captcha recaptcha code example

Example 1: recaptcha

<script>
        grecaptcha.ready(function() {
          grecaptcha.execute('SITEKEY', {action: 'submit'}).then(function(token) {
              document.getElementById("token").value = token;
          });
        });
  </script>

Example 2: recaptcha

What is reCAPTCHA? reCAPTCHA protects your website from fraud and abuse. reCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on your website.

Example 3: recaptcha

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <script src="https://www.google.com/recaptcha/api.js?render=SITEKEY"></script>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form method="post" action="">
      <input type="hidden" name="token" id="token">
        <button type="submit" name="submit">Send</button>
    </form>
        <script>
        grecaptcha.ready(function() {
          grecaptcha.execute('SITEKEY', {action: 'submit'}).then(function(token) {
              document.getElementById("token").value = token;
          });
        });
  </script>
</body>
</html>
<?php 

  if(isset($_POST['submit'])){
    $request = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=SECRETKEY&response=" . $_POST['token']);
    $request = json_decode($request);
    if($request->success == true){
      if($request->score >= 0.6){
        // Do something
      }else{
        echo "error";
      }
    }
  }
?>

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