        echo "
";}}

All query results can be returned, that is, there is no highlight data. please help !!!

I haven't done any search service yet. I feel like the highlighted data should be processed in the controller.