chienowa/recaptcha.html

## recaptcha.html
<html>
<head>
<script src='https://www.google.com/recaptcha/api.js?render={SITE_KEY}'></script>
</head>
<body>
<p> recaptcha form test</p>
<form id="form" method="post" action="send.php">
<input name="test01" type="text"><br>
<input name="test02" type="text"><br>
<input name="test02" type="text">
<input id="token" name="g-recaptcha-token" type="hidden" value="">
<input id="send" type="button" value="test recaptcha3">
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(function(){
  $("#send").on("click",function(){
    grecaptcha.ready(function() {
      grecaptcha.execute('{SITE_KEY}', {action: 'homepage'}).then(function(token) {
        if(token.length > 0) {
          $("#token").val(token);
          $("#form").submit();
        } else {
          return false;
        }
      });
    }); //end of grecaptcha
  }); //end of submit
});
</script>
</body>
</html>

## send.php
<?php

define('CAPTCHA_SECRET',"{SECRET_KEY}");s
$post_data = http_build_query(
    array(
        'secret' => CAPTCHA_SECRET,
        'response' => $_POST['g-recaptcha-token'],
        'remoteip' => $_SERVER['REMOTE_ADDR']
    )
);
$opts = array('http' =>
    array(
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => $post_data
    )
);
$context  = stream_context_create($opts);
$response = file_get_contents('https://www.google.com/recaptcha/api/siteverify', false, $context);
$result = json_decode($response);
echo "<pre>";
var_dump($result);
echo "</pre>";
if (!$result->success) {
    throw new Exception('Verification failed!', 1);
} else {
    // EXAMPLE
    if($result->score > 0.7) echo "You're probably a human being!";
    else if($result->score > 0.3) echo "You're may a human being!";
    else echo "You must be a BOT!";
}
	<html>
	<head>
	<script src='https://www.google.com/recaptcha/api.js?render={SITE_KEY}'></script>
	</head>
	<body>
	<p> recaptcha form test</p>
	<form id="form" method="post" action="send.php">
	<input name="test01" type="text"><br>
	<input name="test02" type="text"><br>
	<input name="test02" type="text">
	<input id="token" name="g-recaptcha-token" type="hidden" value="">
	<input id="send" type="button" value="test recaptcha3">
	</form>
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
	<script>
	$(function(){
	$("#send").on("click",function(){
	grecaptcha.ready(function() {
	grecaptcha.execute('{SITE_KEY}', {action: 'homepage'}).then(function(token) {
	if(token.length > 0) {
	$("#token").val(token);
	$("#form").submit();
	} else {
	return false;
	}
	});
	}); //end of grecaptcha
	}); //end of submit
	});
	</script>
	</body>
	</html>
	<?php

	define('CAPTCHA_SECRET',"{SECRET_KEY}");s
	$post_data = http_build_query(
	array(
	'secret' => CAPTCHA_SECRET,
	'response' => $_POST['g-recaptcha-token'],
	'remoteip' => $_SERVER['REMOTE_ADDR']
	)
	);
	$opts = array('http' =>
	array(
	'method' => 'POST',
	'header' => 'Content-type: application/x-www-form-urlencoded',
	'content' => $post_data
	)
	);
	$context = stream_context_create($opts);
	$response = file_get_contents('https://www.google.com/recaptcha/api/siteverify', false, $context);
	$result = json_decode($response);
	echo "<pre>";
	var_dump($result);
	echo "</pre>";
	if (!$result->success) {
	throw new Exception('Verification failed!', 1);
	} else {
	// EXAMPLE
	if($result->score > 0.7) echo "You're probably a human being!";
	else if($result->score > 0.3) echo "You're may a human being!";
	else echo "You must be a BOT!";
	}