he reCAPTCHA PHP Library provides a simple way to place a CAPTCHA on your PHP website, helping you stop bots from abusing it. The library wraps the reCAPTCHA API. To use reCAPTCHA with PHP, you can download reCAPTCHA PHP library. You will only need o

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java web 实现的登录页面，带验证码的，Servlet架构-Implementation of Java Web login page, reCAPTCHA, Servlet architecture