验证码获取

    /**
     * 验证码获取
     */
     use think\Verify;
    public function verify()
    {
        //验证码类型
        $type   = I('get.type') ? I('get.type') : 'user_login';
        $config = array(
            'fontSize' => 30,
            'length'   => 4,
            'imageH'   => 60,
            'imageW'   => 300,
            'fontttf'  => '5.ttf',
            'useCurve' => false,
            'useNoise' => false,
            'codeSet'  => '2345678',
        );
        $Verify = new Verify($config);
        $Verify->entry($type);
        exit();
    }