How can PHP beginners ensure that the reCAPTCHA verification is correctly implemented in their code?

To ensure that reCAPTCHA verification is correctly implemented in PHP code, beginners should follow the official reCAPTCHA documentation carefully and make sure to include the necessary HTML markup and backend verification steps. They should also ensure that the reCAPTCHA keys are correctly set up in their code to communicate with the reCAPTCHA service.

<?php
// Verify reCAPTCHA response
$recaptcha_secret = 'YOUR_RECAPTCHA_SECRET_KEY';
$recaptcha_response = $_POST['g-recaptcha-response'];

$response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=$recaptcha_secret&response=$recaptcha_response");
$responseKeys = json_decode($response, true);

if(intval($responseKeys["success"]) !== 1) {
    // reCAPTCHA verification failed
    // Handle the error accordingly
} else {
    // reCAPTCHA verification successful
    // Proceed with your code logic
}
?>