Shulou(Shulou.com)06/03 Report--

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

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