Adds user meta fields to 'Export Personal Data' and 'Delete Personal Data' for GDPR compliance, particularly with Register Helper add-on

add_personal_data_fields.php

<?php

function my_pmpro_add_personal_data_fields( $fields ) {
	$fields['meta_name'] = 'Pretty Meta Name';
	// Copy the above line for each field you want to include.
	return $fields;
}
add_filter( 'pmpro_get_personal_user_meta_fields', 'my_pmpro_add_personal_data_fields' );

function my_pmpro_add_personal_data_fields_to_erase( $fields ) {
	$fields[] = 'meta_name';
	// Copy the above line for each field you want deleted.
	return $fields;
}
add_filter( 'pmpro_get_personal_user_meta_fields_to_erase', 'my_pmpro_add_personal_data_fields_to_erase' );