wxxcx_learn Exception Handling

It belongs to the basic framework, sub-level

Catch the exception, handle exceptions (logging, repair abnormal, returned to the client error), throw an exception

Global exception handler (AOP) for the same formatting error

try
{
    $banner = BannerModel::getBannerByID($id);
}
catch (Exception $ex)
{
    $err = [
        'error_code' => '10001',
        'msg' => $ex->getMessage()
    ];
    return json($err);
}