How to build a simple and secure PHP verification code class and PHP verification code
This article introduces how to build a simple and secure PHP verification code class and PHP verification code, the content is very detailed, interested friends can refer to, hope to be helpful to you.
1. Sample CAPTCHA
Second, php authentication code class, secoder.class.php
2. Check whether the verification code is correct
3. CAPTCHA input box call page
Click the picture to get the CAPTCHA again
