mews/captcha 验证码组件

   /**
    * 图像验证码
    */
   public function captcha(CaptchaBridge $captcha, $type = 'default')
   {
      $api_captcha = $captcha->newInstance(ApiSessionStore::getSession());

      $response = $api_captcha->create($type, true);
        return $this->success($response);

　　}

/**
 * 图像验证
 */
public function captchaCheck(Request $request, CaptchaBridge $captcha, $type = 'default', $forget = false)
{
       //调用captcha_api_check方法。
       $captcha = $request->input('captcha'); //验证码
       $key = $request->input('key'); //key

       if (!captcha_api_check($captcha , $key)){
           return $this->failed('验证码错误');
       }else{
           return $this->success('验证通过');
       }

　}