Preface

CAPTCHA is the abbreviation of "Completely Automated Public Turing test to tell Computers and Humans Apart", It is a public, fully automatic program that distinguishes whether the user is a computer or a human.

Front-end code

  
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PHP code

appCdn = "https://cdn.kgcaptcha.com"; // 前端验证成功后颁发的 token，有效期为两分钟 $request->token = $_POST["kgCaptchaToken"]; // 当安全策略中的防控等级为3时必须填写 $request->userId = "kgCaptchaDemo"; // 请求超时时间，秒 $request->connectTimeout = 10; $requestResult = $request->sendRequest(); if ($requestResult->code === 0) { // 验签成功逻辑处理 echo "验证通过"; } else { // 验签失败逻辑处理 echo "验证失败，错误代码：{$requestResult->code}， 错误信息：{$requestResult->msg}"; }

Effect display

Related links

SDK open source address:github.com/KgCaptcha, by the way A demonstration:www.kgcaptcha.com/demo/

Recommended learning: "PHP Video Tutorial"

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