dedecms调用验证码

<?php
// 引入验证码插件文件
require_once(DEDEINC.'/inc/gt3lib/GT3.class.php');

// 创建验证码对象
$GtSdk = new \GeetestLib(GT3_ID, GT3_KEY);

// 生成验证码
$status = $GtSdk->pre_process();
if ($status == 1) {
    echo '<div class="gt_holder gt_ajax" id="gt_holder"></div>';
    echo '<script src="https://static.geetest.com/static/tools/gt.js"></script>';
    echo '<script>var handler = function (captchaObj) { captchaObj.appendTo("#gt_holder"); captchaObj.onSuccess(function () { var result = captchaObj.getValidate(); // 验证成功后的回调函数 }); captchaObj.onError(function () { alert("验证失败，请重新验证！"); }); }; window.initGeetest({ gt: "' . GT3_ID . '", challenge: "' . $GtSdk->getChallenge() . '", offline: !"' . $GtSdk->isOffline() . '" }, handler);</script>';
}
?>