Always getting the Invalid Input Response error message.

[jackjpdiscos]

Trying to update my plugin code so it handles Google ReCAPTCHA V3 however I am getting the error message Invalid Input Response when I use V3 Keys, even after updating the code.

I tried

$site_key = '(actual site key)'

and also

$site_key = mdjm_get_option ('dcf_recaptcha_site_key')

The 'dcf_recaptcha_site_key' is a user input based on their own site key.

Same applies for the secret key too (dcf_recaptcha_secret). Full code is this:

/**
 * Display a form recaptcha field
 *
 * @since   2.0
 * @return  str         reCaptcha Field
 */
function mdjm_dcf_display_recaptcha_field() {
    global $dcf_form;

    $site_key = '6LeiLvgkAAAAAF-oKFQAq-p4AVQLNkYmK9UAmncz';

    if ( ! $dcf_form->settings['recaptcha'] || ! $site_key ) {
        return;
    }

    wp_enqueue_script( 'google-recaptcha', 'https://www.google.com/recaptcha/api.js?render='.$site_key );
    wp_enqueue_script( 'google-recaptcha' );

    echo sprintf('<input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response" value="" />');

} // mdjm_dcf_display_recaptcha_field
add_action( 'mdjm_dcf_form_after_fields', 'mdjm_dcf_display_recaptcha_field', 10, 2 );

/**
 * Validate reCaptcha.
 *
 * @since   2.0
 * @param   str $response   reCaptcha response.
 * @return  bool    True if verified, otherwise false
 */
function mdjm_dcf_validate_recaptcha( $response ) {
    $secret_key = '6LeiLvgkAAAAAOoxEjyX3ikK48znwGkwAXYKnBVE';
    $remoteip = $_SERVER['REMOTE_ADDR'];
    $url = 'https://www.google.com/recaptcha/api/siteverify';
    $data = array(
        'secret'   => $secret_key,
        'response' => $response,
        'remoteip' => $remoteip,
    );
    $options = array(
        'http' => array(
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
            'method'  => 'POST',
            'content' => http_build_query( $data ),
        ),
    );

    $context  = stream_context_create( $options );
    $result = file_get_contents( $url, false, $context );
    $result = json_decode( $result );

    if ( ! $result->success || $result->score < 0.5 ) {
        MDJM()->debug->log_it( 'Google reCaptcha Error: ' . var_export( $result->{'error-codes'}, true ) );
        return false;
    }

    return true;
} // mdjm_dcf_validate_recaptcha

/**
 * Process contact form submissions.
 *
 * @since   2.0
 * @return  void
 */
function mdjm_dcf_process_contact_form_submission() {
    if ( ! isset( $_POST['mdjm_dcf_nonce'] ) || ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['mdjm_dcf_nonce'] ) ), 'mdjm-dcf-form-submit' ) ) {
        wp_die( esc_html_e( 'Security failed.', 'mdjm-dynamic-contact-forms' ) );
    }

    // Verify ReCAPTCHA V3
    $secret_key = mdjm_get_option( 'dcf_recaptcha_secret' );
    $response = $_POST['g-recaptcha-response'];
    $remoteip = $_SERVER['REMOTE_ADDR'];
    $url = 'https://www.google.com/recaptcha/api/siteverify';
    $data = array(
        'secret'   => $secret_key,

        'response' => $response,
        'remoteip' => $remoteip,
        'action'   => 'submit_form'
    );
    $options = array(
        'http' => array(
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
            'method'  => 'POST',
            'content' => http_build_query( $data ),
        ),
    );

    $context  = stream_context_create( $options );
    $result = file_get_contents( $url, false, $context );
    $result = json_decode( $result );

    if ( ! $result->success || $result->score < 0.5 ) {
        wp_die( esc_html_e( 'Invalid reCAPTCHA.', 'mdjm-dynamic-contact-forms' ) );
    }

    mdjm_do_honeypot_check( $_POST );

    $form_id  = ! empty( $_POST['dcf_form_id'] ) ? $_POST['dcf_form_id'] : '';
    $redirect = ! empty( $_POST['redirect'] ) ? $_POST['redirect']  : false;

    $posted = array();
    $ignore = mdjm_dcf_ignore_fields();

    foreach ( $_POST as $key => $value ) {
        if ( ! in_array( $key, $ignore ) ) {
            $posted[ $key ] = $value;
        }
    }

    if ( mdjm_dcf_add_event_from_form( $form_id, $posted ) ) {
        $dcf_form = new MDJM_Contact_Form( $form_id );

        if ( ! $dcf_form->settings['redirect'] ) {
            $url = add_query_arg( 'mdjm_message', 'form_submitted', $redirect );
        } else {
            $url = get_permalink( $dcf_form->settings['redirect'] );
        }
    } else {
        $url = add_query_arg( 'mdjm_message', 'submit_fail', $redirect );
    }

    wp_safe_redirect( $url );
    die();
} // mdjm_dcf_process_contact_form_submission
add_action( 'mdjm_submit_contact_form', 'mdjm_dcf_process_contact_form_submission' );