mypmpro-basic-hcaptcha-implementation.php

<?php //do not copy

/**
 * This recipe will provide a basic implementation of the hCAPTCHA library on the checkout page. 
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

/**
 * Add the hCAPTCHA field to the checkout form. Replace SITE_KEY with your own Site Key
 * 
 */
function mypmpro_hcaptcha_add_form() {

	?>
	
  	<div class="h-captcha" data-sitekey="SITE_KEY"></div>  	
	<script src="https://js.hcaptcha.com/1/api.js" async defer></script>

	<?php

}
add_action( 'pmpro_checkout_before_submit_button', 'mypmpro_hcaptcha_add_form' );

/**
 * Verifies the hCAPTCHA response. Replace SECRET with your own Secret Key
 */
function mypmpro_hcaptcha_process( $okay ) {

	if( !empty( $_REQUEST['h-captcha-response'] ) ) {

		$request = wp_remote_post( 'https://hcaptcha.com/siteverify', array( 'body' => array(
			'secret' => 'SECRET',
			'response' => $_REQUEST['h-captcha-response']
		) ) );

		$response = wp_remote_retrieve_body( $request );

		$response = json_decode( $response );

		if( !empty( $response ) ) {
			if( !$response->success ) {
				//Validation failed - set an error message
				pmpro_setMessage("An error occured while verifying if you are human. Please try again.", "pmpro_error");
				
				return false;
			}

			return $response->success;
		}
	} else {
		pmpro_setMessage( "hCaptcha cannot be empty", "pmpro_error" );
		return false;
	}

	return $okay;

}
add_action( 'pmpro_registration_checks', 'mypmpro_hcaptcha_process' );