laravel5.4生成验证码的代码

use App\Http\Requests;
use App\Http\Controllers\Controller;

use Illuminate\Http\Request;

//引用对应的命名空间
use Gregwar\Captcha\CaptchaBuilder;
use Session;
class CodeController extends Controller{
  public function captcha($temp)
  {　　
    $builder = new CaptchaBuilder();
    $builder->build(150,32);
　　　　　　　//获取验证码内容
    $phrase = $builder->getPhrase();
    //把内容存入session
    Session::flash('milkcaptcha', $phrase); //存储验证码
    ob_clean(); //清除缓存
    return response($builder->output())->header('Content-type','image/jpeg'); //把验证码数据以jpeg图片的格式输出
  }

}

public function code($tmp)
{
//生成验证码图片的Builder对象，配置相应属性
$builder = new CaptchaBuilder;
//可以设置图片宽高及字体
$builder->build($width = 100, $height = 40, $font = null);
//获取验证码的内容
$phrase = $builder->getPhrase();
//把内容存入session
Session::flash('milkcaptcha', $phrase);
//生成图片
header("Cache-Control: no-cache, must-revalidate");//清除缓存
header('Content-Type: image/jpeg');
$builder->output();
}

header('Content-Type: image/jpeg');
$builder->output();

$builder->output();

$buildGer->output()->header('Content-type','image/jpeg')

header('Content-type','image/jpeg')

$buildGer->output())->header('Content-type','image/jpeg')

header('Content-Type: image/jpeg');$builder->output();