<?php
$fp = fopen('results.json', 'w');
fwrite($fp, json_encode($response, JSON_UNESCAPED_UNICODE));
fclose($fp);
// or file_put_contents('results.json', json_encode($response, JSON_UNESCAPED_UNICODE))
<?php
$fp = fopen('results.json', 'w');
fwrite($fp, json_encode($response, JSON_UNESCAPED_UNICODE));
fclose($fp);
// or file_put_contents('results.json', json_encode($response, JSON_UNESCAPED_UNICODE))