PHP Recaptcha PHP tutorial

mail.php

<?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>";
	}

$response is never used. I would recommend using it in line 10, or deleting line 5.

ok half the code is missing... ???

Thanks for the tutorial! I was messing with recaptcha but don't know what or how to utilise it, now I understand. Thank you.