How to add a privacy policy and terms checkbox in LearnDash registration form

Last week I wrote a blog post “How to add a privacy policy and terms checkbox in WordPress registration form“. This week I’m going to show you how to do the same in LearnDash registration form to help your site with GDPR compliancy.

LearnDash registration form is actually a styled version of the default WordPress registration form, so the process is really similar to just adding the checkbox in WordPress registration form. By going through these steps you’re going to add the checkbox both to WordPress registration form and the LearnDash registration form.

First create the checkbox by using the register_form action (remember to replace the PAGE_ID_HERE with correct page IDs and YOUR-TEXT-DOMAIN strings with the text domain of your plugin/theme):

function wpa_registration_privacy_policy_checkbox() {
	// Let's make sure everything is escaped properly
	$terms_text = esc_html__( 'Terms of Use', 'YOUR-TEXT-DOMAIN' );
	$terms_url = esc_url( get_permalink( PAGE_ID_HERE ) );
	$terms_link_html = sprintf( '<a href="%s">%s</a>', $terms_url, $terms_text );

	$privacy_policy_text = esc_html__( 'Privacy Policy', 'YOUR-TEXT-DOMAIN' );
	$privacy_policy_url = esc_url( get_permalink( PAGE_ID_HERE ) );
	$privacy_policy_link_html = sprintf ( '<a href="%s">%s</a>', $privacy_policy_url, $privacy_policy_text );

	/* translators: 1 is a link with the text "Terms of Use" and 2 is a link with the text "Privacy Policy" */
	$text = sprintf( esc_html__( 'I undestand and agree with the %1$s and %2$s.', 'YOUR_TEXT_DOMAIN' ), $terms_link_html, $privacy_policy_link_html );

	// We are using PHP heredoc syntax.
	// The lack of indentation for EOT; is intentional.
	// Read more: https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc
	$field = <<<EOT
		<label for="privacy_policy_terms_of_service">
			<input type="checkbox" name="privacy_policy_terms_of_service" class="checkbox" required />
			${text}
		</label>
		<br><br>
EOT;

	echo $field; // xss safe.
}

add_action( 'register_form', 'wpa_registration_privacy_policy_checkbox', 1, 10 );

Then add validation check via the registration_errors filter (remember to replace YOUR-TEXT-DOMAIN strings with the text domain of your plugin/theme):

function wpa_privacy_policy_validation( $errors, $sanitized_user_login, $user_email ) {
	if ( ! isset( $_POST['privacy_policy_terms_of_service'] ) ) {
		$errors->add( 'empty_privacy_policy_terms', '<strong>' . esc_html__( 'Error', 'YOUR-TEXT-DOMAIN' ) . '</strong>: ' . esc_html__( 'Please accept the Privacy Policy and the Terms of Service.', 'YOUR-TEXT-DOMAIN' ) );
	}

	return $errors;
}

add_filter( 'registration_errors', 'wpa_privacy_policy_validation', 10, 3 );

And lastly we add LearnDash registration form validation message (again remember to replace YOUR-TEXT-DOMAIN with the correct text domain):

function wpa_learndash_error_conditions( $items ) {
		$items['empty_privacy_policy_terms'] = esc_html__( 'Please accept the Privacy Policy and the Terms of Service', 'YOUR-TEXT-DOMAIN' );

	return $items;
}

add_filter( 'learndash-registration-errors',  'wpa_learndash_error_conditions', 1, 10 );

Done 🙂