思路：寫個(gè)middleware把返回值遞歸轉(zhuǎn)一下

class ResponseTransFormMiddleware
{
    //下劃線轉(zhuǎn)駝峰
    public function handle($request, Closure $next)
    {
        $response = $next($request);
        return $this->changeHump(json_decode($response->original,true));
    }


    //轉(zhuǎn)換駝峰(只轉(zhuǎn)key)
    public function changeHump($params)
    {
        if (is_array($params)) {
            foreach ($params as $key=>$value){
                unset($params[$key]);
                $params[$this->convertUnderline($key)] = is_array($value)?$this->changeHump($value):$value;
            }
        }
        return $params;
    }

    public function convertUnderline($str)
    {
        return  preg_replace_callback('/([-_]+([a-z]{1}))/i', function ($matches) {return strtoupper($matches[2]);}, $str);
    }
}

middleware注冊(cè)

$app->routeMiddleware(['responseTransForm' => App\Http\Middleware\ResponseTransFormMiddleware::class,]); //下劃線轉(zhuǎn)駝峰

所有的api加一個(gè)前綴

$router->group(['prefix' => 'api','middleware'=>'responseTransForm'], function () use ($router) {...});