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reCAPTCHA 2.0 with PHP

June 1, 2021

HTML FORM

<form action="mail.php" method="post" enctype="multipart/form-data">

<input name="sender_name" placeholder="Your Name..."/>

<input name="sender_email" placeholder="Your email..."/>

<textarea placeholder="Your Message..." name="sender_message">

        <div class="captcha_wrapper">

<div class="g-recaptcha" data-sitekey="YOUR_KEY"></div>

</div>

<button type="submit" id="send_message">Send Message!</button>

</form>

PHP Server-Side Script

<?php

$sender_name = stripslashes($_POST["sender_name"]);

$sender_email = stripslashes($_POST["sender_email"]);

$sender_message = stripslashes($_POST["sender_message"]);

$response = $_POST["g-recaptcha-response"];

 

$url = 'https://www.google.com/recaptcha/api/siteverify';

$data = array(

'secret' => 'YOUR_SECRET',

'response' => $_POST["g-recaptcha-response"]

);

$options = array(

'http' => array (

'method' => 'POST',

'content' => http_build_query($data)

)

);

$context  = stream_context_create($options);

$verify = file_get_contents($url, false, $context);

$captcha_success=json_decode($verify);

 

if ($captcha_success->success==false) {

echo "<p>You are a bot! Go away!</p>";

} else if ($captcha_success->success==true) {

echo "<p>You are not not a bot!</p>";

}