phpstorm本地执行artisan命令总是报错，在命令行进入homestead环境里执行是成功的。求解决？

php artisan报以下错误：

fangze:larabbs ye$ php artisan

   ErrorException 

  Use of undefined constant JSON_INVALID_UTF8_SUBSTITUTE - assumed 'JSON_INVALID_UTF8_SUBSTITUTE'

  at vendor/laravel/framework/src/Illuminate/Log/LogManager.php:416
    412|      * @return \Monolog\Formatter\FormatterInterface
    413|      */
    414|     protected function formatter()
    415|     {
  > 416|         return tap(new LineFormatter(null, $this->dateFormat, true, true), function ($formatter) {
    417|             $formatter->includeStacktraces();
    418|         });
    419|     }
    420| 

      +8 vendor frames 
  9   app/Exceptions/Handler.php:39
      Illuminate\Foundation\Exceptions\Handler::report(Object(Symfony\Component\ErrorHandler\Error\FatalError))

      +3 vendor frames 
  13  [internal]:0
      Illuminate\Foundation\Bootstrap\HandleExceptions::handleShutdown()

   Whoops\Exception\ErrorException 

  Declaration of Carbon\Translator::setLocale($locale) must be compatible with Symfony\Contracts\Translation\LocaleAwareInterface::setLocale(string $locale)

  at vendor/nesbot/carbon/src/Carbon/Translator.php:18
    14| use ReflectionException;
    15| use ReflectionFunction;
    16| use Symfony\Component\Translation;
    17| 
  > 18| class Translator extends Translation\Translator
    19| {
    20|     /**
    21|      * Translator singletons for each language.
    22|      *

      +1 vendor frames 
  2   [internal]:0
      Whoops\Run::handleShutdown()