When I run in terminal php artisan migrate this results in 'Nothing to migrate' when indeed there is nothing to migrate.
当我在代码中使用Artisan::call('migrate')时(在自定义Artisan命令中使用它)，这不会返回任何消息.它只是执行代码，没有任何反馈.
如果我把Artisan::call方法的结果设为vardump()，它只会返回int(0)
Is it possible to get the response of the Artisan call method?
所有命令的返回结果在类Symfony\Component\Console\Command\Command、方法run中定义:
return is_numeric($statusCode) ? (int) $statusCode : 0;
The $statusCode variable is set by calling the command's execute method, which in artisan's case is defined in the class Illuminate\Console\Command:
protected function execute(InputInterface $input, OutputInterface $output)
{
return $this->fire();
}
The result of the fire method is left up to the individual commands, in the case of php artisan migrate command, nothing is returned from the method so the $statusCode is null (which is why you get the 0 returned from Symfony\Component\Console\Command\Command::run method)
如果想从自定义命令返回响应，只需从fire方法返回一个整数，它就会跳回$statusCode.您可以使用它以编程方式根据自定义命令的不同结果进行切换.
If you specifically want to get the result from the artisan:migrate command, then I don't think there's much you can do to change the return value besides wrapping the command in your own custom command that calls it.