[Defender Pro] reCaptcha compatibility with Profile Builder/Profile Builder Pro login form

defender-pb-login-recaptcha.php

<?php
/**
 * Plugin Name: [Defender Pro] reCaptcha compatibility with Profile Builder/Profile Builder Pro login form
 * Description: Adds a custom reCaptcha integration to the Profile Builder/Profile Builder Pro login form
 * Author: Anderson Salas @ WPMUDEV
 * Task: SLS-6396
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

add_action( 'plugins_loaded', function() {
    if ( ! defined( 'DEFENDER_VERSION' ) ) {
        return; // Defender is not installed/enabled.
    }

    if ( ! defined( 'PROFILE_BUILDER_VERSION' ) ) {
        return; // Profile Builder is not installed/enabled.
    }

    $recaptcha       = wd_di()->get( \WP_Defender\Controller\Recaptcha::class );
    $recaptcha_model = wd_di()->get( \WP_Defender\Model\Setting\Recaptcha::class );

    if ( ! $recaptcha_model->is_active() ) {
        return; // reCaptcha module is not active.
    }

    $configure = function( $recaptcha ) {
        $method = new ReflectionMethod( $recaptcha, 'declare_variables' );
        $method->setAccessible( true );
        $method->invoke( $recaptcha );
    };

    add_filter( 'wppb_login_form_before_content_output', function( $output, $args ) use( $recaptcha, $configure ) {
        if ( isset( $GLOBALS['_wds_pb_recaptcha']  ) ) {
            return $output;
        }

        $configure( $recaptcha );

        add_action( 'wp_enqueue_scripts', function() use ( $recaptcha ) {
            $recaptcha->add_scripts();
        });

        $method = new ReflectionMethod( $recaptcha, 'display_recaptcha' );
        $method->setAccessible( true );

        ob_start();
        echo $method->invoke( $recaptcha );
        $markup = ob_get_clean();
        
        if ( ! empty( $markup ) ) {
            $output = str_ireplace( '</form>', $markup . '</form>', $output );
        }

        $GLOBALS['_wds_pb_recaptcha'] = true;

        return $output;
    }, 10, 2 );
});