三维PHP验证码 3DCaptcha

     <p><a name="About">3DCaptcha 是一个易用的 PHP 验证码库，主要特性：</a></p>    <ul>     <li>一个种新的验证码试，采用3D来显示验证码。</li>     <li>It uses a markov-chain to generate words that resemble human language and are easy to type. </li>     <li>易于部署 </li>    </ul>    <p></p>    <p><img alt="三维PHP验证码 3DCaptcha" src="https://simg.open-open.com/show/4780bffe3431abb33e121671de310fe2.jpg" width="256" height="144" /><br /> <br /> </p>    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1324535248280" target="_blank">http://www.open-open.com/lib/view/home/1324535248280</a></p>