How can the use of Google reCaptcha in PHP forms enhance security measures?

Using Google reCaptcha in PHP forms can enhance security measures by adding an additional layer of protection against automated bots and spam submissions. This helps to verify that the form is being submitted by a real person, reducing the risk of malicious attacks and unauthorized access. 

<?php
// Your reCaptcha site key
$siteKey = 'YOUR_SITE_KEY';

// Your reCaptcha secret key
$secretKey = 'YOUR_SECRET_KEY';

// Verify reCaptcha response
$response = $_POST['g-recaptcha-response'];
$remoteIp = $_SERVER['REMOTE_ADDR'];
$apiUrl = 'https://www.google.com/recaptcha/api/siteverify?secret=' . $secretKey . '&response=' . $response . '&remoteip=' . $remoteIp;
$response = file_get_contents($apiUrl);
$responseKeys = json_decode($response, true);

if(intval($responseKeys["success"]) !== 1) {
    // reCaptcha verification failed, handle accordingly
    die("reCaptcha verification failed.");
} else {
    // reCaptcha verification successful, process form submission
    // Your form processing code here
}
?>

Keywords

Google reCaptcha PHP forms security measures libraries validation spam prevention

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