[安装扩展](think-captcha%E6%89%A9%E5%B1%95%E7%AE%80%E4%BB%8B.md) [验证码显示](%E9%AA%8C%E8%AF%81%E7%A0%81%E6%98%BE%E7%A4%BA.md) [更换验证码](%E7%82%B9%E5%87%BB%E9%AA%8C%E8%AF%81%E7%A0%81%E5%9B%BE%E7%89%87%E6%9B%B4%E6%8D%A2%E9%AA%8C%E8%AF%81%E7%A0%81.md) [验证码校验](%E9%AA%8C%E8%AF%81%E7%A0%81%E6%A0%A1%E9%AA%8C.md) [验证码配置](%E9%AA%8C%E8%AF%81%E7%A0%81%E9%85%8D%E7%BD%AE.md) [自定义验证码](%E8%87%AA%E5%AE%9A%E4%B9%89%E9%AA%8C%E8%AF%81%E7%A0%81.md)