'PATH_INFO'По какому URL обращаетесь и что ожидаете увидеть в результате?
Contains any client-provided pathname information trailing the actual script filename but preceding the query string, if available. For instance, if the current script was accessed via the URI www.example.com/php/path_info.php/some/stuff?foo=bar, then $_SERVER['PATH_INFO'] would contain /some/stuff.
return jsonify({'audio_wav_path': audio_wav_path})$resp = json_decode($resp);
$audio = base64_decode(($resp)->results[0]->audio);ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);